rac standard repair process (2010)
TRANSCRIPT
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam1
QUI TRNH TIU CHUN
SA CHA MY IU HA NHIT (LOI GIA DNG RAC)
LGEVN / SVC Dept.
Dec. 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam2
Van y
Van ht
Ga p sutcao(Nhit cao)
Ccngoi
Cctrong
Thi gian Dec 2010
Thc hin bi LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
1. Nguyn l hot ng
S nguyn l
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam3
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
1. Nguyn l hot ng
S nguyn l
My iu ha mt chiu(Lm lnh)
My iu ha hai chiu(Lm lnh / Si m)
Cp
Cp 2
Cp 1
Van 1 chiu
My nn My nn
Van o chiu
Ccngoi
Cctrong
Ccngoi
Cctrong
Lm lnh; --Si m
Ch
- qu trnh lm lnh : Cc trong l dn bay hi (dnlnh). Cc ngoi l dn ngng (dn nng)- qu trnh si m : Cc trong l dn ngng (dn nng). Cc ngoi l dn bay hi (dn lnh)
Thi gian Dec 2010
Thc hin bi
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam4
ng c qut(Dn lnh)
Dn lnh
V mch
cc trong
V mchcc ngoi
My nn
Dn nng Van o chiu
(4 Way)
ng c qut(Dn nng)Tit lu
Van SVC
Qut ccngoi
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
1. Nguyn l hot ng
Cc linh kin c bn
Thi gian Dec 2010
Thc hin bi
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LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
1. Nguyn l hot ng
Nguyn l hot ng
C s l thuyt- Vt cht thu nhit hoc thi nhit khi thay i trng thiQu trnh ha hi (si) : Thu nhit t mi trng bn ngoiQu trnh ha lng (ngng t) : Thi nhit ra mi trng bn ngoi
- Trong my iu ha nhit ngi ta a mi cht v cc trng thi tng ng mi cht thc hin cc qu trnhsi v ngng t thc hin qu trnh lm lnh khng kh
Chu trnh hot ng
Mi cht thc hin qu trnh si trong dn bay hi (dn lnh) v chuyn t trng thi lng sang trng thi hi. Hi c my nn htv v y ln dn ngng t (dn nng). Ti dn ngng t mi cht trng thi nhit v p sut cao c qut gi lm mt, thc
hin qu trnh ngng t (chuyn t trng thi hi sang trng thi lng) v thi nhit ra mi trng bn ngoi.
Mi cht lng t dn ngng t di tc ca s chnh lch p sut chuyn ng ti thit b tit lu (ng mao, cp, van tit lu).Khi i qua thit b tit lu, nhit v p sut mi cht gim n gi tr thch hp v chuyn ti dn bay hi tip tc thchin qutrnh bay hi. Ti y mi cht thay i trng thi t lng sang hi v thu nhit ca mi trng xung quanh dn bay hi. Qu trnh cnh th lin tc xay ra trong my iu ha nhit .
Thi gian Dec 2010
Thc hin bi
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CC DNG SN PHM 2010
2010C IM CHNH
Phthng
Caocp
Inverter
- Inverter: Tit kim
in, n thp
-Thng nht kiu
dng
- M rng dng
sn phm
-Thm chc nng:
Tm lc H1N1
A-C09 M/G/SA-C12 M/G/S
N-C09IN-C12I
J-C09T / J-C12TJ-H09T / J-H12T
J-C18S / J-C24SJ-H18S / J-H24S
A-C18 M
A-C24 M
F-09CN / F-12CNF-09HN / F-12HN
F-18CN / F-24CNF-18HN/ F-24HN
R-09CNR-12CN
V-09CDV-12CD
2009
Thng 2/20 10
Thng 2/20 10
Thng 1/20 10
Thng 1/20 10
Chms
csckho
V-09CEV-12CE
Thng 2/20 10
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
2. Cc model chnh
Lch s pht trin
Thi gian Dec 2010
Thc hin bi
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CCH C TN MODEL
1 2 3 4 5
Capacity
Series
LineType
1. Line:
A: Art Cool
V: Health + Inverter
R: Health+ Chm sc sc kho
F: Health + Ph thng
2 3.Btu
09: 9000 BTU
12: 1200 BTU
18: 1800 BTU
24: 2400 BTU
4 :Type
C: Cooling (Mt chiu)
H: Heat-pump (Hai chiu)
5. Series
N: Normal (Thng thng)
M: Mirror
G: Golden
S: Silver
E: Normal inverter
D: Plasma inverter
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
Thng s k thut & c tnh
Thi gian Dec 2010
Thc hin bi
V d: F09CN
My lnh Health ph thng
Cng sut my 9,000 BTU/h
My mt chiu lm lnh
Loi thng thng
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CCH C TN MODELLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
M t cng ngh inverter
Thi gian Dec 2010
Thc hin bi
V sao cng ngh Inverter c th tit kim in nng
Nhit phng (0C)
Nhit mongmun
30
26
22
18
Thi gian
TT
Lm lnhnhanh hn
Nhit thayi lin tc
Nhit phngLun n nh bng
cch iu chnh tc quay ca my nn
M
Loi thng thng
iu ha Inverter LG
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CCH C TN MODELLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
H thng mn lc chm sc sc kho
Thi gian Dec 2010
Thc hin bi
Tm lc sinh hc Tm lc 3 lp Tm lc PlasmaTm lc H1N1 Tm lc chng d ng
Lc bi Kh mi Dit khun Dit virus cm A(H1N1)
Chng d ng
H THNG LC KH DIT KHUN
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam10
CCH C TN MODELLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
Thng s k thut & c tnh
Thi gian Dec 2010
Thc hin bi
Lm lnh nhanh Jet Cool
Dn tn nhit m vngT ng lm sch
T ng thi gi 4 hng
iu chnh hng thi gi
Cng ngh DC Inverter
Tm lc Plasma
Tm lc chng d ng
Tm lc dit H1N1
V09CD V12CD
Cng sut 2,843 3,520
9,700 12,500
Tiu th in 670 1,010
Dng in 3.1 4.6
EER 4.24 3.4914.5 12.4
Lu lng gi Cc trong ti a 11.5 (406) 11.5 (406)
Cc ngoi ti a 38 (1341) 38 (1341)
Thng s k thut n vTn Model
W
Btu/h
W
A
W/WBtu/h.W
m3/min(CFM)
m3/min(CFM)
V09CD 9,700Btu/h
V12CD 12,500Btu/h
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam11
CCH C TN MODELLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
Thng s k thut & c tnh
Thi gian Dec 2010
Thc hin bi
R09CN R12CN
Cng sut 2,638 3,517
9,000 12,000
Tiu th in 850 1,140
Dng in 3.8 5.1
EER 3.1 3.1
10.6 10.5
Lu lng gi Cc trong ti a 7.6 (269) 8.8 (311)
Cc ngoi ti a 20 (706) 38 (1341)
Tn Model
W
Btu/h
W
Thng s k thut n v
m3/min(CFM)
A
W/W
Btu/h.W
m3/min(CFM)
R09CN 9,000Btu/h
R12CN 12,000Btu/h
Tm lc Plasma
Tm lc chng d ng
Tm lc dit H1N1
Lm lnh nhanh Jet Cool
Dn tn nhit m vng
T ng lm sch
T ng thi gi 4 hng
iu chnh hng thi gi
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam12
CCH C TN MODELLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
Thng s k thut & c tnh
Thi gian Dec 2010
Thc hin bi
F09CN F12CN
Cng sut 2,726 3,517
9,300 12,000
Tiu th in 900 1,140
Dng in 4.0 5.1
EER 3.0 3.1
10.3 10.5
Lu lng gi Cc trong ti a 7.6 (269) 8.8 (311)Cc ngoi ti a 20 (706) 38 (1341)m3/min(CFM)
W
A
W/W
Btu/h.W
Thng s k thut n v
m3/min(CFM)
Tn Model
W
Btu/h
F09CN 9,300 Btu/h
F12CN 12,000 Btu/h
Tm lc dit H1N1
Tm lc 3 lp
Lm lnh nhanh Jet Cool
Dn tn nhit m vng
T ng thi gi 2 hng
T vn hnh khi c in li
CCH C TN MODEL
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam13
CCH C TN MODELLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
Thng s k thut & c tnh
Thi gian Dec 2010
Thc hin bi
F18CN F24CN
Cng sut 5,275 7,034
18,000 24,000
Tiu th in 1,800 2,700
Dng in 8.5 12.6
EER 2.9 2.6
10.0 8.9
Lu lng gi Cc trong ti a 13 (495) 14.9 (526)
Cc ngoi ti a 43 (1519) 43(1519)
Tn Model
m3/min(CFM)
W
A
W/WBtu/h.W
Thng s k thut n v
m3/min(CFM)
W
Btu/h
Tm lc 3 lpLm lnh nhanh Jet Cool
T ng thi gi 2 hng
T vn hnh khi c in liF18CN 18,000 Btu/h
F24CN 24,000 Btu/h
CCH C TN MODEL
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam14
CCH C TN MODELLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
3. Tn Model
Thng s k thut & c tnh
Thi gian Dec 2010
Thc hin bi
F09CN F12CN F18CN F24CN
Cng sut 2,726 3,517 5,275 7,034
9,300 12,000 18,000 24,000
Tiu th in 900 1,140 1,800 2,700
Dng in 4.0 5.1 8.5 12.6
EER 3.0 3.1 2.9 2.6
10.3 10.5 10.0 8.9
Lu lng gi Cc trong ti a 7.6 (269) 8.8 (311) 13 (495) 14.9 (526)
Cc ngoi ti a 20 (706) 38 (1341) 43 (1519) 43(1519)
Thng s k thut n v
m3/min(CFM)
Tn Model
m3/min(CFM)
W
A
W/W
Btu/h.W
W
Btu/h
F18HN Lm lnh: 18,000 Btu/h
Si m: 19 000 Btu/h
F24HN Lm lnh: 24,000 Btu/h
Si m: 24,000 Btu/h
F09HN Lm lnh: 9,000 Btu/h
Si m: 9 000 Btu/h
F12HN Lm lnh: 12,000 Btu/h
Si m: 13,000 Btu/h
2 chiu
Tm lc dit H1N1
Tm lc 3 lp
Lm lnh nhanh Jet Cool
Dn tn nhit m vng
T ng thi gi 2 hng
T vn hnh khi c in li
CCH LA CHN CHIC IU HO PH HP
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam15
CCH LA CHN CHIC IU HO PH HP
Cng sut my cn ph hp vi kch thc phng
- Cng sut iu ho cn ph hp vi din tch phng.- Nu phng qu ln so vi cng sut iu ho th s mt thi gian lm lnh v tn in.
9,000 15m2=
BTU Din tch
12,000 16m2-22m2=
18,000 =
24,000 =
22m2-30m2
31m2-35m2
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
4. La chn cng sut my
Chn my theo kch thc phng
Phng tiu chun:
1. Tng dy 20cm
2. Lp cc ngoi trnh hng ng, Ty
3. Cc trong cch mt t 2,5-2,7m
4. Phng kn
5. Khng s dng nhiu to nhit, nu s dng nhiu th phi b ti
Thi gian Dec 2010
Thc hin bi
CCH LA CHN CHIC IU HO PH HP
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam16
CCH LA CHN CHIC IU HO PH HPLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
5. K thut sa cha c bn
5.1 Phng php thu ga
M ng
X kh
Ccngoi
ng(van y)
Bc 1: Kim tra trng thi ca cc van chn.Cc van phi trng thi m.
Bc 2: Vn hnh h thng chc nng lmlnh khong 15 pht.
Bc 3: Dng h thng v ch khong 3 phtsau np ng h np ga vo van ng ht. Ch : ni u dy c ti ca ng h np ga vi vanca my.
Bc 4: X kh cho ng h v cc dy bngcch t t m van ng ht x kh.
Bc 5:ng van ng y ca cc ngoi vkhi ng h thng ch lm lnh cho nkhi p sut trong h thng t gi tr 1kg/cm2.
Bc 6:Dng h thng v ngay lp tc ng van ng ht. Thao tc nhanh chng p sut trn ng h khng tng qu 3 n
5kg/cm2.Ch : Nu khng kp ng van th c th ng 2/3 van ht ri dng my. Vic ng hon ton van ht trc khi dng my c th lm hng bphn ht nn ca my do chy p sut thp v thiu du bi trn.
Bc 7:Tho ng h v lp tt c cc rc-co, lp van. Kim tra x ga (th kn) cho cc van ca cc ngoi. Khi kim tra trnh nc x phng lt vo bn trong van.
Cctrong
M(van ht)
Thi gian Dec 2010
Thc hin bi
CCH LA CHN CHIC IU HO PH HP
5 K th t h b
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam17
CCH LA CHN CHIC IU HO PH HPLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
5. K thut sa cha c bn
5.2 Phng php x b ga
Bc 1: Kim tra cc van v chc chn cc van ang trng thi m.
Bc 2:Ni ng h np ga vi van ng ht.Ch : Cc van ca ng h phi trng thi ng trc khi ni vo my.
Bc 3: M van xanh (Lo side) ca ng h v x ga cho n khi p sut t 0 kg/cm2.Ch : X ga t t trnh vic du theo ga ra ngoi lm my nen thiu du. Chy my trong tnh trng thiu du c th lm hngmy nn.
M ng
X kh
Ccngoi
M(van y)
M(van ht)
Cctrong
Thi gian Dec 2010
Thc hin bi
CCH LA CHN CHIC IU HO PH HP
5 K th t h b Thi i D 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam18
CCH LA CHN CHIC IU HO PH HPLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
5. K thut sa cha c bn
5.3 Phng php ht chn khng
Bc 4: Tho dy ng h khi bm ht.Ch :
- Phi thng xuyn kim tra du bi trn ca bm chn khng. Nu thiu phi b sung. Nu bn phi thay du mi.- Nu dng bm ht trong qu trnh ht chn khng phi ng van xanh ca ng h trnh tnh trng du bi trn camy nn hi ngc vo trong h thng llnh do chnh lch p sut.
M ng
Ccngoi
M(van y)
Cctrong
M(van ht)
Bc 1:Ni cc dy ca ng hnp vi my v bm ht nh hnhv.
Bc 2: Chy bm ht chnkhng. Ht chn khng cho nkhi chn khng t -760mmHg hoc thp hn. Vi cctrng hp r ht ga lu ngythi gian ht c th cn ti hnggi.
Bc 3:ng van xanh (Lo side)ca ng h, tt bm ht chnkhng. Theo di kim ng htrong khong thi gian khong 15pht hoc lu hn v chc chnrng ch s ca kim ng hkhng thay i (p sut khngtng ln).
Thi gian Dec 2010
Thc hin bi
CCH LA CHN CHIC IU HO PH HP
5 K thut sa cha c bn Thi i D 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam19
CCH LA CHN CHIC IU HO PH HPLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
5. K thut sa cha c bn
5.4 Phng php np ga
Nu khng dng cn th vic np ga lng cho my ang chy nn thc hin t t, np t mt. Khi p sut t khang 50 PSI thi nn chuyn sang np ga hi tin cn chnh lng ga np.
Gi tr p sut trn ng h ch chnh xc khong 20 pht sau khi dng np ga lng vo my. (Thng thng cao ln)
Bc 1:Ni ng h np vi chai ga vmy nh hnh v.Ni dy ng h va tho t bm chn
khng vi chai ga. S dng cn v ln ngc chai ga c th np ga lng cho h thng.
Bc 2: X kh chong h M van chai ga v nhn nh vo ux kh ca ng h . (Hy cn thn viga lng).
Bc 3: M van xanh (Lo side) v tinhnh np ga lng cho h thng.
Nu khng th np khi lng ga nhtnh cho h thng th c th np thnhnhiu ln, (mi ln np khong 150 gam)trong khi my ang chy ch lmlnh; Tuy nhin phng php ny khnghiu qu v tn thi gian. Hy ikhong vi pht v tin hnh nht ga ri
tip tc thc hin qu trnh np.
M ng
Ccngoi
M(van y)
Cctrong
M(van ht)
Thi gian Dec 2010
Thc hin bi
CCH LA CHN CHIC IU HO PH HP
5 K thut sa cha c bn Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam20
CCH LA CHN CHIC IU HO PH HPLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
5. K thut sa cha c bn
5.4 Phng php np ga
Gi tr p sut ht ca my lnh LGvo khong t 65~80 PSI. Gi tr nyph thuc vo nhit ngoi tri, nhit
trong nh, sch ca dn, li lc. quyt nh p sut ht cn kim tranhit ng ht. My ga thng nght phi lnh sau khong 20 pht k tlc my nn bt u chy.
CH :1. Tuyt i trnh vic np khi lng
ln ga lng lin tc vo ng ht
ca my trong khi ang chy. Vicny c th lm hng hoc gim tuith my nn.
2. Khi np ga lng cho my p sut hts thp hn thc t. Hy vn hnhmy sau 30 pht p sut h thngn nh trc khi o.
Bc 4: Tho ng h np ga.
Bc 5:Lp cc m van.
Ch : Th kn sau khi lp cc m van.
M ng
Ccngoi
M(van y)
Cctrong
M(van ht)
* Khi np ga R410 th cc gi tr p sut tng khong 1,5 ~ 1,6 ln so vi R22
Thi gian Dec 2010
Thc hin bi
CCH LA CHN CHIC IU HO PH HP
5 K thut sa cha c bn Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam21
CCH LA CHN CHIC IU HO PH HPLGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
5. K thut sa cha c bn
5.5 Phng php hn hi
1. B hn hi bao gm: Chai gas Chai oxy Dy hn hn 5 mt, Van an ton
ng h chai oxy, chai gas Bc hn.2. Hng dn hn:
Bc1: M chai Oxy trc sau m chai gas sau.
Bc2: Kim tra ng h chai gas v chai oxy (ng h chai gas 0.5kg v gi khong 0.4`0.6 kgf/cm2).
Bc3: M v iu chnh van bc hn (Van oxy m trc sau van ga).
Bc4: Mi la v in chnh ngn la sao cho hp l nht.
Bc5: Kt thc hn kho van gas trc sau kho van oxy. (Kho chai gas trc sau kho van chai oxy).
Thi gian Dec 2010
Thc hin bi
Vn an ton:
Ch chai gas v chai oxy xa v tr hnt nht 3m.
Khi kt ni dy hn vo chai oxy va gastrnh du m v cao su.
Phi c van an ton hn ch ti nn
6 X l r nc Thi gian Dec 2010
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1. ng nc thi khng thng lm nc
chy ngc t phn gp ca ng nc.Ko thng ng nc
2. ng nc thi cao hn mng nc.H thp ng nc.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
6. X l r nc
6.1 R nc do lp t
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
R nc
trong nh
Nc nh xung t
pha di ca cctrong.
1. Kim tra tnh trng ng nc thi b caohn mng nc hoc ng ng dcngc t ngoi vo trong lm nckhng chy ra c.H thp ng ngNng cao cc trong
2. Kim tra ng ng xuyn qua tngc b dc ngc theo l khoan khngKhoan li l
Nc nh xung tpha di ca cctrong.
Thi gian Dec 2010
Thc hin bi
i h hit Ni 6 X l r nc Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam23
1. Kim tra r r ti mng, ng nc thi
hoc phn ng nc thi ni thm .c bit ch cc ch ghp ni. Dng keoDng bng cao su non
2. Kim tra tnh trng r r gy ra do ngnc thi khng ni hon ton vimng nc thiDng thanh kpDng lt rt (lt nha)
Dn lnh
Mng
Indoor unit
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
6. X l r nc
6.1 R nc do lp t
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
Nc nh xung t
pha di ca cctrong.
u ngcao ln
R nc
Phn ng ni thm
Dng quai nh nhaHoc thp c nhcho u ng
Nc nh xung tpha di ca cctrong.
Thi gian Dec 2010
Thc hin bi
iu ha nhit Ni 6. X l r nc Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam24
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
6. X l r nc
6.1 R nc do lp t
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
Nc chy vo trongnh theo ng ng khitri ma
ng ng
Khi cc ngoi cao hncc trong v ng ngkhng ng qui cch
nc mua c th chyngc vo trong
Un ng ng to
By nc pha bnNgoi tng
ng ng
1. Bo n ti cc im ni rc co khng
ng qui cchBc li bo n
2. Bo n b gim cht lng sau thi gians dng (C ng sng trn b mt) Thay bo n mi
Nc chy xung t
ng ng ga
Thi gian Dec 2010
Thc hin bi
iu ha nhit Ni 6. X l r nc Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam25
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
6.2 R nc do s dng
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
Nc chy vo trongnh do dn lnh v li
lc gi b nght bn
Triu chng khi dn nght bn
Gi yu, km hoc khng lnh. Chnh lch nhit vo / ra nh hn10. (Bnh thng t: 10 ~ 12) Khi np thm ga, p sut khng tnghoc tng chm
C nc ng xung quanh ming thi giv mng nc thi.
C th c tuyt v ng hi v van ht. C ga lng v my nn v ng ht.
V sinh dn lnh v li lc bng hinn hoc bm nc p sut cao.
Khng kh & Bi
Khng kh
Sch
Nc ngng
g
Thc hin bi
iu ha nhit Ni 6. X l r nc Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam26
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
6.3 R nc do cht lng sn phm
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
1. Kim tra xem c vt cn (ba-via, chtbn) trn ng n nc t cc chi
tit nha ti mng nc thi khng (4v tr tri, phi, trn, di)
Ty ba-viaV sinh cht bn
Nc chy xung tpha di cc trong
1. Kim tra tnh trng dn bo n trn xat-xi my. Bo n ny khng c ph ln
ng i ca nc
Dn li bo n
Nc chy xung tpha di cc trong
g
Thc hin bi
iu ha nhit Ni 6. X l r nc Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam27
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
6.3 R nc do cht lng sn phm
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
1. Nc ngng t ng ng nh rangoi mng
S dng lt nha buc cht bo npha trn cc u ng ca dn lnh
Nc chy xung tpha di cc trong
1. ng ng t st vo cc chi tit nhalm ng sng
Dn b sung bo n vo pha idin vi ng ng.
Nc chy xung tpha di cc trong
Thc hin bi
iu ha nhit Ni 6. X l r nc Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam28
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung 6.3 R nc do cht lng sn phm
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
1. Nc ngng t dn lnh chy rangoi theo bo n (dn sai qui cch)
Dn li bo n sao cho nckhng chy c t bo n ra vnha ri xung sn nh
Trong mt s trng hp c thdn bo n ln b mt ca dn dnlnh ngn nc chy ra v my
Nc chy xung tpha di cc trong
* Dn bo n c th nh hng n nng sutca my
Thc hin bi
iu ha nhit Ni 7. My khng lnh Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam29
LGEVN / SVC Dept.
gia dng (RAC)
dung 7.1 Mt lnh hon ton
Phn loi Triu chng Hnh nh minh ha Phng php sa cha
Kim tra li ci t ca ngi s dng- Ch hot ng (lm lnh, sim, ht m, t ng)- Nhit ci t (nhit ci tphi thp hn nhit phng t nht 2 C)
Kim tra iu khin t xaC th kim tra iu khin t xa bngin thoi di ng:- Bt camera ca in thoi di ng
- Hng trc tip iu khin vocamera ca in thoi v nhn ccnt chc nng ca iu khin. Nuthy mn hnh in thoi c hinchm sng l iu khin cn hotng.
Kim tra m t cc ngoi
My mt lnh hon ton 1. Ci t nhit v ch vn hnh sai
2. Hng qut gi cc ngoi
Thc hin bi
iu ha nhit Ni 7. My khng lnh Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam30
LGEVN / SVC Dept.
gia dng (RAC)
dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton Triu chng m t hng- Khng hot ng.
- Tc thp hoc rt thp.- Trc m t khng quay do hng vng bi.- C khi, mi kht t m t.- Ting n ln.
Phng php sa cha- Tt ngun, tho conector, ly m t ra
ngoi.-o in tr cc cun dy ca m t
(Cun chnh, cun ph, cun tc ). occh in ca cun dy vi v m t.- S dng t in cn tt kim tra tnh
trng hot ng ca m t.
Kim tra t qut gi
- Dng ng h vn nng thang x100Khoc thang o t in kim tra hai cc Cv F ca tuh in.- Thay th nu t b hng hoc kh
3. Hng t in qut gi
c
F
H
Thc hin bi
iu ha nhit Ni 7. My khng lnh
Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam31
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton 1. Kim tra cun dy ca my nna) Kim tra chm v
- Tho dy in khi my nn.-t ng h thang Rx1Kv o in
tr gia cc gic cm vi v ng ht(phn ng ng). Nu in tr di1000K (1M) l my nn b chm v Thay my nn
b) Kim tra in tr cun dy-t ng h thang Rx1 v o 2 trong
3 chn R,S,CV d: R-S 4.5; C-S 3 C-R 1.5
- Khi khng o c gi tr in tr ->cun dy b t thay my nn.Ch :
* Mt s loi my nn LG c gi tr intr cc cun R v S gn bng nhau
* Vi cc my nn c OLP bn trong, phichc chn OLP trng thi NGkhi o in tr cun dy (lm ngui mynn trc khi o)
4. Hng my nn
Bnh gp
S
R C
Gic cm
V tr R, S, C (Nhn t trn xung)
Thc hin bi
iu ha nhit Ni 7. My khng lnh Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam32
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
Hng my nn (tip theo trang trc)
2. Hng phn c my nn (kt)a). Khng khi ng (C dng in vo my nn nhng my khng khi ng)
- Kim tra t in- Kim tra ga (tha qu nhiu ga)- Kim tra in p (Ch cc trng hp o khi khng ti in p vn nhng khi my nn khi ng in p tt nhiu)- Khi cc yu t trn khng c vn g th my nn b kt c.
b) Khc phc- Th dng t khi ng u song song vi t ngm hoc dng t ngm ln hn (sau khi khi ng c phi thay t v gi tr
ban u.- Th x b ton b ga v khi ng my nn- Nu khng khi ng c, thay my nn.
3. My nn b yu (My nn vn chy nhng nng sut lnh gim. p sut ht cao, p sut nn thp, dng in thp)Kim tra- Khi ng cc ngoi sau khi tho dy in qut gi. Nu thy p sut, dng in khng tng th my nn b hng- Kim tra nhit ng y. Nu di 50 C -> My nn hng-o dng in. Nu dng thp (khong nh mc) -> My nn hng
- Th tin hnh thu ga (ng van y v chy my nn). Nu p sut ht khng gim hoc gim t -> My nn hngSa cha- Thay th my nn mi- Ch : Trong trng hp my nn b chy cun dy hoc b hng phn c (ht, nn yu) th kh nng cc cht bn tora t my nn theo ga i vo h thng. Trc khi thay my nn phi v sinh bn trong h thng c bit l cp, phin lc
Thc hin bi
iu ha nhit i d (RAC)
Nid
7. My khng lnh Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam33
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton
ng h thang kim tra t hoc thangRx100K
* o hai cc ( C - H ).
- Bnh thng : in tr gim sau tng dn
- Khng bnh thng : in tr v cngln, rt nh hoc khng i
5. Hng t in my nn
c
F
H
6. Hng r-le bo v (OLP)
Thc hin bi
iu ha nhit i d (RAC)
Nid
7. My khng lnh
Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam34
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton
Linh kin ny bao gm in tr dng
ta nhit vo thanh lng kim khi xy raqu dng.
Nhit ng / ct 115 5 ct
93 5 ng
Cc im kim tra khi OLP ct
-in p (T kh, hng)- T in- Dn nng nght bi bn- Tc , nght cp, phin lc
Trong trng hp ny OLP hot dng bnhthng
kim tra chnh xc OLP phi o khimy ngui
OLP bnh thng : 0OLP khng bnh thng : in tr vcng ln.
6. Hng r-le bo v (OLP)
in tr
Tm lng kimTip im ng
Tip im tnh
Thc hin bi
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam35
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton Dng ng h vn nng thang VAC 300o in p cp cho my nn v qut gi t
hp iu khin (PCB) ca cc trong
Bnh thng: bng in p ngunHng: Khng c in p
Ch : Khi o phi chy my ch lmlnh vi ci t nhit ph hp
7. PCB cc trong khng cp in cho my nn
Thc hin bi
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7 1 Mt l h h t
Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam36
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
LG Electronics VietnamSVC Dept. / Field Supporting Team 28/94
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton Dng ng h vn nng thang VAC 300o in p cp cho my nn v qut gi t
hp iu khin (PCB) ca cc trong
Bnh thng: bng in p ngunHng: Khng c in p
Ch : Khi o phi chy my ch lmlnh vi ci t nhit ph hp
Sau khi kim tra u ra trn cc trong,tip tc o in p trn cu u ca ccngoi. Nu khng c in trn cc ngoi cth t dy hoc chm mt
Xc nh tng nguyn nhn v x l.
Ch :C th o thng mch bng cchchp cc u dy v o tng cp mt pha cc trong hoc cc ngoi.
8. t dy in t cc trong ra cc ngoi
Thc hin bi
G / S C
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7 1 Mt l h h t
Thi gian Dec 2010
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam37
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
LG Electronics VietnamSVC Dept. / Field Supporting Team 29/94
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton Khi van ng dng ga khng lu thng vmy mt lnh hon ton
- Dng mt quan st nu li van nm sutrong van th van ang trng thi ng
M van, ch khong 5 pht cho n khicn bng v khi ng my.
Ch :- m van dng cha lc nng vn ngcchiu kim ng h.- ng van dng cha lc nng vnthun chiu kim ng h.
9. Van chn cc ngoi khng m
< Van 3 ng >
Ti cc trong
Thc hin bi
LGEVN / SVC D t
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7 1 Mt lnh hon ton
Thi gian Dec 2010
Th hi bi
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam38
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton 10. My b r ga Tham kho trang 34 thm chi tit
Khi sa cha, lun thc hin vic ni rc
co theo nguyn tc sau.
t thng tm 2 u rc co (u c
u ci) sau dng tay vn trc. Ch
dng c l (m lt) vn cht
Lc vn rc co: tham kho tiu chun
sau (JIS)
ng knh Tiu chun JIS6.35 8.6~9.0
9.52 12.6~13.0
12.7 15.8~16.2
15.88 19.0~19.4
Thc hin bi
LGEVN / SVC Dept
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7 1 Mt lnh hon ton
Thi gian Dec 2010
Thc hin bi
-
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam39
LGEVN / SVC Dept.gia dng (RAC) dung 7.1 Mt lnh hon ton
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My mt lnh hon ton 10. My b r ga Tham kho trang 34 thm chi tit
Khi sa cha, lun thc hin vic ni rc
co theo nguyn tc sau.
t thng tm 2 u rc co (u c
u ci) sau dng tay vn trc. Ch
dng c l (m lt) vn cht
Lc vn rc co: tham kho tiu chun
sau (JIS)
ng knh Tiu chun JIS6.35 8.6~9.0
9.52 12.6~13.0
12.7 15.8~16.2
15.88 19.0~19.4
Thc hin bi
CCH LA CHN CHIC IU HO PH HP
LGEVN / SVC Dept
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7 1 Mt lnh hon ton
Thi gian Dec 2010
Thc hin bi
-
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10. My b r ga (tip theo trang trc)
1. Hi khch hng nm bt thng tin v tnh trng v hin tng ca hng hc. 2. Khoanh vng v phn on khu vc hng da trn cc nguyn tc sau y
a. My mt lnh nhanh im r ga ln, my mt lnh chm im r ga nh.b. Ti im r ga bao gi cng c du hoc mng du trn b mt ngc. Trng hp my mi lp, sau khi lp t vn lnh nhng vai ngy sau mt lnh th kh nng li lp t rt cao, sau l
cc trong. Kh nng r ti cc ngoi rt thp v R22 c nht trong cc ngoi. Nu r ga cc ngoi th khng lnh hockm lnh ngay sau khi lp t
d. Nu my chy c thi gian di sau mt lnh nhanh, u tin kim tra phn cao p (cc ngoi) trc, mt lnh lu utin kim tra phn thp p trc.
e. Khi kim tra r ga, phi dng my hoc chy qut gi dn lnh kh mi c th nhn thy du trn b mt dn v ng. Khidn cn t rt kh nhn thy du pht hin ch r ga.
f. Khi kim tra r ga bng bt x phng, nu kim tra phn thp p th my phi trng thi tt. Lc ny p sut cao s ddng tm im r ga hn. Nu im r ga nghi ng phn cao p th c th kim tra khi chy my tng p sut ln caos d dng hn.
g. Cc im thng xy ra r r ga nh saua. Ch ni ng ca phn lp tb. Ch un ng ca phn lp t c bn knh nhc. Cc mi hn trong my ti cc v tr ng c s rung ng trong khi chyd. Cc im ni u dn nnge. Cc im c s tip xc ca ng vi cc linh kin khc nh dy in, ng ng, v my (y l li ca nh sn xut)
f. Cc im ni ca cc ng c ng knh khc bit nhau nhiu, c bit l cc im ni ca cc ng nh (D3, D4) vicc ng c ng knh ln.Ch
Khi r ht ga hoc cha ht nhng khi my nn chy, p sut trong h thng nh hn khng (p sut m) th sau khi sa chaphi ht chn khng trc khi np gaKhi r t ga (khi chy p sut cn trn khng p sut dng) th sau khi sa cha ch cn x kh l c.
LGEVN / SVC Dept.g g ( ) g 7.1 Mt lnh hon ton Thc hin bi
LGEVN / SVC Dept
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7 2 My lnh yu
Thi gian Dec 2010
Thc hin bi
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam41
LGEVN / SVC Dept.7.2 My lnh yu
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu 1. Ci t nhit v tc qut khng hp l Chn tc qut highChn nhit thp hn ci t ban u
2. Dn lnh v li lc gi b nght bn
V sinh li lcV sinh dn lnh bng kh nn hoc bmnc p lc cao.
3. Qut gi cc trong chy sai tc Dng iu khin thay i tc qut vkim tra xem tc m t c thay ikhng (cm nhn tc gi hoc dngthit b o tc )
Ch :C th dng n ca in thoi chiu vo cnh qut v thay i tc ng thi quan st bng ca cnh qut
nh gi c chnh xc hn.* Vi m t chy t phi kim tra in dungca t in trc.
Nu khng iu khin c m t ,kim tra v thay th PCB hoc m t
Thc hin bi
LGEVN / SVC Dept
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7.2 My lnh yu
Thi gian Dec 2010
Thc hin bi
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam42
LGEVN / SVC Dept.7.2 My lnh yu
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu 4. Cc thermistor (sensor) b hng dn n ngct my nn sm hoc khng ng cho my nn
chy.
Kim tra gi tr sensor nhit phngKim tra gi tr sensor nhit ng dn
lnhKim tra gi tr sensor nhit dn nng
Ch :C th kim tra sensor bng cch in tr khi my dng hoc in p mtchiu trn sensor khi my ang hot ng.Gi tr ca in tr v in p xem trongphn ph lc
Thc hin bi
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7.2 My lnh yu
Thi gian Dec 2010
Thc hin bi
-
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam43
LGEVN / SVC Dept.y yu
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu 5. Dn nng gii nhit km dn n gim nngxut lnh ca my.
Kim tra khong cch lp t. Nu khngx l c ngh khch hng chuyn vtr cc nng n ch khc
Loi b cc chng ngi vt xung quanhdn nng.
Khng khng gian
trao i nhit
Qu nhiu vtcn xung
quanh dnnng
V tr, khong cch lp t ng
Ch : kch thc di y ch pdng trong iu kin bnh thng (mylp n chic, khng kh lu thng tt)
50~70cm
10cm hay ln hn
Gi
Vt cn
Thc hin bi
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7.2 My lnh yu
Thi gian Dec 2010
Thc hin bi
-
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam44
py y
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu 5. Dn nng gii nhit km dn n gim nngxut lnh ca my.
Kim tra, v sinh dn nng bng kh nnhoc bm nc.
Dn nng bnght bn
6. Cng sut my khng ph hp vi kch thcphng.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7.2 My lnh yu
Thi gian Dec 2010
Thc hin bi
-
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam45
py y
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu Loi b cc vt cn trn ng gi cctrong
Cc trong treo qu cao lm gim lulng gi do tr lc ln
H thp cc trong tng lng gi
Phng c qu nhiu ca s hoc ca squ ln, nhiu thit b ta nhit.
Lp rm ph hp cho ca s gim tn
tht nhit
Tham kho phn la chn cng sutmy v tnh n ph ti nhit thc t gii thch cho khch hng hoc ngh lpt thm my.
Thng s c bn khi my tt
* chnh lch nhit : 10~12 * p sut ht : 4,5 ~ 5,5kg/cm2(o ch qut high
6. Cng sut my khng ph hp vi kch thcphng, Cc trong treo qu cao, nhiu vt cn
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7.2 My lnh yu
Thi gian Dec 2010
Thc hin bi
-
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Ti liu hun luyn k thut my lnh LG Electronics Viet Nam46
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu 7. My b r ga, thiu ga
p sut ga tiu chun : 4.5 ~ 5.5Kg/* 1/ = 14.22 psi* 1mpa = 10.2kg/
Ch : p sut ga ph thuc vo rt nhiu
yu t- Nhit phng- Nhit mi trng (dn nng)- Tc qut gi (cc trong)
Thng thng nu my ga th saukhong 20 ~ 30 pht vn hnh, ng htphi mt lnh
My tha ga khi dn nng, nng qumc bnh thng v dng in ln hngi tr nh mc.
Tham kho phng php sa cha trongphn my mt lnh hon ton
Sau khi khc phc ch r ga, np b xungga cho my (xem thm phn phng phpnp ga)
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7.2 My lnh yu
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
47/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam47
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu 8. My b nght cp Hin tng1. Dn nng nng hn bnh thng2. p sut ht thp
3. My nn nng hn bnh thng. C thr-le nhit ca my nn ng - ct nhk
4. Dng in cao hn gi tr nh mc5. p sut ht thp6. Khi np ga b sung, p sut ht tng
chm7. My km lnh, dn lnh khng t ht
Sa cha1. X b ton b ga trong h thng2. Nh mi hn u cp ni vi van y3. Dng n hn kh nng ng cp4. Dng ni-t thi ng. Nu khng c
ni-t c th khi ng my nn (van ht trng thi m) y ht cn bn rangoi
5. Hn u rc-co kim tra li tr lcca cp (gi tr tr lc thng t
80~100 PSI). Trng hp tr lc vncao th thay cp mi
6. Hn li ng cp v np ga (xem thmphn np ga)
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
7. My khng lnh
7.2 My lnh yu
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
48/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam48
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My lnh yu 9. Khong cch cc trong v cc ngoi qu xa,hoc chnh lch v cao gia cc trong v cc
ngoi qu ln.
Tham kho bng di bit thm v khongcch cho php v lng ga np thm cho myCh : Bng ny ch c gi tr tham kho. Thngs chnh xc cn kim tra ti liu k thut catng model
Trong trng hp my lp qu xa hocchnh lch cao ln cn t vn khch
hng thay i v tr lp t.
Din tch(m2)
Khong cch (m) Ga b sung (g/m)
tiuchun Ln nht
tiuchun Ln nht
16 (9K) 5 10 20 2523 (12) 5 10 20 25
29 (18K) 5 15 20 3039 (24K) 5 20 40 45
49 5 20 40 45
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
8. My khng si
Phng php kim tra & x l
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
49/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam49
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My khng si
* Qut gi cc trong ch hot ng khi nhit dn cao hn 28 C
1. Bt my, chn ch si2. Ci t nhit (cao hn nhit
phng t nht 2 )3. Ch khong 3~5 pht, nu khng thycc ngoi hot ng kim tra ccsensor nhit phng v ng (thamkho phn ph lc)
4. Kim tra in p cp cho my nn, qutgi cc ngoi v van o chiu trn cuu in ca cc trong
5. Nu khng c in kim tra PCB cctrong (ch cc tip im v ngun
nui cho cc r-le). Thay th PCB cctrong nu cn thit.
6. Nu c in ti cu u cc trongkim tra thng mch dy in ni tcc trong ra cc ngoi.Kim tra dy in bn trong ccngoi.Kim tra t in cc ngoiKim tra cun ht v van o chiu
Ch :Nu cc ngoi c chy v ngt saumt khong thi gian th thng la dotc cp ph hoc van mt chiu cacc ngoi.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
9. My khng chy
9.1 My b mt ngun
Thi gian Dec 2010
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50/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam50
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My khng c ngunvo
1. Kim tra at-t-mt o in p u vo ca t-t-mt. Nukhng c kim tra phn ngun ti nh
khch hng
2. Kim tra cu ch, PCB (cc trong, ngoi, dyin)
Nu cu ch v mch in c hin tng chyth phi kim tra cc vn sau:- Kim tra chp mch my nn, m t ccngoi, dy in t cc trong ra cc ngoi- Kim tra chp mch m t, dy in cctrong.
Thay th linh kin v sa cha ty theonguyn nhn
Tham kho ph lc Kim tra PCB
Ch : Trong iu kin Vit nam rt nhiutrng hp cp ngun sai. Trc khi tinhnh sa cha cn kim tra in p ngun.
Ngun mt pha: thang VAC300 o
gia 2 dy ngun (L) v (N) 220V (15%)
Ngun 3 pha: thang VAC600 o lnlt tng dy pha (R), (S), (T) vi dytrung tnh (N) 220V(15%)
FUSE
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
9. My khng chy
9.2 Hng iu khin t xa
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
51/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam51
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
Khng iu khin cbng iu khin t xa
1. Bt ngun (at-t-mt) v kim tra xem c tingku beep hoc chiit khng
Nu khng c m thanh khi bt nguntham kho phn My b mt ngun
Nu c m thanh pht ra t cc trong thtin hnh cc bc sau y:1. Chy my ch cng bc (sdng cng tc trn cc trong) nu mychy bnh thng th hng iu khin t xahoc v mt nhn (PCB Display)
2. Kim tra iu khin t xaC th kim tra iu khin t xa bng in
thoi di ng:- Bt camera ca in thoi ding
- Hng trc tip iu khinvocamera ca in thoi v nhn cc ntchc nng ca iu khin. Nu thy mnhnh in thoi c hin chm sng l iukhin cn hot ng.Khi iu khin t xa khng hot ng
Kim tra pin (ch tnh trang pin lungy lm t v mch v sinh)3. Kim tra mt nhn v dy in t PCBdisplay ti PCB chnh Thay th nuCn thit.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
10. Ting n
My n khi hot ng
Thi gian Dec 2010
Thc hin bi
-
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52/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam5244/94
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My b n 1. Cc trong ku Kik Kik KikTak Tak Tak - Kim tra ma st gia trc m t chao vcnh vane
- Dng mt theo di cnh vane ln , xungv kim tra cc ting n bt thng, xcnh nguyn nhn v x l (Thay m tchao nu cn thit)
2. Cc trong ku Dul Dul Dul Kim tra qut cc trong: Khp ni / V nan/ Cc vt th l lm kt, chm, bi bniu chnh khp ni, v sinh, thay cnhqut, vv.
3. Cc trong ku Shik Shik Shik, Dul Dul Dul Kim tra, v sinh li lc gi
4. Cc trong ku Shak Shak Shak Kim tra, sa cha ch un ng ng
5. Cc trong ku Woong~ Kim tra m t cc trong (nghe cmnhn)Thay th m t nu cn thit
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
10. Ting n
My n khi hot ng
Thi gian Dec 2010
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-
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53/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam53
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My b n 6. Cc ngoi ku Woong Woong Woong Kim tra rung ng ca my nn-iu chnh gi treo cc ngoi-iu chnh cn bng cc ngoi-iu chnh hoc lp b sung cc chncao su gim chn
Ch : My chy trong tnh trng thiu/thaga cng gy ra cc rung ng v ting nbt thng. Trc khi cn chnh hy kimtra ga trong my.
7. Cc ngoi ku Ta Da Dak Kim tra qut gi cc ngoiSa cha, thay th nu cn thit
8. Cc ngoi ku Chi~ing Kim tra rung ng ti cc gc vung ccngoi
iu chnh gc, vn cht vt, dn thm caosu gim chn
Ngy thit lp 2010/12/22
Thit lp bi LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
11. Phng c mi l
X l mi trong phng
-
7/29/2019 RAC Standard Repair Process (2010)
54/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam54
Phn loi Triu chng Nguyn nhn & Hnh nh minh ha Phng php sa cha
My c mi l 1. Mi sn phm mi2. Mi do cc cht thm (nc xt phng)
Gii thch cho khch hng v bt thng gi kh mi. Trng hp khng c qutthng gi thig m ht ca v dng qutthng kh mi.
3. Mi do cc cht bn t lu ngy trong dn lnh V sinh dn lnh, li lc gi
4. Mi xng ngc vo phng t ng nc thi Chuyn v tr ng nc thi
5. Mi t ni tht, keo dn sau khi xy dng Gii thch cho khch hng v bt thng gi kh mi. Trng hp khng c qutthng gi thig m ht ca v dng qutthng kh mi.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.1 Bng m li cc trong
Thi gian Dec 2010
Thc hin bi
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55/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam55
M
li M t
Hin th
Cc trong Cc ngoi
LED1 LED2
LED1
(Red)
LED2
(Green)01 Thermistor nhit khng kh cc trong t / chp 1 Ln - -
02 Thermistor ng u vo cc trong t / chp 2 Ln - -
05 Li truyn tn hiu (Cc trong Cc ngoi) 5 Ln - -
06 Thermistor ng u ra cc trong t / chp 6 Ln - -
09 Li IC EEPROM (Indoor Unit) 9 Ln - -
10 Li qut cc trong kt (qu ti) 1 Ln - - -
12 Thermistor ng gia dn cc trong t / chp 1 Ln 2 Ln - -
LED1Hng chc
LED2Hng n v
LED1Hngchuc
LED2Hngdonvi
LED1Hng chcLED2Hng n v
Kiu 3
Kiu 2
Kiu 4
Kiu 1
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.2 Bng m li cc ngoi
Thi gian Dec 2010
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56/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam56
M li M t
Li hin th
Cc trong Cc ngoi
LED1 LED2 LED1 LED2
21 Li qu ti (hng comp hoc mch ngun DC) 2 Ln 1 Ln 2 Ln 1 Ln22 Li qu dng (Dng AC vt qu gi tr nh mc) 2 Ln 2 Ln 2 Ln 2 Ln
23 Li in p DC thp hn gi tr nh mc 2 Ln 3 Ln 2 Ln 3 Ln
25 in p dy cao / thp hn gi tr nh mc 2 Ln 5 Ln 2 Ln 5 Ln
26 Li my nn hoc mch ngun my nn 2 Ln 6 Ln 2 Ln 6 Ln
27 Li qu dng ca mch chuyn i in AC DC 2 Ln 7 Ln 2 Ln 7 Ln
28 Li in p DC cao hn gi tr nh mc 2 Ln 8 Ln 2 Ln 8 Ln
29 My nn inverter b qu dng (qu ti) 2 Ln 9 Ln 2 Ln 9 Ln
31 Li thp dng (Dng khng t gi tr nh mc) 3 Ln 1 Ln 3 Ln 1 Ln
32 Nhit ng x my nn inverter cao 3 Ln 2 Ln 3 Ln 2 Ln
40 Li Sensor bin dng (t / Chp) 4 Ln - 4 Ln -
41 Li thermistor ng x my nn inverter (t / Chp) 4 Ln 1 Ln 4 Ln 1 Ln
44 Li thermistor khng kh dn nng (t / Chp) 4 Ln 4 Ln 4 Ln 4 Ln
45 Li thermistor gia dn nng (t / Chp) 4 Ln 5 Ln 4 Ln 5 Ln
48 Li thermistor u ra dn nng (t / Chp) 4 Ln 8 Ln 4 Ln 8 Ln
53 Li kt ni tn hiu (Outdoor Unit Indoor Unit) 5 Ln 3 Ln 5 Ln 3 Ln
60 Li IC EEPROM 6 Ln - 6 Ln -
61 Nhit dn nng cao 6 Ln 1 Ln 6 Ln 1 Ln62 Nhit IC inverter cao 6 Ln 2 Ln 6 Ln 2 Ln
63 Nhit dn nng thp 6 Ln 3 Ln 6 Ln 3 Ln
65 Li thermistor cnh tn nhit IC inverter (t / Chp) 6 Ln 5 Ln 6 Ln 5 Ln
Kiu 1: Loi 2 led
Led 1 (Xanh)
hng n vLed 2 ()Hng chc
Kiu 2 Loi 1 led
1 Led ()
2giy
1giy
V d li 21
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
57/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam57
TH2
TH4
ng hing lng
Li Linh kin Nguyn nhn Mc kim tra
CH01 Sensor nhit phng Chp / t
- Kim tra tip xc gic cm- Kim tra gi tr in tr
CH02 Sensor nhit ng vo cc trong Chp / tCH06 Sensor nhit ng ra cc trong Chp / t
CH12 Sensor nhit gia dn cc trong Chp / t
* 25 C, gi tr in tr ca cc thermistor nh sau: TH1 : 10K TH2 : 5K TH3 : 5K
TH4 : 5K
* Gi tr cc sensor thay i theo nhit . Tham khoph lc bit thm chi tit.
PHNG PHP O
1. Tho gic cm ra khi PCB2. t ng h o thang o in tr
3. o gi tr in tr v so xnh vitiu chun
Ch : Khi gi tr sensor bnh thngm my vn bo li th PCB b hng Thay th PCB
CH01; CH02; CH06; CH12
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
58/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam58
CH05; CH09
Li Din gii Nguyn nhn im kim tra
CH05
CH09
Li truyn tnhiu gia cctrong v cc
ngoi
Li kt ni giaPCB chnh v
PCB ph
Khng c tn hiu quali gia cc trong vcc ngoi trong thigian lu hn 3 pht
t mch hoc intr tip xc ln
1. Kim tra in p ngun (cc trong v cc ngoi)2. Kim tra tnh trng u ni ca dy tn hiu, tnh trng tip
xc ca gic cm3. Kim tra cch in ca dy tn hiu vi mass (Bnh
thng > 2M)4. Kim tra tnh trng ni mass ca cc trong v cc ngoi.5. Kim tra chiu di ca dy tn hiu. Nu di hn 50m phi
thay th dy to hn v tch ring khi cc dy ngun trnh nhiu.
6. Kim tra cc dy ngun gn vi ng i ca dy tnhiu. Cc dy ngun c dng in ln i song song vidy tn hiu c th gy nhiu lm yu tn hiu.
7. Kim tra PCB (phn mch tn hiu) ca cc trong v ccngoi.
1. Kim tra tnh trng t dy, tip xc ca gic cm
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
59/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam59
CH10
Li Din gii Nguyn nhn im kim tra
CH10 M t cc trongkhng hot
ng
M t ngng hotng lu hn 1 pht
1. Kim tra tnh trng kt c ca m t (dng tay)2. Kim tra tnh trng tip xc in ca gic cm m t
3. Kim tra tnh trng thng mch ca dy in t PCB ram t (ch kim tra tnh trng t ngm bn trong bngcch dng ng h o thng mch tng dy mt).
4. Kim tra tnh trng m t (Dng m t mi th bngcch ngoi v ni vi gic cm, khi ng my. Num t khng chy, chuyn sang bc tip theo)
5. Kim tra tnh trng PCB
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
60/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam60
CH21
Li Din gii Nguyn nhn im kim tra
CH21 Dng in camy nn cao
hn gi tr nhmc
1. My nn b kt2. t, chp mch
bn trong my nn3. My vn hnh
trong iu kin quti
4. Hng PCB
1. Kim tra tnh trng lp t, tnh trng gii nhit cc nng,tnh trng bp (gp ng). Kim tra khong cch gia cctrong v cc ngoi. Kim tra tnh trng tha, thiu ga.Kim tra tnh trng ng / m ca van chn cc ngoi.
2. Kim tra tnh trng kt ca my nn. Kim tra in trcch in, tnh trng t / h mch cun dy, in tr cccun dy.
3. Kim tra tnh trng u dy U, V, W c b ngc khng4. Kim tra tnh trng cc gic cm ca PCB
5. Kim tra phn ngun inverter IPM (Chp, chy)6. Kim tra cch in cc chn u vo ca IPM
7. Kim tra tnh trng lch pha (sai lch cho php nh hn2A khi my nn chy)
t thang oin tr o gia
cc chn uvo ca IPM khi
tt ngun
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
61/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam61
CH22
Li Din gii Nguyn nhn im kim tra
CH22 Dng in xoaychiu u vocao hn gi tr
nh mc
1. in p ngun thp2. My b qu ti (Gii
nhit km, Dnnng b bn, thaga, vv)
3. Hng PCB
1. Kim tra in p ngun (190 ~ 260VAC)2. Kim tra tnh trng lp t (ging CH21)3. Kim tra tnh trng kt ca qut gi (cc trong, ngoi)4. Kim tra mch cm nhn dng in AC u vo
-t ng h thang o in p DC-o in p ti cc im nh hnh nh minh ha- Gi tr in p nm trong khong 2,5V (+/-0,2V). Nu kt
qu o nm ngoi khong ny th PCB b hng. Thay th PCB miCh : Thc hin php o khi c ngun nhng khng bt my(ch stand by hay cn gi l ch ch)
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
62/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam62
CH23
Li Din gii Nguyn nhn im kim tra
CH23 in p mtchiu thp hngi tr gi hn
140VDC
1. in p ngun thp2. Hng PCB
1. Kim tra in p ngun (190 ~ 260VAC)2. Kim tra in p mt chiu. Gi tr in p ny phi nm
trong khng 280 ~ 310VDC.3. Kim tra mch cm nhn in p mt chiu (2,4 ~
2,8VDC) trn PCB
Nu kt qu o khng nm trong khong gi tr trn th PCB b hng.Thay th PCB mi
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
63/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam63
CH26
Li Din gii Nguyn nhn im kim tra
CH26 Dng in banu ca my
nn vt gi trgii hn hockhng c tnhiu u vo
ca mch cmnhn tnh trnghot ng ca
my nn
1. My nn khnghot ng
2. My hot ngtrong tnh trng quti.
3. Hng PCB
1. Kim tra tnh trng lp t, tnh trng gii nhit, cc qutgi cc trong, ngoi.
2. Kim tra tnh trng kt c, chm mt, in tr cun dyhoc t dy ca my nn.
3. Kim tra tnh trng gic cm ca my nn4. Kim tra IPM (tham kho CH21)5. Kim tra mch cm nhn dng in (o nh hnh nh
minh ha di yCh : Thc hin php o khi my trng thi stand by (ch)
Nu gi tr in p nm ngoi khong 2,5VDC (+/-0,2) thPCB b hng Thay th PCB mi.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
64/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam64
CH27
Li Din gii Nguyn nhn im kim tra
CH27 Li qu dng ti
b phn chuyni in p xoaychiu thnh mt
chiu(AC DC)
1. My hot ng
trong tnh trng quti.
2. Hng cun cmhoc thng skhng nm trongkhong cho php
1. Kim tra tnh trng lp t, tnh trng gii nhit, cc qut
cc trong, ngoi2. Kim tra thng s cun cm (10A / 26,8mH)3. Kim tra tnh trng chp mch ca b phn chuyn i
in ACDC ti gic tn hiu vo
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter
12.3 Phng php kim tra, sa cha
CH29
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
65/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam65
CH29
Li Din gii Nguyn nhn im kim tra
CH29 Li qu dng
ca my nn
1. My hot ng
trong tnh trng quti.
2. My nn b kt c3. Hng PCB
1. Kim tra tnh trng lp t, tnh trng gii nhit, ga
2. Kim tra tnh trng kt c, tnh trng u dy my nn(ngc pha, mt pha, tip xc)
3. Kim tra cch in (>2M)4. Kim tra mch cm nhn dng in theo hnh nh di
Ch : o trng thi stand by (Bt ngun nhng khng
chy my).Gi tr tiu chun V=2,5VDC +/-0,2Nu ngoi khong ny th PCB b hngThay mi
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH32
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
66/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam66
CH32
Li Din gii Nguyn nhn im kim tra
CH32 Nhit ng x
ca my nninverter cao hngi tr gii hn
1. My hot ng
trong tnh trng quti.
2. Thiu hoc r ga3. Hng sensor4. LEV van hot ng
khng bnh thng
1. Kim tra tnh trng lp t, tnh trng gii nhit, ga
2. Kim tra qut gi cc ngoi (m t, t in) 3. Kim tra r ga, thiu ga4. Kim tra tip xc gic cm LEV, tnh trng lp rp LEV5. Kim tra tnh trng IPM (tham kho CH21)6. Kim tra tnh trng lp rp ca sensor, tip xc ca gic
cm. o gi tr in tr v so xnh vi gi tr tiu chun(200K +/-10% 25 C)
7. Kim tra cch in ca sensor vi mass (>1M)
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH40
Thi gian Dec 2010
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7/29/2019 RAC Standard Repair Process (2010)
67/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam67
CH40
Li Din gii Nguyn nhn im kim tra
CH40 Li mch cm
nhn dng inca PCB
1. Linh kin ca mch
cm nhn dngin ca PCB bhng
1. Kim tra tnh trng cc gic ngun vo
2. Kim tra mch cm nhn dng in.
o trng thi bt ngun nhng khng chy my
Gi tr trong php o 1 V=2,5 +/-0,2VDCGi tr trong php o 2 V=2,5 +/-0,2VDCNu kt qu o khng nm trong phm vi trn th mch cmnhn dng ca PCB b hng Thay mi PCB
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH41/44/45/65
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
68/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam68
CH41/44/45/65
Li Din gii Nguyn nhn im kim tra
CH41
CH44
CH45
CH65
Sensor ng x
my nninverter
Sensor gi ccngoi
Sensor ng ccngoi
Sensor cnh tnnhit IC inverter
Sensor b hng hoc
(t, chp) gic cmkhng tip xc
1. Kim tra tnh trng lp rp v cc gic cm
2. Kim tra gi tr in tr ca cc sensor theo tiu chun.
Cc gi tr trong bng l o 25 C. Tham kho ph lc c cc gi tr in tr theo nhit
Sensor ng x my nn INV 200K
Sensor gi cc ngoi 10K
Sensor ng cc ngoi 5K
Sensor cnh tn nhit IC 10K
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH53
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
69/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam69
CH53
Li Din gii Nguyn nhn im kim tra
CH53 Li khng c tnhiu t cc ticc ngoi trongtrong thi gianlu hn 3 pht
1. Cc trong b mtngun2. Khng c (t)
ng truyn tnhiu t cc trongti cc ngoi
3. Tn hiu b nhiu docc tc ng bnngoi
4. Mch truyn tn
hiu gia cc trongv cc ngoi trongPCB b hng
1. Kim tra ngun ca cc trong2. Kim tra tnh trng hot ng ca cc trong3. Kim tra ng tn hiu (thng mch, chm mt, chiu
di)4. Kim tra tnh trng ni mass ca cc trong, cc ngoi5. Kim tra cc ng dy ngun gn vi dy tn hiu. Cc
dng in ln gn dy tn hiu c th lm nhiu v mybo li
6. Kim tra cc gic cm ca dy tn hiu7. Kim tra mch truyn / nhn tn hiu ca PCB cc trong
v cc ngoi.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH60
-
7/29/2019 RAC Standard Repair Process (2010)
70/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam70
CH60
Li Din gii Nguyn nhn im kim tra
CH60 Li IC EEPROM
ca cc ngoi
1. EEPROM b sai loi
hoc khng lp.2. EEPROM b hng.3. EEPROM lp
khng ng.4. Mi hn chn
EEPROM khngtip xc.
1. Kim tra tnh trng lp rp ca EEPROM v cc phn lin
quan trong PCB. Ch kim tra hng (chiu lp) caEEPROM khi lp qua chn .
EEPROM
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH61
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
71/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam71
CH61
Li Din gii Nguyn nhn im kim tra
CH61 Nhit dn
nng cao hngii hn
1. Qut dn nng b
hng2. Dn nng trao i
nhit km3. Sensor b hng4. Van LEV hot ng
khng bnh thng5. Tha ga
1. Kim tra tnh trng lp t (tham kho phn trc)
2. Kim tra tnh trng tha ga (o p sut, dng in cnh gi chnh xc.
3. Kim tra tnh trng lp rp v hot ng ca van LEV4. Kim tra sensor o in tr v so xnh vi gi tr tiu chun o cch in ca sensor vi mass (phi > 1M)
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH62
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
72/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam72
Li Din gii Nguyn nhn im kim tra
CH62 Nhit cnh
tn nhit ICinverter cao qu
gii hn
1. My b qu ti
2. Tnh trng lp rpcnh tn nhit ICkhng tt
3. Hng sensor cmbin nhit
1. Kim tra tnh trng lp t (tham kho phn trc)
2. Kim tra tha ga3. Kim tra tnh trng lp rp (tip xc) gia cnh tn nhit
v IC trn PCB (ch lp m tn nhit di cnh)4. Kim tra gi tr in tr ca sensor (nh hnh di) Gi tr in tr R=7K +/-10%
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH67
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
73/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam73
Li Din gii Nguyn nhn im kim tra
CH67 M t qut gi
cc ngoi khnghot ng
1. M t b kt
2. Dy in, gic cmkhng thng mch
3. Hng m t4. Mch iu khin
m t b hng
1. Kim tra tnh trng kt ca m t
2. Kim tra tnh trng dy in, gic cm ni t PCB ra mt (Ch hin tng gic cm khng tip xc do my lpt lu ngy).
3. Kim tra tnh trng m t t ng h thang o in p phn cc diode o in p gia hai chn 1 v 4 ca gic cm m t Nu kt qu o nm ngoi khong 1V (+/-0,2V) th m t
b hngThay th m t
4. Nu m t khng hng, thay th PCB iu khin m t.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH21
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
74/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam74
Li Din gii Nguyn nhn im kim tra
CH21 My nn cao
dng
1. My nn b kt
2. Chp mch, tcun dy trong mynn.
3. My b qu ti4. Hng PCB
1. Kim tra tnh trng lp t (tham kho phn trc)
2. Kim tra tnh trng tha ga.3. Kim tra tc , t in qut gi cc ngoi.4. Kim tra tnh trng kt c ca my nn5. Kim tra tnh trng chp / t ca cun dy my nn6. Kim tra cch in my nn7. Kim tra tnh trng dy in, gic cm t PCB ti my nn8. Kim tra phn ngun IPM ca PCB9. Kim tra chp mch u vo ca IPM10.Kim tra lch pha (sai lch cho php l 2A)
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH22
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
75/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam75
Li Din gii Nguyn nhn im kim tra
CH22 Dng in xoay
chiu u vocao hn gi tr
gii hn
1. in p ngun thp
2. My b qu ti3. PCB b hng
1. Kim tra in p ngun (190 ~ 260VAC)
2. Kim tra tnh trng tha ga.3. Kim tra tnh trng lp t4. Kim tra tnh trng gii nhit dn nng5. Kim tra PCB
t ng h thang o Vdc. o in p ti mch cmnhn dng in u vo
Gi tr in p tiu chun Vdc = 2,5V +/-0,2V Nu kt qu nm ngoi khong ny th PCB b hng.
VDC
Btngun
nhngkhngchymy
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH23
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
76/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam76
Li Din gii Nguyn nhn im kim tra
CH23 in p mt
chiu thp hngii hn(140Vdc)
1. in p ngun thp
2. PCB b hng
1. Kim tra in p ngun (190 ~ 260VAC)
2. Kim tra gi tr in p mt chiu sau chnh lu (thngthng t 280 ~ 310V)
3. Kim tra mch cm nhn in p mt chiu
o in p mt chiu ca mch cm nhn. Thng thngVdc = 2,5V +/-0,2V
Nu ngoi khong ny th PCB b hngThay mi
Btngun
nhngkhngchymy
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH26
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
77/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam77
Li Din gii Nguyn nhn im kim tra
CH26 My nn b qu
dng hockhng c tnhiu u vo
ca mch cmnhn trng thihot ng ca
my nn
1. My nn b hng
2. My hot ngtrong tnh trng quti
3. Hng IPM ca PCB4. Hng mch cm
nhn dng lm vicca my nn
1. Kim tra tnh trng lp t, tha ga
2. Kim tra tnh trng gii nhit dn nng3. Kim tra tnh trng kt c ca my nn4. Kim tra tnh trng chp / t ca cun dy my nn5. Kim tra cch in my nn6. Kim tra tnh trng dy in, gic cm t PCB ti my nn7. Kim tra phn ngun IPM ca PCB8. Kim tra chp mch u vo ca IPM9. Kim tra mch cm nhn dng in ca PCB
o in p mt chiu ca mch cm nhn. Thng thngVdc = 2,5V +/-0,2V
Nu ngoi khong ny th PCB b hngThay mi
Btngunnhngkhng
chymy
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH29
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
78/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam78
Li Din gii Nguyn nhn im kim tra
CH29 My nn b qu
dng hoc tnhiu u vo
ca mch cmnhn trng thihot ng ca
my nn bhng
1. My nn b hng
2. My hot ngtrong tnh trng quti
3. Hng mch cmnhn dng lm vicca my nn
1. Kim tra tnh trng lp t, tha ga
2. Kim tra tnh trng gii nhit dn nng3. Kim tra tnh trng kt c ca my nn4. Kim tra tnh trng chp / t ca cun dy my nn5. Kim tra cch in my nn6. Kim tra tnh trng dy in, gic cm t PCB ti my nn7. Kim tra mch cm nhn dng in ca PCB
o in p mt chiu ca mch cm nhn. Thng thngVdc = 2,5V +/-0,2V
Nu ngoi khong ny th PCB b hngThay mi
Btngunnhngkhng
chymy
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH32
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
79/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam79
Li Din gii Nguyn nhn im kim tra
CH32 Nhit ng x
ca my nncao qu gii
hn
1. My hot ng
trong tnh trng quti
2. Thiu ga3. Sensor hng hoc
tnh trng khngtip xc ca giccm
4. Van tit lu LEVhot ng khngbnh thng.
1. Kim tra tnh trng lp t, thiu ga
2. Kim tra tnh trng gii nhit dn nng3. Kim tra gic cm ca LEV4. Kim tra tnh trng lp rp ca cun ht LEV5. Kim tra gic cm ca sensor, o cch in sensor6. o gi tr in tr ca sensor v so xnh vi tiu chun
o in in tr ca sensor. (R=200K +/-10% 25 C) Nu ngoi khong ny th PCB b hngThay mi
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Nidung
12. My iu ha Inverter12.3 Phng php kim tra, sa cha
CH40
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
80/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam80
Li Din gii Nguyn nhn im kim tra
CH40 Mch cm nhn
dng in ACu vo hocmch cm nhndng in ca
my nn bhng
1. Hng cc linh kin
ca mch cmnhn trong PCB
1. Kim tra cu u in chnh
2. Kim tra mch cm nhn dng in u vo
Bt
ngunnhngkhng
chymy
Mch cm nhndng AC
Vdc=0+/-0,2V
Mch cm nhn
dng my nnVdc=2,5+/-0,2V
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng
Ph lcKim tra my nn inverter
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
81/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam81
1. Tho gic cm khi my nn2. t ng h thang o in tr
3. o in gia cc chn my nn vi nhau4. o in tr gia cc chn my nn vi v my5. Nu gi tr in tr vth qu gi tr trong bng th
my nn b hng Thay th my nn mi.
Php o in tr
U-V 1,5~2 Ohm
V-W 1,5~2 Ohm
U-W 1,5~2 Ohm
U-Chassis Ln hn 1M
V-Chassis Ln hn 1M
W-Chassis Ln hn 1M
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng
Ph lcKim tra IPM my inverter
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
82/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam82
1. Tho gic cm khi PCB2. t ng h thang o diode
3. o in p P-U; P-V; P-W4. o in p U-Nu; V-Nv; W-Nw5. Gi tr in p tiu chun l 0,4~0,6V. Nu kt qu
o nm ngoi khong trn Thay th PCB
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng
Ph lcKim tra qut gi cc ngoi
Phng php kim tra m t qut gi cc ngoi
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
83/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam83
Triu chng m t hng- Khng hot ng, tc thp hoc rt thp.- Trc m t khng quay do hng vng bi.- C khi, mi kht t m t, Ting n ln.Phng php sa cha
- Tt ngun, tho conector, ly m t ra ngoi.-o in tr cc cun dy ca m t (Cun
chnh, cun ph, cun tc ). o cch in cacun dy vi v m t.- S dng t in cn tt kim tra tnh trng
hot ng ca m t.
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng
Ph lcKim tra my nn
Trnh t kim tra my nn
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
84/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam84
Kim tra dng khi ng Kim tra in p khi ng Kim tra ga o in tr cun dy
Kim tra cch in Kim tra dng khi ng Kim tra in p khi ngTh khi ng vi t c in
dung ln hn
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng
Ph lcKim tra t in
Chc nngTn linh kin : T in
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
85/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam85
Phng php o Phng php kim tra
Hin tng
F (m t qut)
HERM (My nn) C (chung)
y l t ngm (t chy) cho m t qut gi v my nn.Cc t ny ng thi c tc dng tng m men khi ngcho cc ng c
My nn khng khi ng v OLP ct dng vo my (c thnghe ting OLP ct tch)
ng h thang kim tra t hoc thang Rx100K
* o hai cc ( C - H ).
- Bnh thng : in tr gim sau tng dn
- Khng bnh thng : in tr v cng ln, rt nh hockhng i
c
F
H
LGEVN / SVC Dept.
iu ha nhit Gia dng (RAC)
Hintng
Ph lcKim tra OLP
Chc nngTn linh kin : O L P (bo v qu ti)
OLP l linh kin bo v dng ct dng vo my nn khi c
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
86/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam86
Phng php o Phng php kim tra
Triu chng hin tng
OLP l linh kin bo v dng ct dng vo my nn khi cs qu nhit v qu dng trong qu trnh vn hnh
My nn khng chy. Qut gi cc ngoi hot ng bnhthng. My iu ha khng lnh
Linh kin ny bao gm in tr dng ta nhit vo thanh lng kim khi xy raqu dng.
Nhit ng / ct 115 5 ct
93 5 ng
Cc im kim tra khi OLP ct-in p (T kh, hng)- T in- Dn nng nght bi bn- Tc , nght cp, phin lc
in tr
Tm lng kimTip im ng
Tip im tnh
OLP bnh thng : 0OLP khng bnh thng : in tr c cng ln
Reference Work methodDefect
Khc phc : Kim tra v khcLc vn yu R ga
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng
Ph lcKim tra r ga, bp ng
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
87/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam87
R ga
Phng php
im ni cc trong-cc ngoi
- Kim tra ch ni rc co- Kim tra ch loe cc ngoi
- Kim tra cc v tr ni (ng di)- Kim tra r ga ti cc van cc ngoiCh : Pha p sut thp : dng my.Pha cao p : chy my kim tra
Dn lnh
- Kim tra cc v tr hn- Kim tra ng ng cc trongCh : d pht hin r ga, hy kimtra vt du loang khi dn lnh kh(dng my hoc chy qut gi trongthi gian lm kh dn lnh)
Dn nng
- Kim tra cc im hn- Kim tra ng ng cc ngoi
Kim tra v xit li ccrc coLoe li cc u ng Thay van
Hn li cc im r cctrong v cc ngoi
Cc v tr hay xyra r ga trong cctrong
B chia ng cc trong
ng U
im kim tra
1. Cc ng U2. B chia, van ochiu3. ng x4. Cc ch un5. Cc v tr u, cuidn nng
6. Cc v tr b chmVi chi tit khc
7. Cc v tr rung ng
Phng php :
ng U, ng chia :Hn li
ng x, Van o chiu: Thay mi
Ch :
1. Trnh lm hng cc mi hnxung quanh v tr hn do nhitpht ra t m hn (dng cc vtchn).
2. Khi hn cc v tr gn van ochiu phi dng gi t bc xungquanh van trnh lm hng cc
chi tit bn trong.3. Khi hn bn trong cc ngoinn thao PCB e khng xy racc h hng trong qu trnh hn.
ng x (nn)
Khc phc :Kim tra v khcphc ty theo nguyn nhn (longloe, hn, thay van, vv)
Ch : Khi thy th cc van, phi
dung giy t bao xung quangvan trnh h hng cho cc chitit bn trong van trong qu trnhhn
Vn qu mnhhng phn loe ng R ga
Lc vn yu R ga
Lun tm kim vtdu khi kim tra r ga
Chc nng
Lm quay qut gi tun hon khng kh qua dn lnh (khi
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng Ph lc
Kim tra m t cc trong
Chi tit : M t qut gi cc trong
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
88/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam88
Phng php o Phng php kim tra
Triu chng, hin tng
q y q g g q (lm lnh) v dn nng (khi si)
-ng tuyt dn lnh- Khng c gi lnh thi ra- My nn khng chy (sensor ng truyn tn hiu v PCB)-n led bo li (vi mt s model)
o gi tr in tr ti cc pin (gic) nh sau
1 Vm
4 en GND
5 Trng +15V
6 Xanh FG
7 Vng Vsp
2,3 Khng c
Tiu chun4~1: (khng xc nh)4~5:20.15%4~6:2205%4~7: (khng xc nh)
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng Ph lc
Kim tra m t chao gi
Chc nngTn linh kin : M t chao gi
M t chao gi vn hnh bng ngun xung t PCB Gc m
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
89/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam89
V d v m t b n Phng php kim tra
Hin tng
- Khng iu khin c cc cnh chao gi tri/phi,ln/xung . C ting n khi cc cnh chao gi hot ng
M t chao gi vn hnh bng ngun xung t PCB. Gc mca m t c quyt nh bi s xung (tn s ngun)
- Tc ca m t c qui nh bi rng ca xung
ngun. M t chao gi dng hng gi ra t cc trongtheo nhu cu hoc vn hnh ch t ng phn phiu gi lnh
n do bnh rngm t b gy
Lm lnh
Si m
Kim tra in p cp (DC12V)
Kim tra (cm nhn) ting n khi hotng
Kim tra ch ni gia cnh gi v trc
m t
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng Ph lcKim tra ting n qut dn lnh
Triu chng
Nguyn nhn v cch khc phc
V d v qut cc trong b n
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
90/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam90
Triu chng Nguyn nhn v cch khc phc
1) Nguyn nhn : Cuc cn bng lng (tut) ra khi nan quat.
2) Khc phc : Lp cc cn bng v ng v tr v th chyqut mt vi ln kim tra
Khch hng : Qutcc trong n
Ting n1) C ting Puk Puk Puk pht ra t pha tri ca sn
phm.
Tnh trng lpt
Cccn
bng
1) Trong thc t nu qut gi b bm
bn cng gy n khi hot ng
2) Khc phc : v sinh qut, dn lnh,
phin lc.
Chc nngTn linh kin : V mch cc trong
V mch nm bn trong hp iu khin v iu khin hot
LGEVN / SVC Dept.
iu ha nhit gia dng (RAC)
Hintng Ph lcKim tra PCB cc trong
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
91/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam91
Phng php o Phng php kim tra
Triu chng, hin tng
Kim tra in p cp cho v mch.
Khi in p bnh thng, kim tra cu ch, varistor, bin p,IC ngun, t ha, vv. Ty theo hng hc m quyt nh sacha hay thay th v mch.
V mch nm bn trong hp iu khin v iu khin hotng ca my
Hng cc gic cm, housing
Tip im r-le khng tip xc
Chc nng iu khin ca MICOM khng bnh thng
FUSE
LGEVN / SVC Dept.
iu ha nhit Gia dng (RAC)
Hintng Ph lcKim tra mt nhn v Display PCB
Chc nng v hot ngTn linh kin : V mt nhn
Nhn tn hiu t iu khin t xa v chuyn n MYCOM
Thi gian Dec 2010Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
92/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam92
Phng php th nghim Trnh t kim tra
Triu chng
Khng iu khin c bng iu khin t xa
(Cc ch chy test v chy cng bc hot ng bnhthng)
Nhn tn hiu t iu khin t xa v chuyn n MYCOM
Kim tra tip xc ca gic cm v chn mt nhn
Kim tra ngun cp cho mt nhn (DC5V)
Kim tra chc nng iu khin ca iu khin t xa
Thay th nu linh kin b hng
Th nghim iu khin t xa bng camera
LGEVN / SVC Dept.iu ha nhit
gia dng (RAC)Hin
tng Ph lcKim tra ch chy cng bcThi gian Dec 2010Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
93/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam93
Nt vn hnh cng bcNt vn hnh cng bc
Vn hnh cng bc
Ch chy test
iu khin t xa
Cng tc trt
Vn hnh cng bc l gi ? :
- Khi iu khin b hng, b mt hay ht pin bnkhng th iu khin c my iu ha. Hy dngnt ny chy my.
Cc lu khi chy cng bc
- Nhit : t ng t 22
- Qut : Tc cao (khng iu khin c)Cng tc trt gm 3 nc vn hnh (RAC loi c)
LGEVN / SVC Dept.iu ha nhit
gia dng (RAC)Hin
tng Ph lcKim tra nhit gi vo / ra
Li lc gi Dn lnh
Thi gian Dec 2010Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
94/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam94
t cc sensor ti ng gi vo / ra. S dng tnhnng ca nhit k o chnh lch nhit camy.
Vi cc my iu ha nhit bnh thng, chnh nhit t 11 tr ln
Gi vo
Gi ra
Mng nc Qut
T1
T2
Phng php o
o nhit ht vo v thi ra ca dan lnh:-nh gi chnh xc tnh trng my- Cung cp cc thng tin ng tin cy, nhn thy
c khch hng
tin tng, hi lng
Cng dng
o chnh lch nhit vo / ra. Kim tra li mykhi chnh lch nh hn 10. (trc trc)
Triu chng
30
19
Nhit k in t
19
[R nc do lp t]
LGEVN / SVC Dept.iu ha nhit
gia dng (RAC)Hin
tng Ph lcTrnh t r nc do li lp tThi gian Dec 2010Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
95/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam95
Cnbng
?
YBnhThng
?
Kim tra phnni thm cang nc thi
Kim tra cn bng
ca cctrong
Y
N
Kim trang dn lnh
N
C
iu chnh
Y
N
iu chnh dcng nc thiNi li / Thay th
Kim tra, vsinh li lc
gi, dnlnh
- ng nc hng ln trn -> ng nc- Cong / Rch
- Tnh trng kt ni- Loi ng, ng knh, di
Kim tra p sut ga(4.5~5.5Kg/)
YThiuga?
N
Np ga bsung
RNc
Y
N
Kim tra, sacha tnh trngcch nhit cang
Ktthc
Kim tra tnhtrng chyngc canc votrong
Hoc
Vn r
nc
Y
N
Kim tra, v sinhng v mngnc thi
- Ni ng nc thi vibm nc hoc mynn kh thi sch .Kt
thc
Y
LGEVN / SVC Dept.iu ha nhit
gia dng (RAC)Hin
tng Ph lcKim tra my mt lnh hon ton
[My khng lnh]
Kim tra ch
- Lp ng h np ga (Nu p sut gim -> my nn hot ng bnh thng ) -o dng in
Thi gian Dec 2010Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
96/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam96
BnhThng
?Y
Hotng
?
Dng mtkim tra
qut gicc ngoic chykhng
hot ng
Y
N
Kim tra
my nn chot ngkhng?
Lnh?
Y
N
N
Hotng
?o p sut ga(4.5~ 5.5 Kg/)
La chn ch v ci tnhit
N
Y
o in cpcho cc ngoi(220V)
Kim tra vm cc vancc ngoi
Kim tra, sacha r ga, gpng, cp
Np ga
Kim tra , thay th tin / OLP
YMynnchy
?
N
KKt
thc
Kim tranhit cit(18)
YBnh
Thng?
N
o in pcp t cctrong(220V)
YBnh
Thng?
N
Kim tra, thay th PCB
Kim tra,sa chady in
o in tr cundyR-S : ~ 4.5S-C : ~ 3.0R-C : ~ 1.5
YBnhthng?
N
Ktthc
Thay my nn
- Kim tra r ga ticc im ni , ccim hn ca cctrong v cc ngoi
Ktthc
Y
Kim tra,sa chaQuat, t din
LGEVN / SVC Deptiu ha nhit
gia dng (RAC)Hin
tng Ph lcKim tra my khng mt hon ton
[My km lnh]
Kim tra lilc gi
Kim tranhit ci Kim tra tc qut Kiim tra qut
Y
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
97/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam97
Y
Y
N
Y
N
ng? Bn ?
nhit cit gi cc trong
(Dng remote iukhin tc v kim
tra xem tc m tc thay i khng
Tc Bnh
Thng?
Ci t linhit v tc qut gi
V sinhli lc giv dn lnh
Kiim tra qutgi cc ngoic hot ngkhng
(dng mt)
Kim tra, thay th- M t- T in- PCB cc trong
Kim tra tc qut giHigh
Kim tra dnlnh bn
Hotng
BT?
N
Y
- Kim tra trao i nhitcc ngoi- Kim tra nhit mitrng v khc phc- Thay i v tr cc ngoi
Kim tra, v sinhdn nng
Kim tra,thay th tin, mt
LnhTt?
Y
N
Ktthc
Kim tra psut ga(4.5~ 5.5Kg/)
X b bt ga
Kim tra sacha r ga,gp ng
Bnhthng?
Y
N
- Kim tra cc
im ni, imhn, im unca cc trong ,cc ngoi
Np ga
Kim tra kch c
phng(kch thc phng vcng sut my khngtng ng)
Tha ga
Thiu ga
LGEVN / SVC Dept.iu ha nhit
gia dng (RAC)Hin
tng Ph lc
X l ting n c hc
Khi ng h thng vkim tra cc vn sau: - Loi ting n
Cc trong kuKik Kik Kik..Tak Tak Tak
- Kim tra ma st gia trc mt chao v cnh vane- Dng mt theo di cnh vaneln , xung v kim tra cc tingn bt thng, xc nh nguyen
Thay th m t chao
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
98/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam98
- Ni pht ra ting n.
Cc trong kuShik Shik Shik
Dul Dul DulKim tra, v sinh li lc gi
Cc trong kuShak Shak Shak
Kim tra, sa cha ch un ngng
nhn v x l
Cc trong kuDul Dul Dul
Kim tra qut cc trong Khp ni/ V nan / Cc vt th l lm kt,chm, bi bn
iu chnh (khp ni) / Vsinh qut (Bn) / Thay th(V, gy)
Cc trong kuWoong~
Kim tra m t cc trong (nghe cm nhn)
Thay th m t
Cc ngoi kuWoong Woong
WoongKim tra rung ng ca my nn
-iu chnh gi treo cc ngoi-iu chnh cn bng ccngoi-iu chnh hoc lp b sungcc chn cao su gim chn
Cc ngoi ku
Ta Da Dak Kim tra qut gi cc ngoi Sa cha, thay th qut gi
Cc ngoi kuChi~ing
Kim tra rung ng ti cc gcvung cc ngoi
iu chnh gc, vn cht vt,dn thm cao su gim chn
- Ch : My nnchy trong tnh trngthiu hoc tha gau c th n hnbnh thng. Hych kim tra ga
LGEVN / SVC Dept.iu ha nhit gia dng (RAC) Hintng Ph lcKim tra my mt ngun
[Khng ngun]
Kim tramch in
ChyMch
Kim tra chpmch cun
ChpMch?
Kim tra uni r in
N N
(Khi cu ch
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
99/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam99
Khi cu chchy en
PCB
in? dy m tMch? ni, r in
Y
Kim trachpmchmy nn
ChpMch?
Thay th mynn v PCB (bo)
Y
N
Thay th mt cc trong
Y
Bnhthng?
o in pu vo caat-to-mat (CB)
Y
N
Kim tra, sa chaphn cp ngun(Yu cu bn cungcp in)
Kim tra cu chchnh ca PCB cctrong
Cu chNgt?
N
Kim tra,sa chaiu khin
t xa
(Khi cu chchy en)
Y
Chp dyR in?
Kim travaristor ngnmch
Ngnmch?
N
Thaythvaristor
Thay cuch
Y
Y
Sacha
N
[Hng iu khin t xa]
LGEVN / SVC Dept.iu ha nhit gia dng (RAC) Hintng Ph lcKim tra iu khin t xa
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
100/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam100
C mthanh?
Bt ngunNghe m thanhPick hoc Chit
N
N
Hng trc tip iukhin vo camera cain thoi di ng, nhnphm nu mn hnhin thoi sng ln thiu khin cn tt
Kim tra iu khin
iuKhinTt?
Sa cha, thayth iu khin
Mychy?
N
Kim tra, thay thpin ca iu khin
Vn hnh mybng nt chycng bcForceOperation
Ktthc
Y
YY
N
Thay th PCBcc trong
Kim tra dy in tDisplay PCB ti PCBcc trongKim tra thay th mtnhn (Display PCB)
Ktthc
Tham khoPhn mt
Ngun
LGEVN / SVC Dept.iu ha nhit Gai dng (RAC) Hintng Ph lcX l mi trong phng
Mi sn phm mi
Y Gii th h h i
Mi t mi
Thi gian Dec 2010
Thc hin bi
-
7/29/2019 RAC Standard Repair Process (2010)
101/103
Ti liu hun luyn k thut my lnh LG Electronics Viet Nam101
Mi do cc cht thm
(nc xt phng)
Mi do cc cht bn t lungy trong dn lnh
Mi xng ngc vo phngt ng nc thi
Mi t ni tht, keo dnsau khi xy dng
Thng gi
Sa cha, chuyn v trng nc thi
Thay th dn lnh
Y
N
Gii thch nguyn nhn vikhch hng
- V sinh dn lnh- H thp nhit ci txung 2~3 C
Y
N
- V sinh dn lnh- H thp nhit ci txung 2~3 C
Ktthc
Mi tdn lnh
Mi t miTrngs dng
LGEVN / SVC Dept.iu ha nhit Gia dng (RAC) Hintng
Ph lc
Tng quan cng sut my v phng
[Nng sut ca my v kch t