commercial air conditioning solutions - miraco.com.eg · page 3 of 23 3. installation of smart link...
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Page 0 of 23
Commercial Air Conditioning Solutions
2019 / 2020
Smart Link
LCD Wired Controller
Air Cooled
50UB Vertical Packaged Systems
40AB / 38BB Split Systems
INSTALLATION & OPERATION MANUAL
Page 1 of 23
1. Description, Application and Features of Smart Link LCD Wired Controller
1.1 Description
LCD Smart link wired controller is a sequential controller suitable to be used for Air cooled split
and vertical packaged commercial systems for both cooling only and cooling with electric heaters
models
1.2 Application:
➢ Compressor system (Selectable) : 1 – 2 individual circuits ( stages )
➢ Electric heater (Selectable) : 2 stages with enable / disable selection.
➢ RS-485 port (For Modbus BMS control)
1.3 Features
➢ Operation Mode Selection Cool – Heat – Fan Only – Dry
➢ Indoor Blower Speed Selection : Single Speed
➢ Key Lock function
➢ Temperature setting 16 ~ 30 °C
➢ Time & Date Setting : Days, AM, PM
➢ Timer ON / OFF
➢ Auto restart function with backup memory.
When the power failure is happened during the air conditioner operation, the microprocessor of
the printed circuit board will memorize the operation setting. After the power is recovered, the
air conditioner operates automatically ( without remote control after elapse of compressor time
delay ), according to the previous operation settings.
➢ Various Temperature Readings Display
➢ Self Diagnostic Error Code Display
➢ Heater & Compressor Operation Status Display
➢ Sequential control and balance loading (with up to 2 compressors) for sizes 110-145-190-250-300
➢ Display and show compressors operation loading sequence.
➢ Can be connected to Building Management System BMS ( Modbus Protocol ) through RS-485
connection port ( From the main PCB ).
1.4 All control parameters are preset with default value and protected with password to prevent
unauthorized access.
Page 2 of 23
2. Dimensions of Smart Link LCD Wired Controller
Dimensions (mm)
Page 3 of 23
3. Installation of Smart Link LCD Wired Controller
SAFETY PRECAUTION
• Read the safety precautions carefully before installing the wired controller.
• Stated below are important safety issues that must be obeyed.
• Confirm there is no abnormal phenomena during test operation after complete the installation.
• Meaning of marks :
WARNING Means improper handling may lead to personal death or severe injury.
CAUTION Means improper handling may lead to personal injury or property loss.
WARNING
• Please entrust the distributor or professionals to install the wired controller. Installation by other persons may lead to imperfect installation, electric shock or fire.
• Reinstallation must be performed by professionals.
• Improper installation may lead to electric shock or fire.
• A random installation may cause abnormal operation, electric shock or fire.
CAUTION
• Do not install the wired controller in a place vulnerable to leakage of flammable gases.
• Only use standard cabels provided with the unit to connect the sensors ( for split units ) and wired control.
OTHER PRECAUTIONS FOR WIRED CONTROLLER
Installation Location :
Do not install the wired controller in a place with much oil, steam, sulfide gas. Otherwise, the product may deform and fail.
Notes to installation of wired controller :
1. Circuit of Wired Controller is low voltage circuit. Never connect it with a standard 220V/380V circuit or put it into a same Wiring Tube with the circuit.
2. The connective cable of wired controller should not be longer than 30 meters.
Page 4 of 23
4. Accessories
Standard Accessories Supplied from The Factory
DESCREPTION QTY SHAPE USE
Wired Room Controller 1
To operate the air conditioner used with indoor unit
Cable connections of Wired Room Controller
1
4-core Shield Cable with 7.5 meters to connect the wired control to PCB
1
4-core Shield Cable with 30 meters to connect the wired control to PCB
Connections Cables for Sensors ( supplied with evaporator unit )
▪ Used only with Split Systems ▪ Field connection ▪ To connect the sensors in indoor
unit with PCB in outdoor unit. ▪ This cable 30 meters long.
For Sizes 55K – 90K 3
For Sizes 110K – 145K –
190K – 250K – 300K 4
USB used with BMS connections
1
▪ Can be connected to BMS for complete control solutions.
▪ Field connection.
Instructions of Sensors Connection Cables :
Main PCB PCB Cable 1 Meter
Connection Cable 30 Meter
Sensor head in indoor unit
1 Meter
Group of sensor cable
The group of sensor cable : Sensor consist of 3 parts
- PCB cable : from the main PCB outdoor unit to the connection cable.
- Connection cable : This cable 30 meters, from the PCB cable to the sensor head.
- Sensor head
Note :
- The connection cables are field connections.
Page 5 of 23
5. Control Functions of Smart Link LCD Wired Controller
1. On/Off
Press button to On/Off the unit
2. Mode of operation
Press button to select mode of operation: Heating, Cooling, Fan only, Dehumidify
3. Indoor blower speed
Single speed for products mentioned in this manual.
Note : button
For other products ( not included in this manual, the button is used to change fan speed).
4. Key lock
4.1. Press and hold and buttons for 1 second to activate keylock
( Only button is effective during keylock )
4.2. To deactivate key lock, repeat step 4.1
5. Temperature setting
5.1. Press or button to select desired temperature
5.2. Ambient temperature will be shown when there is no input for 6s
5.3. Not applicable in fan only mode
6. Clock setting
6.1. To set day
6.1.1. Press button to select day (Day symbol blinks) SUN–MON–TUE–WED–THU–FRI–SAT
6.1.2. Press button to save (Auto save when there is no input for 6s)
6.2. To set time
6.2.1. Press button and then or button to select time
00:00 — 00:01……— 11:58 -- 11:59--AM — PM
6.2.2. Press button to exit without save
6.2.3. Press button to save and exit
Page 6 of 23
Control Functions of Smart Link LCD Wired Controller
7. Timer On/Off setting
7.1. Timer default OFF
7.2. Timer symbol light up when timer set to ON
7.3. To set timer, press button once, temperature display area shows ‘—1’ and timer symbol
blinks.
7.3.1. Within 3s, press button to enter timer setting interface
7.3.2. Timer symbol ON blinks, temperature display area shows
Px(x = 1 ~ 4 which represent timer set number, maximum 4 set in a day )
7.3.3. Press button to select timer set number (maximum 4 set in a day),
temperature display area shows P1 ~ P4
7.3.4. Interface automatically return to default page if there is no input within 3s
7.3.5. Press button to select timer day
SUN – MON – TUE – WED – THU – FRI – SAT
7.3.6. Press or button to select timer time
00:00—00:01……—11:58-- 11:59-- AM—PM
7.3.7. Press button to select timer On/Off status
7.3.8. Press button to exit without save
7.3.9. Press button to save and exist
7.3.10. Press and hold button for 1s to cancel current timer setting, clock area displays ‘-:--‘
7.3.11. Press and hold button for 3s to cancel all timer setting, day display area all lights up,
clock display area displays ’-:--‘
7.3.12. Timer setting will be saved and exit automatically if there is no input for 30s
Page 7 of 25
Control Functions of Smart Link LCD Wired Controller
8. Check various temperature readings
8.1. Press and hold and button for 3 seconds to enter various temperature
readings page
8.2. Error code display area shows unit number; Temperature display area shows category; Clock
display area shows readings; No displays on all other area
8.3. Press or button to select unit
8.4. Press or button to select category
8.5. Press button to exit ( Auto exit when there is no input for 60 seconds )
8.6. Temperature display category
8.6.1 For Single Stage Cool / Two Stage Heat Split System or Vertical Packaged System
Sizes 55K – 90K
Category Temperature display
AI 1 Return air temperature
AI 2 Outdoor air temperature
AI 3 Supply air temperature
AI 4 #1 indoor coil temperature
8.6.2 For Two Stage Cool / Two Stage Heat Split System or Vertical Packaged System
Sizes 110K – 145K – 190K – 250K – 300K
Category Temperature display
AI 1 Return air temperature
AI 2 Outdoor air temperature
AI 3 Supply air temperature
AI 4 #1 indoor coil temperature
AI 5 #2 indoor coil temperature
Page 8 of 25
Control Functions of Smart Link LCD Wired Controller
1. Limited operation time setting
9.1 Press button twice (Temperature display area shows ‘—2’, key lock symbol blinks),
and press button within 3 seconds to enter limited operation time setting
9.2 Clock display area shows ‘---‘ pending password entry
9.3 Interface automatically exit if no input within 3 seconds
9.4 Press or button to select password for first digit and press
button to confirm and proceed to second digit password entry
9.5 Password entry “ 2828 ” to enter limited operation time setting
9.6 Temperature display area shows parameter category and correspondence category value will be
shown at clock display area
9.7 H – High limited run time ; L – Low limited run time
9.8 Set range 0 – 99 hours
9.9 Press or button to select different parameter category
9.10 Press button or button to change and select parameter value
9.11 Press and hold button for 1 second to save and exit
9.12 Press and hold button for 1 second to exit without save
2. Error reset
Press and hold button for 3 seconds
3. Functional test
11.1 Press and hold button and button for 3 seconds within 1 minute upon
power on to test function on mainboard
11.2 Use for PCB testing only
Page 9 of 25
12 Error Code Display For 1 Stage Cool / 2 Stages Heat
• Error code display area symbol lights up and error code shows during system error
• All error codes ( if more than 1 ) will be showed one after another
• Press button to clear error ( for those with error rectified only )
• Error codes table reference
Error Description
Indication Reason
01 Phase Reversal / Loss Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair
02 Indoor Blower Motor Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair
03
04 Outdoor Blower Motor Error
Contact open : Corresponding system stops Contact closed : System resumes after error repair
07 Compressor High Pressure Protection / Compressor Overload Protection
High pressure protection ( Cool mode - Dehumidify mode “Dry” )
• Contact open for 1 second or more: Correspondence compressor stops, indoor blower continues to operate
• System resume after error cleared (Manual reset)
08 Compressor Low Pressure Protection
Low pressure protection ( Cool mode - Dehumidify mode “Dry” )
• Checking by-passed for the first 30 seconds after compressor started
• Contact open for 30 seconds or more : Correspondence compressor stops, indoor blower continues to operate.
• System resume after error cleared.
• For auto reset low pressure type, system resume after error clear ( automatic reset ) if 3 ( three ) low pressure errors occur in 2 hours, you have to reset manually from wired control.
• For manual reset low pressure type, you have to reset from the low pressure switch itself every error occurrence. For 3 ( three ) sequential occurrences in 2 hours wired controller need to be reset manually.
15 Electrical Heater Error
Electric heater failure ( Heat mode only )
• During error : All electric heaters stop
• System resume after error cleared ( Manual reset only )
• Indoor blower stops after 60 seconds
16 Return Air Temperature Sensor Error ( Open sensor or shorted sensor )
1. During cool and heat mode:
• Indoor blower continue to operate while compressor, electric heaters, and outdoor fan stop
• System resumes after error cleared 2. During fan only mode:
• Indoor blower continue to operate as normal
17 Outdoor Air Temperature Sensor Error ( Open sensor or shorted sensor )
During cool mode and dry mode
• No control over outdoor fan
18 Supply Air Temperature Sensor Error ( Open sensor or shorted sensor )
During cool mode and dry mode
• No control over indoor coil anti-freeze using supply air temperature sensor ( Anti freeze in this circumstances will be controlled by indoor coil temperature sensor only)
19 Indoor Coil Temperature Sensor ( Open sensor or shorted sensor )
During cool mode and dry mode (3 minutes by-passed after compressor cut in):
• Correspondence compressor stops Not applicable during heat and fan only mode
25
Indoor Coil Anti Freeze Protection 1. Excessive dirt on the indoor coil 2. Clogged air filters 3. Low ambient temperature operation
of cool mode.
Indoor coil anti freeze protection (Applicable only in cool mode)
• When Indoor coil temperature ≤ 0°C for 1 min and compressor started for at least 10 min
• Compressor stops and system report error
• Error automatically reset when indoor coil temperature ≥ 12°C for 1 min Anti-freeze (Control using supply air)
• When supply air temperature ≤ Tcpoff (Default 5°C) – compressor stop
• When supply air temperature ≥ (Tcpoff + Tdif) (Tdif default 5°C) for 1 min System resumes
29 Circuit Refrigerant Leak
Refrigerant leak protection
• Applicable only after compressor operated for 30 minutes
• System will enter refrigerant leak protection when : - During cool mode, indoor coil temperature > 24°C - During protection, indoor blower continue to operates, compressor and outdoor fan stop
• Error can only be reset manually
OFF DI1 Is Disconnected From COM 2
Notes :
• Outdoor air temperature sensor error, Supply air temperature sensor error & Coil temperature sensor errors appear during Cool & Dry modes only.
• When return air temperature sensor is dislocated, the reading is taken from the sensor of wired controller.
Page 10 of 25
13 Error Code Display For 2 Stages Cool / 2 Stages Heat
• Error code display area symbol lights up and error code shows during system error
• All error codes ( if more than 1 ) will be showed one after another
• Press button to clear error ( for those with error rectified only )
• Error codes table reference
Error Description
Indication Reason
01 Phase Reversal / Loss Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair
02 Indoor Blower Motor Error Contact open : Compressor, electric heaters, indoor blower, outdoor blower stop Contact closed : System resumes after error repair
03
04 Outdoor Blower Motor Error
Contact open : Corresponding system stops Contact closed : System resumes after error repair
07 1st Compressor High Pressure Protection / Compressor Overload Protection
High pressure protection ( Cool mode - Dehumidify mode “Dry” )
• Contact open for 1 second or more: Correspondence compressor stops, indoor blower continues to operate
• System resume after error cleared (Manual reset) 09 2nd Compressor High Pressure Protection / Compressor Overload Protection
08 1st Compressor Low Pressure Protection
Low pressure protection ( Cool mode - Dehumidify mode “Dry” )
• Checking by-passed for the first 30 seconds after compressor started
• Contact open for 30 seconds or more : Correspondence compressor stops, indoor blower continues to operate.
• System resume after error cleared.
• For auto reset low pressure type, system resume after error clear ( automatic reset ) if 3 ( three ) low pressure errors occur in 2 hours, you have to reset manually from wired control.
• For manual reset low pressure type, you have to reset from the low pressure switch itself every error occurrence. For 3 ( three ) sequential occurrences in 2 hours wired controller need to be reset manually.
10 2nd Compressor Low Pressure Protection
15 Electrical Heater Error
Electric heater failure ( Heat mode only )
• During error : All electric heaters stop
• System resume after error cleared (Manual reset only)
• Indoor blower stops after 60 seconds
16 Return Air Temperature Sensor Error ( Open sensor or shorted sensor )
1. During cool and heat mode:
• Indoor blower continue to operate while compressor, electric heaters, and outdoor fan stop
• System resumes after error cleared 2. During fan only mode:
• Indoor blower continue to operate as normal
17 Outdoor Air Temperature Sensor Error ( Open sensor or shorted sensor )
During cool mode and dry mode
• No control over outdoor fan
18 Supply Air Temperature Sensor Error ( Open sensor or shorted sensor )
During cool mode and dry mode
• No control over indoor coil anti-freeze using supply air temperature sensor ( Anti freeze in this circumstances will be controlled by indoor coil temperature sensor only)
19 1st Indoor Coil Temperature Sensor ( Open sensor or shorted sensor )
During cool mode and dry mode (3 minutes by-passed after compressor cut in):
• Correspondence compressor stops Not applicable during heat and fan only mode 20
2nd Indoor Coil Temperature Sensor ( Open sensor or shorted sensor )
25
1st Indoor Coil Anti Freeze Protection 1. Excessive dirt on the indoor coil 2. Clogged air filters 3. Low ambient temperature operation of
cool mode.
Indoor coil anti freeze protection ( Applicable only in cool mode )
• When Indoor coil temperature ≤ 0°C for 1 min and compressor started for at least 10 min
• Compressor stops and system report error
• Error automatically reset when indoor coil temperature ≥ 12°C for 1 min Anti-freeze (Control using supply air)
• When supply air temperature ≤ Tcpoff (Default 5°C) - All compressors stop
• When supply air temperature ≥ (Tcpoff + Tdif) (Tdif default 5°C) for 1 min System resumes
26
2nd Indoor Coil Anti Freeze Protection 1. Excessive dirt on the indoor coil 2. Clogged air filters 3. Low ambient temperature operation of
cool mode.
29 1st Circuit Refrigerant Leak
Refrigerant leak protection ( Individual circuit check )
• Applicable only after compressor operated for 30 minutes
• System will enter refrigerant leak protection when : - During cool mode, indoor coil temperature > 24°C - During protection, indoor blower continue to operates, compressor and outdoor fan stop
• Error can only be reset manually 30 2nd Circuit Refrigerant Leak
OFF DI1 Is Disconnected From COM 2
Notes : • Outdoor air temperature sensor error, Supply air temperature sensor error & Coil temperature sensor errors appear during Cool & Dry modes only.
• When return air temperature sensor is dislocated, the reading is taken from the sensor of wired controller.
Page 11 of 25
14 Control Algorithms
IO Definitions :-
Input Function Type Remarks
DI1 Remote On/Off (External interlock) Open/Close
Close: Unit on
Open: Unit off
DI2 Phase protection Normally closed 1s verification
DI3 Indoor blower protection Normally closed 1s verification
DI4 Outdoor blower protection Normally closed 3s verification
DI8 #1 compressor high pressure protection Normally closed 1s verification
DI9 #1 compressor low pressure protection Normally closed 30s verification
DI10 #2 compressor high pressure protection Normally closed 1s verification
DI11 #2 compressor low pressure protection Normally closed 30s verification
DI16 Heater protection Normally closed 1s verification
Input Function Type Remarks
AI1 Return air temperature sensor Analogue NTC -
AI2 Outdoor ambient air temperature sensor Analogue NTC -
AI3 Supply air temperature sensor Analogue NTC -
AI4 #1 indoor coil temperature sensor Analogue NTC Functionality
interlock with
correspondence
compressor AI5 #2 indoor coil temperature sensor Analogue NTC
Output Function Type Remarks
DO1 #1 Compressor Normally open AC220V
DO2 #2 Compressor Normally open AC220V
DO5 Outdoor blower motor Normally open AC220V
DO9 #1 Electric heater Normally open AC220V
DO10A #2 Electric heater Normally open AC220V
DO11A Single speed blower motor Normally open AC220V
DO12A—DO12B General alarm - Dry contact
Page 12 of 25
Control Algorithms
Algorithms:-
1. Control target: Return air temperature
a. To control compressor and electric heater loading/unloading
b. Default set temperature: 24C
c. Temperature set range: 16 ~ 30C
Compressor sequence Cool mode Heat mode
Cut in zone T > Ts+1.5C T < Ts-1.5C
Loading zone T > Ts+1C T < Ts-1C
Status quo Ts+1C ≥ T ≥ Ts-1C Ts-1C ≤ T ≤ Ts+1C
Unloading zone T < Ts-1C T > Ts+1C
Cut out zone T < Ts-1.5C T > Ts+1.5C
Emergency stop zone T < Ts-2C T > Ts+2C
Remarks: T - Return air temperature
Ts - Set temperature
2. Compressor
a. Compressor operates in cool mode, dry mode only
b.Compressor stops during error:
i. High pressure protection
ii. Low pressure protection,
iii. Phase protection
iv. Indoor blower error
v. Correspondence return air temperature sensor error
c. Compressor starts according to loading cycle
d.Compressor stops according to unloading cycle
e. Compressor balance loading sequence apply
f. Dehumidify mode algorithm similar to cooling mode compressor loading/unloading algorithm
but with compressor operates for 10mins every 5mins interval
3. Compressor/Electric heater anti-short cycle duration
a. Compressor start to subsequent start minimum duration : Default 300 seconds
b.Compressor anti-short cycle duration : 180 seconds
c. Electric heater anti short-cycle duration : 60 seconds
Page 13 of 25
Control Algorithms
4. Indoor blower (Selectable single speed)
a. System On: Indoor blower starts
b. Compressor/Electric heater only allow to start after 15 seconds
c. Cool mode: Indoor blower continues to operate
d. Heat mode ( For Cool / Electrical Heat models ) :
Indoor blower stops (selectable through wired controller ) 60 seconds after all electric
heaters stopped
5. Electric heater ( For Cool / Electrical Heat models ) :
e. Electric heater operates only in heat mode
f. Electric heater stops during error:
i. Correspondence electric heater error
ii. Phase failure
iii. Indoor blower error
g. Electric heater starts according to loading cycle
h. Electric heater stops according to unloading cycle
i. Electric heater balance loading sequence apply
6. Outdoor Blower
a. Outdoor blower starts 2 seconds before compressor cut in
b. Outdoor blower stops simultaneously with compressor
Page 14 of 25
Control Algorithms
7. General alarm relay output
Relay closes during error
8. Cool mode On/Off sequence
No Cool mode ON cycle Remarks
1 System On
2 Remote On/Off (External interlock) contact
closed Phase protection contact closed Contact open: System standby
3 Indoor blower starts
15s delay
Indoor blower error: Indoor blower
stops, system standby
4 Check return air temperature
5 Compressor cut in Compressor balance loading criteria apply
6 Check loading cycle
7 On cycle ends
No Cool mode OFF cycle Remarks
1 System Off
2 Remote On/Off (External interlock) contact open
3 Stop compressor #1
4 3 seconds delay
5 Stop compressor #2
6 Outdoor blower stops
7 15 seconds delay
8 Indoor blower stops
9 Off cycle ends
Page 15 of 25
Control Algorithms
Dry mode On/Off sequence
No Dry mode ON cycle Remarks
1 System On
2 Remote On/Off (External interlock) contact closed Phase protection contact closed
Contact open: System standby
3 Indoor blower starts 15s delay Indoor blower error: Indoor blower stops, system standby
4 Check return air temperature
5 Run compressor #2
6 30 sec delay
7 Run compressor #1
8 System Run for 9.5 min
9 Stop compressor #1
10 30 sec delay
11 Stop compressor #2
12 System Stop for 4.5 min
13 Repeat Run and Stop Interval, from step 5 to 12
No Dry mode OFF cycle Remarks
1 System Off
2 Remote On/Off (External interlock) contact open
3 Stop compressor #1
4 3 seconds delay
5 Stop compressor #2
6 Outdoor blower stops
7 15 seconds delay
8 Indoor blower stops
9 Off cycle ends
Page 16 of 25
Control Algorithms
1. Heat mode On/Off sequence
Applicable to cooling only model
No Heat mode (Cool / Electrical Heat) ON cycle Remarks
1 System On
2 Remote On/Off (External interlock) contact
closed Phase protection contact closed Contact open: System standby
3 Indoor blower starts 15 seconds delay Indoor blower error: Indoor blower stops,
system standby
4 Check return air temperature
5 Electric heater cut in Electric heater balance loading criteria apply
6 Check loading cycle
7 On cycle ends
No Heat mode (Cool / Electrical Heat) OFF cycle Remarks
1 System Off
2 Remote On/Off (External interlock) contact open
3 Stop electric heater #1
4 3 seconds delay
5 Stop electric heater #2
6 60 seconds delay
7 Indoor blower stops
8 Off cycle ends
2. Fan mode On/Off sequence
No Fan mode ON cycle Remarks
1 System On
2
Remote On/Off (External interlock) contact
closed Phase protection contact closed Contact open: System standby
3 Indoor blower starts Indoor blower error: Indoor blower
stops, system standby
4 On cycle ends
No Fan mode OFF cycle Remark
s 1 System Off
2 Remote On/Off (External interlock) contact open
3 Indoor blower stops
4 Off cycle ends
Page 17 of 25
15 SENSOR SPECIFICATIONS
R-T CONVERTION TABLE
R25 = 10kΩ ± 1% B25/50 = 3450 ±1% Connector type: XH-2Y
T Rmin Rnom Rmax T Rmin Rnom Rmax
(℃) (kΩ) (kΩ) (kΩ) (℃) (kΩ) (kΩ) (kΩ)
-40 220.8 230.4 240.3 -10 44.2 45.32 46.47
-39 208 216.9 226.1 -9 42.13 43.19 44.26
-38 196 204.2 212.8 -8 40.18 41.16 42.17
-37 184.8 192.5 200.4 -7 38.33 39.25 40.19
-36 174.3 181.4 188.7 -6 36.58 37.44 38.31
-35 164.5 171.1 177.9 -5 34.92 35.72 36.54
-34 155.3 161.4 167.8 -4 33.34 34.09 34.86
-33 146.7 152.4 158.3 -3 31.85 32.55 33.26
-32 138.6 143.9 149.4 -2 30.43 31.09 31.75
-31 131.1 136 141.1 -1 29.08 29.7 30.32
-30 124 128.6 133.2 0 27.8 28.38 28.96
-29 117.3 121.6 125.9 1 26.59 27.13 27.68
-28 111.1 115 119.1 2 25.44 25.94 26.45
-27 105.2 108.9 112.6 3 24.34 24.81 25.29
-26 99.62 103.1 106.6 4 23.3 23.74 24.19
-25 94.41 97.62 100.9 5 22.31 22.72 23.14
-24 89.52 92.52 95.58 6 21.37 21.75 22.14
-23 84.91 87.7 90.56 7 20.47 20.83 21.19
-22 80.57 83.17 85.84 8 19.62 19.95 20.29
-21 76.48 78.91 81.39 9 18.81 19.12 19.44
-20 72.63 74.89 77.21 10 18.03 18.32 18.62
-19 68.99 71.11 73.24 11 17.29 17.57 17.84
-18 65.56 67.54 69.53 12 16.59 16.85 17.1
-17 62.32 64.17 66.03 13 15.92 16.16 16.4
-16 59.27 61 62.73 14 15.28 15.5 15.73
-15 56.38 58 59.62 15 14.67 14.88 15.09
-14 53.69 55.17 56.68 16 14.09 14.28 14.48
-13 51.12 52.5 53.91 17 13.53 13.71 13.9
-12 48.68 49.97 51.29 18 13 13.17 13.34
-11 46.38 47.58 48.81 19 12.5 12.65 12.81
Page 18 of 25
SENSOR SPECIFICATIONS
R-T CONVERTION TABLE
R25 = 10kΩ ± 1% B25/50 = 3450 ±1% Connector type: XH-2Y
T Rmin Rnom Rmax T Rmin Rnom Rmax
(℃) (kΩ) (kΩ) (kΩ) (℃) (kΩ) (kΩ) (kΩ)
20 12.01 12.16 12.31 50 4.008 4.085 4.163
21 11.55 11.69 11.82 51 3.876 3.952 4.028
22 11.11 11.24 11.36 52 3.749 3.823 3.899
23 10.69 10.81 10.92 53 3.627 3.7 3.774
24 10.29 10.39 10.5 54 3.509 3.581 3.654
25 9.9 10 10.1 55 3.396 3.467 3.539
26 9.523 9.623 9.723 56 3.287 3.356 3.427
27 9.163 9.263 9.363 57 3.182 3.25 3.32
28 8.819 8.918 9.018 58 3.081 3.148 3.216
29 8.489 8.588 8.687 59 2.983 3.05 3.117
30 8.174 8.272 8.371 60 2.89 2.955 3.021
31 7.872 7.97 8.068 61 2.799 2.863 2.928
32 7.583 7.68 7.777 62 2.712 2.775 2.839
33 7.306 7.402 7.499 63 2.628 2.69 2.753
34 7.041 7.136 7.232 64 2.547 2.608 2.67
35 6.787 6.881 6.976 65 2.469 2.529 2.589
36 6.543 6.637 6.731 66 2.394 2.452 2.512
37 6.31 6.402 6.495 67 2.321 2.379 2.437
38 6.086 6.177 6.269 68 2.251 2.308 2.365
39 5.871 5.961 6.052 69 2.184 2.239 2.296
40 5.665 5.754 5.844 70 2.119 2.173 2.228
41 5.468 5.556 5.644 71 2.056 2.109 2.163
42 5.278 5.365 5.452 72 1.995 2.047 2.101
43 5.096 5.182 5.268 73 1.936 1.988 2.04
44 4.921 5.006 5.091 74 1.879 1.93 1.982
45 4.754 4.837 4.921 75 1.825 1.874 1.925
46 4.592 4.674 4.757 76 1.772 1.821 1.87
47 4.437 4.518 4.6 77 1.721 1.769 1.817
48 4.289 4.368 4.448 78 1.671 1.718 1.766
49 4.146 4.224 4.303 79 1.624 1.67 1.717
Page 19 of 25
16 BMS Connection
Schematic diagram
Example for BMS connection
• If you have 3 units, and you want to connect them together with a BMS system.
• First you must set a number for every unit as shown in previous diagram by following
below steps:
1. Press twice (Temperature display area shows ‘—2’, key lock symbol blinks),
press within 3s to enter parameters setting interface.
2. Clock display area shows ‘---‘ pending password entry Press or to select password for
first digit and press to confirm and proceed to second digit.
3. Pass 8699.
4. Temperature display area shows parameter category and correspondence category value will
be shown at clock display area.
5. Press or to select different parameter category.
6. Go to parameter 17.
7. Press or to change and select parameter value.
8. you can set unit number from 0 to 199, default 0.
9. Press and hold for 1s to save and exit.
A1,B1 A1,B1 A1,B1
Unit No.1 Unit No.2 Unit No.3
Data logger RS232-RS485
Page 20 of 25
17 NETWORKING (BUILDING AUTOMATION SYSTEM)
Topology
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
Data Logger No:01
No:01 No:02 No:03 No:32
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
Data Logger No:02
No:01 No:02 No:03 No:32
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
Data Logger No:03
No:01 No:02 No:03 No:32
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
LCD Wallpad
PCB
RS232-RS485 Converter
No:32
No:01 No:02 No:03 No:32
Computer
Data Logger
Page 21 of 25
NETWORKING (BUILDING AUTOMATION SYSTEM)
General Modbus protocol
System Setup
Connection port :RS-485
Communication way :Half duplex
Communication format :Asynchronous Serial Communication
:1 start bit, 8 data bits, 1 stop bit
Baud rate :9600bps
Communication method :Master-slave (PC or master controller as Master, others as Slave)
BUS standard :MODBUS protocol, RTU (Remote Terminal Unit) mode
Error checking :CRC-16
Function Code Description Definition
01 (0x01)
Read Coils This function code is used to read from 1 to 2000 contiguous
status of coils in a remote device.
02 (0x02) Read Discrete Inputs This function code is used to read from 1 to 2000 contiguous
status of discrete inputs in a remote device.
03 (0x03)
Read Holding Registers This function code is used to read the contents of a contiguous
block of holding registers in a remote device.
04 (0x04)
Read Input Registers This function code is used to read from 1 to approx. 125
contiguous input registers in a remote device.
05 (0x05) Write Single Coil This function code is used to write a single output to either ON or
OFF in a remote device.
06 (0x06)
Write Single Register This function code is used to write a single holding register in a
remote device
15 (0x0F)
Write Multiple Coils
This function code is used to force each coil in a sequence of
coils to either ON or OFF in a
remote device.
16 (0x10)
Write Multiple registers
This function code is used to write a block of contiguous registers
(1 to approx. 120 registers)
in a remote device.
Error Code Description Definition
02 (0x02) Illegal Data Address The data address (register number) received in the query is not an
allowed address
04(0x04) Illegal Write Data The data written in the query is not valid
Page 22 of 25
NETWORKING (BUILDING AUTOMATION SYSTEM)
Control point list
Address Description
1 On/Off unit
Apply air-cooled system
COIL(bit) 2 Reserved
3 Reserved Read 01 (0x01)
4 Reserved Write 05 (0x05)
5 Reserved Write 15 (0x0F) 6 Reserved
7 Reserved 8 Reserved
DISCRETE STATUS(bit)
Read 02 (0x02)
Address Air-cooled package Description
4000 #1 compressor
Read discrete inputs
0 – Not in operation
1 – In operation
4001 #2 compressor
4004 #1 electric heater
4005 #2 electric heater
4008 Reserved
4011 Reserved
4012 #1 outdoor blower
1 Power failure
2 Indoor blower error
3 #1 outdoor blower error
7 #1 High pressure error
8 #1 Low pressure error
9 #2 High pressure error
10 #2 Low pressure error
15 Electric heater error
16 Return air temp sensor error
17 Outdoor air temp sensor error
18 Supply air temp sensor error
19 #1 Indoor coil temp sensor error
20 #2 Indoor coil temp sensor error
23 Reserved
24 Reserved
25 #1 Indoor coil anti-freeze protection
26 #2 Indoor coil anti-freeze protection
29 #1 Refrigerant leak protection
30 #2 Refrigerant leak protection
Page 23 of 25
NETWORKING (BUILDING AUTOMATION SYSTEM)
INPUT REGISTER
Read 04 (0x04)
Address Descriptions
1 Software code: 0x0001
2
System model code 1:-
Water-cooled package:0x00a0
Air-cooled package :0x0080 (Cooling model)
:0x0081 (Heat pump model)
3
System model code 2:-
D00 : 1-With electric heater
D01 : 1-With fresh air
D02 : 1-With domestic hot water
D03 : 1-Heat only model
D04 to D15 : Reserved
Address Air-cooled package Descriptions
100 Return air temperature Read Input
Registers
(Show value =
Actual value*10)
101 Outdoor air temperature
102 Supply air temperature
103 #1 Indoor coil temperature
104 #2 Indoor coil temperature
Page 24 of 25
NETWORKING (BUILDING AUTOMATION SYSTEM)
Address Descriptions
1 Set temperature (Air conditioning)
2 Reserved
3
Mode of operation :
1 - Cooling
2 - Fan only
4 - Dehumidification
8 - Heating
16 - Auto
HOLDING
4
Indoor blower speed :
1 - Low speed
2 - Medium speed
4 - High speed
8 - Auto
5 Reserved REGISTER
6 Reserved Read 03 (0x03) Write 06 (0x06)
Write 16 (0x10) Address Air-cooled package Descriptions
2000 Return air temperature correction
Temperature
correction
range
(-5℃ to 5℃)
Lock features
is applicable
only when
use with
LCD Wired Controller
type-T1
2001 Outdoor air temperature correction
2002 Supply air temperature correction
2003 #1 Indoor coil temp correction
2004 #2 Indoor coil temp correction
2011 System On/Off lock
2012 Mode of operation lock
2013 Set temperature lock
2014 Indoor blower speed lock
Page 25 of 25
18 Important Warning
Warning ( 1 ) : Please don’t change the arrangement of the Dip Switch as it is a factory setting to avoid losing warranty of the commercial system.
( :1تحذير )الخاصة بالوحده من فضلك ال تقم بأى تغيير فى مفاتيح الضبط
جهاز التكييف المركزيحفاظا على استمرار ضمان االلكترونيه
Warning ( 2 ) : Please don’t connect power supply or any kind of voltage source between the 2 points (DO12B - DO12A) to avoid damaging of the PCB and losing warranty of the commercial system.
( :2تحذير ) النقطتين من فضلك ال تقم بتوصيل مصدر كهربى إلى
( DO12B - DO12A ) حفاظا لتجنب تلف الوحدة االلكترونية و جهاز التكييف المركزيعلى استمرار ضمان
Warning ( 3 ) : Please don’t remove the wax from the dip switch to avoid losing warranty of the commercial system.
( :3تحذير )الضبط الخاصه بالوحده زاله الشمع من على مفاتيحإمن فضلك ال تقم ب
جهاز التكييف المركزي حفاظا على استمرار ضمان االلكترونيه
Warning ( 4 ) : Please follow the numbering in the cables of sensors while connecting cables parts. Hint: ( in split package systems )
( :4تحذير )الترقيم الموجود على السينسورات إتبعمن فضلك عند توصيل أسالك األسالك للتوصيل بشكل صحيح
( فقط فى حالة جهاز التكييف المركزي المنفصل) : توضيح
Main PCB
Warning (4)
(4تحذير )
Warning (2)
(2تحذير )
Warning (3)
(3تحذير )
Warning (1)
(1تحذير )
To BMS USB
فى حالة جهاز التكيف
المركزي المنفصل
أرقامالتحذيرات اتبع
فقط ( 4( و ) 2)
For split system units please follow warnings No. ( 2 ) and ( 4 ) only
Page 26 of 25
January 2020 Carrier is committed for continuous improvement of Carrier products according to national and international standards to ensure the highest quality and reliability standards, and to meet market regulations and requirements.
All specifications subject to change without prior notice according to Carrier policy of continuous development.
www.miraco.com.eg