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Air-Conditioners For Building Application TECHNICAL & SERVICE MANUAL Model name <Indoor unit> Model name <Indoor unit> PEFY-P-NMHU-E2 Series PEFY 2013 INDOOR UNIT

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Page 1: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

Air-Conditioners For Building Application

TECHNICAL & SERVICE MANUAL

Model name<Indoor unit>Model name<Indoor unit>

PEFY-P-NMHU-E2

Series PEFY

2013

INDOOR UNIT

Page 2: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

2HWE12120

CONTENTSSAFETY PRECAUTIONS ············································································ 31. FEATURES ··························································································· 52. PART NAMES AND FUNCTIONS ······························································ 6

2-1. Indoor (Main) Unit ..................................................................................................................62-2. Remote controller...................................................................................................................6

3. SPECIFICATION ···················································································· 83-1. Specification...........................................................................................................................83-2. Electrical parts specifications .................................................................................................9

4. OUTLINES AND DIMENSIONS ································································105. WIRING DIAGRAM ················································································ 116. REFRIGERANT SYSTEM DIAGRAM ························································127. TROUBLESHOOTING ············································································13

7-1. How to check the parts ........................................................................................................137-2. Setting of address switch .....................................................................................................147-3. Setting of Dip-switch (at delivery) ........................................................................................157-4. Attention for test run .............................................................................................................157-5. Function the LED of the indoor unit service board ...............................................................15

8. DISASSEMBLY PROCEDURE ·································································168-1. Service panel .......................................................................................................................168-2. Control box...........................................................................................................................178-3. Fan .......................................................................................................................................198-4. LEV•Pipe thermistor .............................................................................................................208-5. Drain pump•Drain sensor .....................................................................................................218-6. Drain pan ............................................................................................................................228-7. Heat exchanger ...................................................................................................................23

Page 3: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

3HWE12120

SAFETY PRECAUTIONS

1. Before installation and electric work

Before installing the unit, make sure you read all the “Safety precautions”.

The “Safety precautions” provide very important points regarding safety. Make sure you follow them.

This equipment may cause the adverse effect on the same supply system.

Please report to or take consent by the supply authority before connection to the system.

Symbols used in the text Warning:

Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution:Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations: Indicates an action that must be avoided.: Indicates that important instructions must be followed.: Indicates a part which must be grounded.: Indicates that caution should be taken with rotating parts. (This

symbol is displayed on the main unit label.) <Color: Yellow>: Beware of electric shock (This symbol is displayed on the main

unit label.) <Color: Yellow>

Warning:Carefully read the labels affixed to the main unit.

Warning:•Ask the dealer or an authorized technician to install the air

conditioner.- Improper installation by the user may result in water leakage,

electric shock, or fire.•Install the air unit at a place that can withstand its weight.

- Inadequate strength may cause the unit to fall down, resulting in injuries.

•Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.- Inadequate connection and fastening may generate heat and

cause a fire.•Prepare for typhoons and other strong winds and earthquakes

and install the unit at the specified place.- Improper installation may cause the unit to topple and result in

injury.•Always use an air cleaner, humidifier, electric heater, and other

accessories specified by Mitsubishi Electric.- Ask an authorized technician to install the accessories. Improper

installation by the user may result in water leakage, electric shock, or fire.

•Never repair the unit. If the air conditioner must be repaired, consult the dealer.- If the unit is repaired improperly, water leakage, electric shock, or

fire may result.•Do not touch the heat exchanger fins.

- Improper handling may result in injury.•If refrigerant gas leaks during installation work, ventilate the

room.- If the refrigerant gas comes into contact with a flame, poisonous

gases will be released.

•Install the air conditioner according to this Installation Manual.- If the unit is installed improperly, water leakage, electric shock, or

fire may result.•Have all electric work done by a licensed electrician according

to “Electric Facility Engineering Standard” and “Interior Wire Regulations” and the instructions given in this manual and always use a special circuit.- If the power source capacity is inadequate or electric work is per-

formed improperly, electric shock and fire may result.•Keep the electric parts away from water (washing water etc.).

- It might result in electric shock, catching fire or smoke.•Securely install the cover of control box and the panel.

- If the cover and panel are not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result.

•When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant specified on the unit.- If a different refrigerant or air is mixed with the original refrigerant,

the refrigerant cycle may malfunction and the unit may be damaged.

•If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.- Consult the dealer regarding the appropriate measures to prevent

the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.

•When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.- If the air conditioner is installed improperly, water leakage, elec-

tric shock, or fire may result.•After completing installation work, make sure that refrigerant

gas is not leaking.- If the refrigerant gas leaks and is exposed to a fan heater, stove,

oven, or other heat source, it may generate noxious gases.•Do not reconstruct or change the settings of the protection

devices.- If the pressure switch, thermal switch, or other protection device is

shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

•To dispose of this product, consult your dealer.•Do not use a leak detection additive.

SAFETY PRECAUTIONS

Page 4: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

4HWE12120

SAFETY PRECAUTIONS

Warning:•Note the following when building a heater in the air

conditioning system.- Leave enough space between units for proper ventilation so that

the indoor unit temperature does not exceed 40°C when windless.- Keep the heater clean, and take appropriate measures so that

the indoor unit does not suck in the dust particles that accumulate on the heater.

- Use the optional heater cable (PAC-YU24HT) to perform an interlocked operation with indoor units.

- Do not build a heater inside the indoor unit.

Recommended circuit

FS1

FS2FS1

FS2

RS

RS

CN24

H288H

H188H

26H88H

Wiring diagram

1-phase powersupply208V, 230V/60Hz

Control board

FS1, 2 ----- Thermal fuseH1, H2 ----- Heater26H --------- Overheat protection

thermostat88H --------- Electromagnetic contactor

2. Precautions for devices that use R410A refrigerant

Caution:•Do not use the existing refrigerant piping.

- The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.

•Use refrigerant piping made of C1220 (Cu-DHP) phosphorus deoxidized copper as specified in the *JIS H3300 “Copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.- Contaminants on the inside of the refrigerant piping may cause

the refrigerant residual oil to deteriorate.* JIS: Japanese Industrial Standard

•Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)- If dust, dirt, or water enters the refrigerant cycle, deterioration of

the oil and compressor trouble may result.•Use ester oil, ether oil or alkylbenzene (small amount) as the

refrigerator oil to coat flares and flange connections.- The refrigerator oil will degrade if it is mixed with a large amount

of mineral oil.•Use liquid refrigerant to fill the system.

- If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.

•Do not use a refrigerant other than R410A.- If another refrigerant (R22, etc.) is used, the chlorine in the

refrigerant may cause the refrigerator oil to deteriorate.•Use a vacuum pump with a reverse flow check valve.

- The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

•Do not use the following tools that are used with conventional refrigerants. (Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment)- If the conventional refrigerant and refrigerator oil are mixed in the

R410A, the refrigerant may deteriorated.- If water is mixed in the R410A, the refrigerator oil may deteriorate.- Since R410A does not contain any chlorine, gas leak detectors

for conventional refrigerants will not react to it.•Do not use a charging cylinder.

- Using a charging cylinder may cause the refrigerant to deteriorate.•Be especially careful when managing the tools.

- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.

Page 5: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

5HWE12120

FEATURES

1. FEATURES[Series PEFY] Ceiling Concealed

Indoor unit

ModelsCooling capacity/Heating capacity

kW BTU / hPEFY-P15NMHU-E2PEFY-P18NMHU-E2PEFY-P24NMHU-E2PEFY-P27NMHU-E2PEFY-P30NMHU-E2PEFY-P36NMHU-E2PEFY-P48NMHU-E2PEFY-P54NMHU-E2

4.4 / 5.05.3 / 5.97.0 / 7.97.9 / 8.88.8 / 10.010.6 / 11.714.1 / 15.815.8 / 17.6

15000 / 1700018000 / 2000024000 / 2700027000 / 3000030000 / 3400036000 / 4000048000 / 5400054000 / 60000

Page 6: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

6HWE12120

PART NAMES AND FUNCTIONS-Indoor (Main) Unit

2. PART NAMES AND FUNCTIONS2-1. Indoor (Main) Unit

Air outlet

Air inlet

2-2. Remote controllerPAR-21MAA

Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

<1> Operation buttons

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION CLEAR

TEST

TEMP.

MENU

BACK DAYMONITOR/SET

CLOCK

ON/OFF

1

2

3

4d 5 6 8 9

0

c

a

b7

1 [Set Temperature] Button 5 [Louver] Button 0 [Test run] Button

2 [Timer Menu] Button [Operation] Button a [Filter] Button

[Monitor/Set] Button 6 [Fan Speed] Button [ ] Button

3 [Mode] Button 7 [Airflow Up/Down] Button b [ON/OFF] Button

[Return] Button 8 [Ventilation] Button c Position of built-in room temperature

4 [Timer On/Off] Button [Operation] Button d [Set Time] Button

[Set Day] Button 9 [Check/Clear] Button

• Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measurement of room temperature.

• Never place any obstacle around the lower right-hand section of the remote controller. Doing so can result in the erroneous measurement of room temperature.

Page 7: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

7HWE12120

PART NAMES AND FUNCTIONS-Remote controller

<2> Display

C

C

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

CHECK

CHECK MODEFILTER

TEST RUNFUNCTION

1Hr.

NOT AVAILABLESTAND BY DEFROST

TEMP.

M

FK

A P

B

C

E

DOLG NI H JQ

A Current time/Timer

B Centralized control

C Timer OFF

D Timer indicator

E Operation mode: COOL, DRY, AUTO, FAN, HEAT

F “Locked” indicator

G Set temperature

H Power ON

I Louver

J Ventilation

K Filter sign

L Set effective for 1 hr.

M Sensor position

N Room temperature

O Airflow

P Fan speed

Page 8: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

8HWE12120

SPECIFICATION-Specification

3. SPECIFICATION3-1. SpecificationPEFY-P-NMHU-E2

Model

Item

PEFY-P15NMHU-E2

PEFY-P18NMHU-E2

PEFY-P24NMHU-E2

PEFY-P27NMHU-E2

PEFY-P30NMHU-E2

Power sourse 208/230V, 60Hz

Capacity*1

CoolingkW 4.4 5.3 7.0 7.9 8.8

BTU/h 15000 18000 24000 27000 30000

HeatingkW 5.0 5.9 7.9 8.8 10.0

BTU/h 17000 20000 27000 30000 34000

Dimension

Heightmm 380

in 15

Widthmm 745 1030

in 29-6/16 40-9/16

Depthmm 900

in 35-7/16

Net weightkg 44 45 56

lb 98 100 124

FAN

Airflow rate(Low-High)

m3/min 10.0-14.0 10.0-14.0 13.5-19.0 15.5-22.0 18.0-25.0

cfm 353-494 353-494 477-671 547-777 636-883

External staticpressure *3 Pa

208V (100, 250)

230V (150), 250

Noise level (Low-High) *2 dB(A) 39-45 39-45 40-46 38-44 38-44

PEFY-P-NMHU-E2

Model

Item

PEFY-P36NMHU-E2

PEFY-P48NMHU-E2

PEFY-P54NMHU-E2

Power sourse 208/230V, 60Hz

Capacity*1

CoolingkW 10.6 14.1 15.8

BTU/h 36000 48000 54000

HeatingkW 11.7 15.8 17.6

BTU/h 40000 54000 60000

Dimension

Heightmm 380

in 15

Widthmm 1195

in 47-1/16

Depthmm 900

in 35-7/16

Net weightkg 69 71

lb 153 157

FAN

Airflow rate(Low-High)

m3/min 26.5-38.0 26.5-38.0 28.0-40.0

cfm 936-1342 936-1342 989-1412

External staticpressure *3 Pa

208V (100, 250)

230V (150), 250

Noise level (Low-High) *2 dB(A) 40-46 40-46 41-47

Notes: *1 Cooling/Heating capacity indicates the maximum value at operation under the following condition. Cooling: Indoor: 26.7 °C [80 °F] DB/19.4 °C [67 °F] WB Outdoor: 35 °C [95 °F] DB Heating: Indoor: 21.1 °C [70 °F] DB Outdoor: 8.3 °C [47 °F] DB/6.1 °C [43 °F] WB

*2 The operating noise is the data that was obtained in an anechoic room.*3 Factory settings: Power supply voltage 230 V

External static pressure 250 Pa

Page 9: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

9HWE12120

SPECIFICATION-Electrical parts specifications

3-2. Electrical parts specificationsModel

Parts nameSymbol

PEFY- P15

NMHU-E2

PEFY- P18

NMHU-E2

PEFY- P24

NMHU-E2

PEFY- P27

NMHU-E2

PEFY- P30

NMHU-E2

PEFY- P36

NMHU-E2

PEFY- P48

NMHU-E2

PEFY- P54

NMHU-E2

Tranrsformer T (Primary) 50/60Hz 220-240V (Secondry) (23.5V 0.9A)

Room temperature thermistor TH21 Resistance 0°C [32°F]/15kΩ, 10°C [50°F]/9.6kΩ, 20°C [68°F]/6.3kΩ, 25°C [77°F]/5.4kΩ,

30°C [86°F]/4.3kΩ, 40°C [104°F]/3.0kΩ

Liquid pipe thermistor TH22 Resistance 0°C [32°F]/15kΩ, 10°C [50°F]/9.6kΩ, 20°C [68°F]/6.3kΩ, 25°C [77°F]/5.4kΩ,

30°C [86°F]/4.3kΩ, 40°C [104°F]/3.0kΩ

Gas pipe thermistor TH23 Resistance 0°C [32°F]/15kΩ, 10°C [50°F]/9.6kΩ, 20°C [68°F]/6.3kΩ, 25°C [77°F]/5.4kΩ, 30°C [86°F]/4.3kΩ, 40°C [104°F]/3.0kΩ

Fuse(Indoor controller board)

FUSE 250V 6.3A

Fan motor(with Innerthermostat)

MF1, 24-pole

Output130W NC-45VMS

4-pole Output130W NC-45VMS

4-pole Output180W NC-71VMS

4-pole Output190W NC-90VMS-W

4-pole Output190W NC-90VMS-W

4-pole Output400W NC-112VMS-W

4-pole Output400W NC-112VMS-W

4-pole Output400W NC-112VMS-W

Innerthermostat(Fan motor) OFF 135ºC ±5ºC ON 86ºC ±15ºC

Fan motor capacitor C1 4μF×440V 4μF×440V 5μF×440V 8μF×440V 10μF×440V 11μF×440V 11μF×440V 11μF×440V

Linear expansion valve LEV

DC12V Stepping motor drive port dimension ø 3.2

( 0~1800pulse <at R410A outdoor unit> 0~2000pulse <at the other outdoor unit>)

DC12V Stepping motor drive port dimension ø 5.2

( 0~1800pulse <at R410A outdoor unit> 0~2000pulse <at the other outdoor unit>)

DC12V Stepping motor drive port dimension ø 6.4( 0~1800pulse <at R410A outdoor unit> 0~2000pulse <at the other outdoor unit>)

Power supply terminal bed TB2 (L1, L2, G) 250V 20A

Transmission terminal bed

TB5 (M1, M2, S) 250V 20A

TB15 (1, 2) 250V 15A

Drain pump DP

Disconnect the connector, and measure the resistance using a tester. (Ambient temp.: 20ºC)

Normal Abnormal

399Ω Open or short circuit

Drain sensor DS0°C/6.0kΩ,10°C/3.9kΩ20°C/2.6kΩ,25°C/2.2kΩ30°C/1.8kΩ,40°C/1.3kΩ

Page 10: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

10HWE12120

OUTLINES AND DIMENSIONS

4. OUTLINES AND DIMENSIONSPEFY-P15·18·24·27·30·36·48·54NMHU-E2

Unit :mm(in.)

DE

GH

FA

CB

ø6.3

5ø1

2.7

ø9.5

2ø1

5.88

1085

1250

PEFY

-P27

∙30N

MH

U-E

2

PEFY

-P36

∙48∙

54N

MH

U-E

2

(31-

1/2)

(42-

3/4)

(49-

1/4)

1039

1204

754

(29-

11/1

6)

(40-

15/1

6)

(47-

7/16

)

965

1130

680

(38)

(44-

1/2)

885

1050

600

(23-

5/8)

(34-

7/8)

(41-

3/8)

835

1000

550

(21-

11/1

6)

(32-

7/8)

(39-

3/8)

42.5 2550 (2)

(1-1

1/16

)

(1)

17 2111

800

1000

(19-

11/1

6)

(31-

1/2)

(39-

3/8)

(1/4

)

(3/8

)70

0

900

(17-

3/4)

(27-

9/16

)

(35-

7/16

)

J

67 5050 (2)

(2-1

1/16

)

(2)L

K

(26-

13/1

6)80

0

15 191050

045

0(1

/2)

(5/8

)

PEFY

-P24

NM

HU

-E2

PEFY

-P15

∙18N

MH

U-E

2

Not

e 1.

Use

an

M10

scr

ew fo

r the

sus

pens

ion

bolt

(fiel

d su

pply

).

2. K

eep

the

serv

ice

spac

e fo

r the

mai

nten

ance

from

the

botto

m

w

hen

the

heat

exc

hang

er is

cle

aned

.

3. T

his

draw

ing

is fo

r PE

FY-P

27∙3

0∙36

∙48∙

54N

MH

U-E

2 m

odel

s,

w

hich

hav

e 2

fans

.PE

FY-P

15∙1

8∙24

NM

HU

-E2

mod

els

have

1 fa

n.

4. M

ake

sure

to in

stal

l the

air

filte

r (fie

ld s

uppl

y) o

n th

e ai

r int

ake

side

.

In

cas

e fie

ld s

uppl

ied

air f

ilter

is u

sed,

atta

ch it

whe

re th

e fil

ter s

ervi

ce is

eas

ily d

one.

Air i

nlet

Air o

utle

t

Mod

el

Gas

pip

e1

L

iqui

d pi

pe2

2×5-

ø3(1

/8) h

oles

15(5

/8)

L

50(2)

50x(J-1)=K (2x(J-1)=K)

23(15/16)B(Suspension bolt pitch)

A

60(2

-3/8

)81

4(32

-1/1

6)

904(

35-5

/8)

15(5

/8)

29(1

-3/1

6)

900(

35-7

/16)

24(1

)84

7(33

-3/8

)

10(7

/16)

41

E(Duct)

94(3

-3/4

)25

0(9-

7/8)

2×J-

ø3(1

/8) h

oles

14358

25(1)50x4=200

50(2)

326.5(12-7/8)

6918

7

180

164.

5

432(

17-1

/16)

50(2)

45(1-13/16)50x5=250

380(15)

F

50(2)

40(1-5/8)

65(2-9/16)C

50x(G-1)=H (2x(G-1)=H)

10(7

/16)

16(1

1/16

)34

0(13

-7/1

6)

D(Duct)

(Duc

t)

Sus

pens

ion

bolt

hole

(Sus

pens

ion

bolt

pitc

h)

80(3-3/16)

(2x4=7-7/8)

(2-3

/4)

(7-1

/8)

(6-1

/2)

4-14

×30(

9/16

x1-3

/16)

Slo

t2×

G-ø

3(1/

8) h

oles

(7-3

/8)

(Duc

t)

(2-5/16)

Term

inal

blo

ck

Term

inal

box

(Pow

er s

ourc

e)

Con

trol b

oxD

rain

pum

p

Dra

in p

ipe

braz

ing

conn

ectio

n (g

as)

Term

inal

blo

ck

(2x5=9-7/8)

Dra

in p

ipe

Dra

in p

ipe

(O.D

.Ø32

(1-1

/4))

2×6-

ø3(1

/8) h

oles

braz

ing

conn

ectio

n (li

quid

)

(O.D

.ø32

(1-1

/4))

(5-11/16)

(1-5/8)

(Em

erge

ncy

drai

n)(O

.D.ø

32(1

-1/4

))(G

ravi

ty d

rain

)

62(2-1/2)

115(4-9/16)

44.5(1-13/16)

115(4-9/16)

(Tra

nsm

issi

on)

Term

inal

blo

ck

29

34(1-3/8)

(1-3/16)

700(27-9/16) Max

300(

11-1

3/16

) or l

ess

(Act

ual l

engt

h)

Dra

in h

ose

<Acc

esso

ry>

(I.D

.ø32

(1-1

/4))

0 -10

65

(2-9

/16

)

-7/1

6 0

20(13/16) or more 20(13/16) or more

Acc

ess

door

Cei

ling

surfa

ce

Mak

e th

e ac

cess

doo

r at t

he a

ppoi

nted

pos

ition

pro

perly

fo

r ser

vice

mai

nten

ance

.

Note2

50(2

)50

(2)

M

625(

24-5

/8)

450(1

7-3/4)

100~

200(

3-15

/16~

7-7/

8)

150~

200(

5-15

/16~

7-7/

8)

700(

27-9

/16)

450(

17-3

/4)Ac

cess

doo

r

1065

1230

PEFY

-P27

∙30N

MHU

-E2

PEFY

-P36

∙48∙

54NM

HU-E

2

(30-

3/4)

(4-1

5/16

)

(48-

7/16

)

780

Mod

el

Req

uire

d sp

ace

for s

ervi

ce a

nd m

aint

enan

ce.

MPE

FY-P

15∙1

8∙24

NMHU

-E2

R

efrig

eran

t pip

ing

1 R

efrig

eran

t pip

ing

2

Page 11: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

11HWE12120

WIRING DIAGRAM

5. WIRING DIAGRAMPEFY-P15·18·24·27·30·36·48·54NMHU-E2

M 1~

F1 AC25

0V

CN

31

C

*inse

rt

DSt°

2

54

32

DP

65

43

23

2

(Blu

e)

31

(Red

)

G

PO

WE

R S

UP

PLY

AC

208

V/2

30V

60

Hz

3

33

4

44

56

8

88

9

99

T

CN

54C

N70

2 1M1

S(S

HIE

LD)

M2 TB

15

TO O

UTD

OO

R U

NIT

B

C C

ON

TRO

LLE

R

RE

MO

TE C

ON

TRO

LLE

R

TB5

TO M

A R

EM

OTE

CO

NTR

OLL

ER

t°TH

21

t° t°TH

23

INSI

DE

SEC

TIO

N O

F C

ON

TRO

L BO

X

X01

LEV

M

1~

54

32

6

S.B

.

DSA1ZN

R1

UC

N1

1 3(Y

ello

w)

X06

X04

X05

LED

2

LED

1

CN

62C

N82

1

23 4 5 678

0

8 7

65

432

1

1

0

14

32

TB2

(Yel

low

)

1

11

CN

51

8

88

1

I.B.

9

99

SW

2S

W3

15

CN

418

U

1

1 1C

N42

CN

32

CN

52

1C

N60

5S

W4

4

91

TH22

12

CN

211

CN

3A

2 3

3 1

45

6

7890

9ABCDEF

31

CN

3T

A.B

.

SW

11

13

2

(Red

)

4

75

31

MF

CN

D(R

ed)

53

13

1

11

1

2

CN

29

54

3(R

ed)

2

SW

7

76

(Gre

en)

(Bla

ck)

8

(Blu

e)

(Blu

e)C

NT

CN

2M1

SW

1

2

13

24

CN

81

56

7

(Red

)

2

31

3

(Blu

e)(R

ed)

CN

27(R

ed)

12

M

CN

P1

3

33

65

4

3

L2L1

SWA

SWC

OFF

2

ON

SW5

SW

E2

2

CN

20

1

1

(Gre

en)

(Yel

low

)

CN

22

CN

24

()

(BRA

NCH

No.)

(1s

digi

t)S

W12

SW

14

6.3A T

ZNR

(10t

hs d

igit)

PAR

TS L

OC

ATIO

N

NA

ME

SY

MB

OL

CN

52C

N51

CN

41C

N32

CN

27C

N24

CN

22S

WE

(I.B

.)S

WC

(A.B

.)S

WA

(A.B

.)S

W7(

A.B

.)S

W5(

A.B

.)S

W4(

I.B.)

SW

3(I.B

.)S

W2(

I.B.)

SW

1(A

.B.)

SW

14(A

.B.)

SW

12(A

.B.)

SW

11(A

.B.)

TH23

TH22

TH21

LEV

X01,

X04~

X06

CDS

DPT

DS

A1

ZNR

,ZN

R1

F1TB15

TB5

TB2

S.B

.A

.B.

I.B.

MF

SY

MB

OL

EX

PLA

NAT

ION

SYM

BOL

LED

ope

ratio

n un

der n

orm

al s

tate

At a

pply

ing

mai

n po

wer

sou

rce

→ L

ight

ing

LED

1A

t rec

eivi

ng M

A tra

nsm

issi

on p

ower

sou

rce

→ L

ight

ing

LED

2

OPER

ATIO

N OF

LED

FOR

INDO

OR C

IRCU

IT B

OARD

SER

VICE

208V

250

Pa

230V

250

Pa

208V

100

Pa/

230V

150

Pa

Volta

ge,

Ext

erna

l sta

tic p

ress

ure

Conn

ecto

r

Whi

teB

lue

Red

Con

nect

or (R

emot

e in

dica

tion)

Con

nect

or (C

entra

lly c

ontro

l)C

onne

ctor

(HA

term

inal

-A)

Con

nect

or (R

emot

e sw

itch)

Con

nect

or (D

ampe

r)C

onne

ctor

(Hea

ter)

Con

nect

or (F

an c

ontro

l) C

onne

ctor

(em

erge

ncy

oper

atio

n)S

witc

h(fo

r mod

el s

elec

tion)

Sw

itch(

for m

odel

sel

ectio

n)S

witc

h(fo

r mod

el s

elec

tion)

Sw

itch(

for m

odel

sel

ectio

n)S

witc

h(fo

r mod

el s

elec

tion)

Sw

itch(

for m

ode

sele

ctio

n)S

witc

h(fo

r cap

acity

cod

e)S

witc

h(fo

r mod

e se

lect

ion)

Sw

itch

(BR

AN

CH

No.

set)

Sw

itch

(10t

hs d

igit

addr

ess

set)

Sw

itch

(1s

digi

t add

ress

set

)Th

erm

isto

r (pi

ping

tem

p.de

tect

ion/

gas)

Ther

mis

tor (

pipi

ng te

mp.

dete

ctio

n/liq

uid)

Ther

mis

tor (

inle

t air

tem

p.de

tect

ion)

Ele

ctro

nic

linea

r exp

an. v

alve

Aux

. rel

ayC

apac

itor

Dra

in s

enso

rD

rain

pum

pTr

ansf

orm

erA

rres

ter

Varis

tor

Fuse

AC

250V

6.3

A T

Tran

smis

sion

term

inal

blo

ckTr

ansm

issi

on te

rmin

al b

lock

Pow

er s

ourc

e te

rmin

al b

lock

Sur

ge a

bsor

ber b

oard

Add

ress

boa

rdIn

door

con

trolle

r boa

rdFa

n m

otor

NO

TE : 1

. Sym

bols

use

d in

wiri

ng d

iagr

am a

bove

are

,

:Con

nect

or,

:T

erm

inal

,

(H

eavy

dot

ted

line)

:Fie

ld w

iring

2

. To

perfo

rm a

dra

inag

e te

st fo

r the

dra

in p

ump

turn

on

the

SW

E

on

the

cont

rol b

oard

whi

le th

e in

door

uni

t is

bein

g po

wer

d.

Be

sure

to tu

rn o

ff th

e S

WE

afte

r com

plet

ing

a dr

aina

ge te

st o

r tes

t run

.

3. U

se c

oppe

r sup

ply

wire

.

C

S.B

.

I.B.

TB15 TB

5

T

TB2

A.B

.CO

NTRO

L BOX

Page 12: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

12HWE12120

REFRIGERANT SYSTEM DIAGRAM

6. REFRIGERANT SYSTEM DIAGRAM

Strainer (#100-mesh)

Built-in strainers (#100-mesh and #50-mesh)

Heat exchanger

Room temperature thermistor TH21

Gas pipe thermistor TH23

Liquid pipe thermistor TH22

Linear expansion valve

Gas pipe

Brazed connection

mm <in.>

CapacityItem PEFY-P15,18NMHU-E2 PEFY-P24,27,30NMHU-E2 PEFY-P36,48,54NMHU-E2

Gas pipe ø 12.7 (1/2) ø 15.88 (5/8)Liquid pipe ø 6.35 (1/4) ø 9.52 (3/8)

Page 13: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

13HWE12120

TROUBLESHOOTING-How to check the parts

7. TROUBLESHOOTING7-1. How to check the parts

Parts name Check pointsRoom temperature thermistor (TH21)Liquid pipe thermistor (TH22)Gas pipe thermistor (TH23)

Disconnect the connector, then measure the resistance using a tester.(Sorrounding temperature 10°C~30°C [50°F~86°F])

Normal Abnormal (Refer to the <Thermistor characteristic graph>)4.3kΩ~9.6kΩ Open or short

TransformerCNT

3T13

CN3TDisconnect the connector and measure the resistance using a tester.

Normal AbnormalCNT(1)-(3) App.15Ω

Open or shortCN3T(1)-(3) App.4Ω

Fan motor PEFY-P15~54

Relay connector A…OrangeB…BlueC…RedD…BrownE…BlackF…Gray

Thermal protector Capacitor

BDE

A

L1

F C CP

B FD A EC C

L2 L3

M A

Measure the resistance between the terminals using a tester. (at 20°C [68°F])

Unit :ΩMotor terminal

orRelay connector

NormalAbnormal

PEFY-P15,18 PEFY-P24 PEFY-P27,30 PEFY-P36,48,54

M 30.9 24.6 24.0 6.26

Open or shortA 46.9 34.7 29.1 8.19L1 4.08 2.81 2.94 0.740L2 8.95 4.03 3.56 0.741L3 7.77 6.06 4.35 2.07

Linear expansion valve

123456

LEV

White

YellowOrange

BlueRed

Brown

CN60Disconnect the connector then measure the resistance valve using a tester.

Normal Abnormal(1)-(5)

White-Red(2)-(6)

Yellow-Brown(3)-(5)

Orange-Red(4)-(6)

Blue-Brown Open or short200Ω ±10%

Drain Pump (Drain water lift up kit)

1

3

Red

Red

Disconnect the connector then measure the resistance valve using a tester.(Sorrounding temperature 20°C~30°C [68°F~86°F])

Normal Abnormal399Ω Open or short

<Thermistor characteristic graph>Room temperature thermistor (TH21)Liquid pipe thermistor (TH22)Gas pipe temperature thermistor (TH23)Drain sensor (DS)Thermistor R0=15kΩ ± 3%Fixed number of B=3480kΩ ± 2%Rt=15exp 3480 ( 1

273+t − 1273 )

0°C 32°F 15kΩ10°C 50°F 9.6kΩ20°C 68°F 6.3kΩ25°C 77°F 5.2kΩ30°C 86°F 4.3kΩ40°C 104°F 3.0kΩ

0

10

20

30

40

50

-20 -10 0 10 20 30 40 50

Temperature

(˚C)-4 14 32 50 68 86 104 122 [˚F]

Res

ista

nce

(KΩ

)

Drain sensor (Drain water lift up kit)

13

Measure the resistance between the terminals using a tester. (Refer to the <Thermistor characteristic graph>)

0°C/6.0kΩ, 10°C/3.9kΩ20°C/2.6kΩ, 25°C/2.2kΩ30°C/1.8kΩ, 40°C/1.3kΩ

Page 14: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

14HWE12120

TROUBLESHOOTING-Setting of address switch

7-2. Setting of address switchMake sure that power source is turning off.

ONOFF

1 2 3 4 5 6 7 8 9 10

SW1

Indoor unit control board

< At delivery (All models)>

SW2 SW3

CN62

SW1

SW7

ON

ONON

W254665G06JP2

SW14

FP-AD-R

CN82 68 1 1

240V

220V

1

1

0 1 12

AS

SY

2

3 4 5 6 7 8 9 1021

3 4 5 6 7 8 9

G 2 3

1

1O F F

2 3

3

A B C D E F

10JP1

SW5SWCSWA

1

32

SW12 SW110123456789AB

CD

EF 0 1 23

45678

9 0 1 23

45678

9

ONOFF

1 2 543

SW 4

SW4

<1> In case using M-NET remote controller, address is set by rotary switches. (SW11,SW12)* It is not necessary setting address in case of using unit remote controller.

Indoor unit do not run without address setting in field.

<2> Indoor unit address setting rule is different by each field work. Refer to install manual of outdoor unit , operate the address setting.

<3> Setting the address is combination of SW11 (1st digit address setting) and SW12 (2nd digit address setting).

Address “3” setting is composed SW11 “3” and SW12 “0”.Address “25” setting is composed SW11 “5” and SW12 “2”.

Page 15: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

15HWE12120

TROUBLESHOOTING-Setting of Dip-switch (at delivery)

7-3. Setting of Dip-switch (at delivery)

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 910 1 2 31 2 3 4 5 6

SW1 SW2ONOFF

ONOFF

ONOFF

ONOFF

SW3 SW4

5

ONOFF

220V240V

SW5

1 2 3

SW4

5

1 2 3

SW4

5

1 2 3

SW4

5

1 2 3

SW4

5

1 2 3

SW4

5

1 2 3

SW4

5

1 2 3

SW4

5

PEFY-P15NMHU-E2

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6

ONOFF

220V240V

SW5PEFY-P18NMHU-E2

SW1 SW2ONOFF

ONOFF

ONOFF

ONOFF

SW3

SWA1

SWCStandard

“標準”Indicate

Models Dip-SW

ONOFF

220V240V

SW5PEFY-P27NMHU-E2

SW1 SW2ONOFF

ONOFF

ONOFF

ONOFF

SW3

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6ONOFF

220V240V

SW5PEFY-P24NMHU-E2

SW1 SW2ONOFF

ONOFF

ONOFF

ONOFF

SW3

ONOFF

220V240V

SW5PEFY-P36NMHU-E2

SW1 SW2ONOFF

ONOFF

ONOFF

ONOFF

SW3

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6

ONOFF

220V240V

SW5PEFY-P48NMHU-E2

SW1 SW2ONOFF

ONOFF

ONOFF

ONOFF

SW3

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6

ONOFF

220V240V

SW5PEFY-P54NMHU-E2

SW1ONOFF

SW2ONOFF

ONOFF

SW3ONOFF

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6

4

4

4

4

4

4

4

4

1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6

ONOFF

220V240V

SW5PEFY-P30NMHU-E2

SW1 SW2ONOFF

ONOFF

ONOFF

ONOFF

SW3

1 2 3

ONOFF

SW7

1 2 3

ONOFF

SW7

1 2 3

ONOFF

SW7

1 2 3

ONOFF

SW7

1 2 3

ONOFF

SW7

1 2 3

ONOFF

SW7

1 2 3

ONOFF

SW7

1 2 3

ONOFF

SW7

7-4. Attention for test run Check that the drain-up mechanism is working properly, that no water is leaking from pipe connections, and that the fan is

operating.• For new installation, check the above items before completing ceiling work.

(1) Remove the cover from the water supply inlet on the indoor unit pipe.

(2) Insert the end of the pump or the tank into the drain pump. (Water may leak if it is not inserted properly.) Then, fill the water supply pump from a water supply tank.

(3) Perform a test run in the Cooling mode, or connect the connector to the ON-side of the SWE on the indoor unit control board. (The drain pump and the fan will be forced into operation without being started from the remote controller.)

SWE SWE

OFF ON OFF ON

Connector

<OFF> <ON>

(4) Check for normal operation, stop the test run, and shut off the main power. Disconnect the connector that is connected to the ON-side of SWE, if applicable. Connect it to the OFF-side, and then replace the cover to the water supply inlet as it was.

SWE SWE

OFF ON ONOFF

Connector

<ON> <OFF>

7-5. Function the LED of the indoor unit service boardSymbol LED operation under normal stateLED1 At applying main power source LightingLED2 At receiving MA transmission power source Lighting

Page 16: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

16HWE12120

DISASSEMBLY PROCEDURE-Service panel

8. DISASSEMBLY PROCEDURE8-1. Service panel

Procedures Explanatory figure1. Removing the service panel 1 (Figure 1-1)

(1) Remove the four service panel 1 mounting screws.

2. Removing the service panels 2 and 3 (Figure 1-2)(1) Remove the five service panel 3 mounting screws.(2) Remove the two service panel 2 mounting screws.

Service panel 1

Service panel 2

Service panel 3

Figure 1-1

Figure 1-2

Page 17: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

17HWE12120

DISASSEMBLY PROCEDURE-Control box

8-2. Control boxProcedures Explanatory figure

1. Removing the control cover (Figure 2-1)(1) Remove the two control box cover mounting screws.(2) Remove the two terminal block cover mounting screws.

* The above procedures will allow for the following services to be performed.

1 Operation and checking of the following switches on the address board of the control boardRotary switch SW11,12 Address settingRotary switch SW14 Port settingDip switch SW1 Function setting 1Dip switch SW2 Capacity settingDip switch SW3 Function setting 2Dip switch SW4 Function settingDip switch SW7 Function settingJumper pin SWE Test runDip switch SWA,SWC Option setting

2 Checking of the wiring connections to the control box (see below) and the field-installed wiringPower wire (Field-connected)Indoor-outdoor transmission line (Field-connected)Remote controller wiring (Field-connected)LEV wiring (Factory-connected)Drain pump wiring (Factory-connected)Drain sensor wiring (Factory-connected)Fan motor wiring (Factory-connected)Indoor temperature thermistor wiring

(Factory-connected)

Liquid pipe temperature thermistor wiring

(Factory-connected)

Gas pipe temperature thermistor wiring

(Factory-connected)

3Replacement of control board

4Replacement of address board

5Replacement of DSA board

6Replacement of capacitor

7Replacement of power supply transformer

8Replacement of fuse

Terminal block cover

Control box cover

Figure 2-1

Control box

Figure 2-2

Page 18: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

18HWE12120

DISASSEMBLY PROCEDURE-Control box

Procedures Explanatory figure2. Removing the control box (Figure 2-2)

(1) Disconnect the wiring from the control board and the relay connectors.

LEV1 wiring CN60•6P•White

Fan motor wiringRelay connector• 9P•White

Indoor temperature thermistor wiring CN20•2P•Red

Liquid pipe temperature thermistor wiring CN21•2P•White

Gas pipe temperature thermistor wiring CN29•2P•Black

Drain pump wiringRelay connector• 3P•White

Drain sensor wiring CN31•3P•White

(2) Remove the two control box mounting screws.

Page 19: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

19HWE12120

DISASSEMBLY PROCEDURE-Fan

8-3. FanProcedures Explanatory figure

1. Remove the control box and its cover according to the procedures detailed in section 8-2. Control box (page17).

2. Removing the fanP45-71 models (Figures 3-1 and 3-2)(1) Remove the four motor base mounting screws.(2) Loosen the three bellmouth mounting screws, and remove

the bellmouth.(3) Pull out the fan along the guide rail.*Use caution not to pinch the wiring.*Motor is heavy. Use caution to avoid injuries.

P80-160 models (Figures 3-3, 3-4, and 3-5)(1) Loosen the three front bellmouth mounting screws, and

remove the bellmouth.(2) Loosen the sirocco fan set screws, and remove the

sirocco fan.(3) Remove the three front fan case mounting screws.(4) Remove the four motor base mounting screws.(5) Loosen the three back bellmouth, and remove the

bellmouth.(6) Pull out the fan along the guide rail.*Use caution not to pinch the wiring.*Motor is heavy. Use caution to avoid injuries.

Motor base

Motor

Bellmouth

Sirocco fan

Figure 3-1

Figure 3-2

Sirocco fan

BellmouthMotor base

Motor

Fan case

Bellmouth

Set screw

Figure 3-3

Figure 3-4

Figure 3-5

Sirocco fan

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20HWE12120

DISASSEMBLY PROCEDURE-LEV•Pipe thermistor

8-4. LEV•PipethermistorProcedures Explanatory figure

1. Remove the service panel according to the procedures detailed in section 8-1. Service panel (page16).

2. Remove the control box cover according to the procedures detailed in section 8-2. Control box (page17).

3. Removing the LEV (Figure 4-1)(1) Disconnect connector CN60 from the control board.(2) Remove the drive motor using two spanners.(3) To remove the valving element, first take the

first four steps in section 8-7. Heat exchanger (page23) to remove the plastic cover. Be sure to protect the surrounding parts, such as insulation and wiring, from flame.

4. Removing the pipe thermistor (Figure 4-2)(1) Disconnect connectors CN21 and CN29 from the

control board.(2) Take the pipe thermistor out of the holder.

Liquid pipe temperature thermistor

Gas pipe temperature thermistor

LEV

Figure 4-1

Figure 4-2

Drive motor

Valving element

Thermistor position listP45

modelP50

modelP71

modelP80

modelP90

modelP112 model

P140 model

P160 model

Liquid pipe temperature thermistor

4th path 7th path 8th path5th

path

Gas pipe temperature thermistor

3rd path 4.5th path3rd path

7th path

4th path

Page 21: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

21HWE12120

DISASSEMBLY PROCEDURE-Drain pump•Drain sensor

8-5. Drainpump•DrainsensorProcedures Explanatory figure

1. Remove the service panels 2 and 3 according to the procedures detailed in section 8-1. Service panel (page16).

2. Remove the control box cover according to the procedures detailed in section 8-2. Control box (page17).

3. Disconnect the drain pump relay connector (CN31: white) from the control board.

4. Removing the drain pump assembly (Figure 5-1)(1) Remove the two drain pump mounting screws.

5. Removing the drain pump and drain sensor (Figure 5-2)(1) Remove the two drain pump cover sheet metal

mounting screws.(2) Remove the three drain pump mounting screws.(3) Pull the drain sensor out of the drain pump cover

sheet metal.

Drain pump assemblyFigure 5-1

Figure 5-2

Pump cover sheet metal

Drain sensor

Drain pump

Page 22: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

22HWE12120

DISASSEMBLY PROCEDURE-Drain pan

8-6. Drain pan Procedures Explanatory figure

1. Remove the cap from the service panel 3, and check the drain pan for water.Drain water from the drain port if there is any.

*Protect the surroundings with a plastic sheet before draining water.

2. Removing the drain pan (Figure 6-1)(1) Remove the 12 mounting screws from base plate A.(2) Pull down the drain pan. Loosening the mounting screw

on base plate B will make it easy to remove base plate A.*Pull out the drain pan by pulling a little in all directions. Drain pan is made of styrofoam. Handle the drain pan carefully so as not to break it.

Base plate A

Base plate B

Drain pan

Figure 6-1

Page 23: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

23HWE12120

DISASSEMBLY PROCEDURE-Heat exchanger

8-7. Heat exchanger Procedures Explanatory figure

1. Remove the LEV and pipe sensor wiring according to the procedures detailed in section 8-4. LEV•Pipe thermistor (page20).

2. Remove the drain pump according to the procedures detailed in section 8-5. Drain pump•Drain sensor (page21).

3. Remove the drain pan according to the procedures detailed in section 8-6. Drain pan (page22).

4. Removing the plastic cover (Figure 7-1)(1) Remove the plastic cover mounting screw from the

outside of the unit, and another mounting screw from inside the unit.

(2) Unhook the plastic cover from the heat exchanger panel.

5. Removing the heat exchanger (Figure 7-2)(1) Remove the two air baffle plate mounting screws.(2) Remove the four heat exchanger mounting screws,

and lower the heat exchanger.

Plastic coverHeat exchanger panel

Figure 7-2

Figure 7-1

Air baffle plate Heat exchanger

Page 24: TECHNICAL & SERVICE MANUAL...HWE12120 8 SPECIFICATION-Specification 3. SPECIFICATION 3-1. Specification PEFY-P-NMHU-E2 Model Item PEFY-P15NMHU-E2 PEFY-P18NMHU-E2 PEFY-P24NMHU-E2 PEFY-P27NMHU-E2

New publication, effective Oct. 2013Specifications subject to change without notice

Issued in Oct. 2013 HWE12120Printed in Japan

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN