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Haier 1U12DR4EAA User manual

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SERVICE MANUAL
Wall Mounted Type
ON/OFF
1U12DR4EAAModel No.
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
Repair the product or products dealt with in this service information by anyone else could result in serious injury or death
WARNING
2016 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version V1 Date 2016-11-07
Contents
Contents
1. Introduction ............................................................................................1
2. Specifications.........................................................................................7
3. Piping diagrams ................................................................................... 9
4. Operation range...................................................................................10
5. Printed Circuit Board Connector Wiring Diagram .................................11
6. Dimensional drawings..........................................................................12
7. Center of gravity ..................................................................................12
8.
Service diagnosis
..................................................................................13
9
Performance
Curves Diagram.. . . . .............................................................................18
.
Introduction
1
Domestic air conditioner
1 Introduction
1.1 Model name explanation
1 U 1 2 D R 4 E AA
The maximum combination number
Type of outdoor unit: U (normal type)
Nominal cooling capacity (12000BTU/h)
Platform of outdoor units: D (D platform)
Version number
Heat pump & R410A refrigerant
AC
Apply toT1; 220~240V50HZ/1ph
District
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Specifications
7
Domestic air conditioner
2 Specifications
NOMINAL DISTRIBUTION SYSTEM VOLTAGE
1/esahP
05zHycneuqerF
032VegatloV
NOMINAL CAPACITY and NOMINAL INPUT
cooling heating
Capacity rated
KW 3.31
Power Consumption(Rated) KW 1.03
16.312.3W/WPOC/REE
h/³mlavomeRerutsioM
TECHNICAL SPECIFICATIONS-UNIT
Dimensions H*W*D mm 660×275×540
Packaged
Dimensions
H*W*D mm 802×373×595
82GK/thgieW
13GK/thgiewssorG
Sound level Sound pressure dB 53
ELECTRICAL SPECIFICATIONS
cooling heating
Nominal running current A 4.7 4.4
Maximum running current A 6.0 6.0
AtnerrucgnitratS
14.1
13.1
1.6*10 ³
-
3.57
Btu/h
11250 12150
0.99
Specifications
8
Domestic air conditioner
TECHNICAL SPECIFICATIONS-PARTS
cooling heating
Compressor
Type Rotary Compressor
Model 44A273BJ-FJKD
Motor output W 1120
Oil type
68EP or equivalent
Oil charge volume L 0.32
Fan
Type Axial fan
Motor output W 20
Air flow rate(high) m³/h 1500
Speed(high/low) rpm 920
Heat
exchanger
Type
ML fin-7HI-HX tube
Row*stage*pitch 1.5*24*1.40
TECHNICAL SPECIFICATIONS-OTHERS
Refrigerant
circuit
Refrigerant type R410a
Refrigerant charge KG 0.84
Maximum allowable distance
between indoor and outdoor
m 15
Maximum allowable level difference m 10
Refrigerant control Capillary
Piping connections
(external diameter)
liquid mm ĭ.35
gas mm ĭ9.52
drain mm ĭ
Heat insulation type Both liquid and Gas pipes
Max. piping Length m 15
Max. Level Difference m 10
Chargeless m 7
Amount of Additional Charge of Refrigerant g/m 20
Note: the data are based on the conditions shown in the table below
cooling heating Piping length
Indoor: 27 DB/19 WBćć
Outdoor: 35 DB/24 WBćć
Indoor:20 DBć
Outdoor: 7 DB/6 WBćć
5m
Conversation formulae
Kcal/h= KW×860
Btu/h= KW×3414
cfm=m³/min×35.3
NMOC Ze-Gles RB
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Wiring Diagram
11
Domestic air conditioner
5. Printed Circuit Board Connector Wiring Diagram
Wiring diagrams
l
2.There are no dotted lines on cool only type.(marked
with @),Wire is connected from 4 (marked with
@@)on terminal block to 1.
1.See above for wiring of heat pump type.
NOTE:
3.The parts
ķ
are optional.
Dimensional drawings
12
Domestic air conditioner
6. Dimensional drawings
7. Center of gravity
3
8
540
660
660
275
275
660
540
275
720
unit:mm
unit:mm
Service diagnosis
Domestic air conditioner
8 Service Diagnosis
8.1 Caution for Diagnosis
The operation lamp flashes when any of the following errors is detected.
1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions,
disabling equipment operation.
2. When a signal transmission error occurs between the indoor and outdoor units. In either case, conduct the
diagnostic procedure described in the following pages.
8.2 Parameter of primary electronic appliance
13
erutciPretemaraPemaNON
1 Compressor
Rated voltage:220-240V
Rated current:5.2A
Rated frequency:50 Hz
Resistance:3.0
2 Fan motor
Rated voltage:220-230V
Rated current:0.35A
Rated frequency:50 Hz
:3
3 4-way valve
Rated voltage:
Rated current:0. 1A
Rated frequency:
50
Hz
: K
220-240V
/60
2.085
0
Rated inducta nce
Resistance
Rated
Service diagnosis
Domestic air conditioner
8.3 Problem Symptoms and Measures
Symptom Check Item Details of Measure
None of the units
operates
Check the power supply. Check to make sure that the rated voltage is supplied.
Check the indoor PCB Check to make sure that the indoor PCB is broken
Operation
sometimes stops.
Check the power supply.
A power failure of 2 to 10 cycles can stop air conditioner
operation.
Equipment
operates but
does not cool, or
does not heat
(only for heat
pump)
Check for faulty operation
of the electronic
expansion valve.
Set the units to cooling operation, and compare the
temperatures of the liquid side connection pipes of the
connection section among rooms to check the opening and
closing operation of the electronic expansion valves of the
individual units.
Diagnosis by service port
pressure and operating
current.
Check for insufficient gas.
Large operating
noise and
vibrations
Check the installation
condition.
Check to make sure that the required spaces for
installation (specified in the Technical Guide, etc.) are
provided.
14
Domestic air conditioner
Code indication
Description
Reference
Page
indoor
Indoor Malfunction
51
eruliafrosneserutarepmetmooR
1E
51
eruliafrosnesegnahcxe-taeH2E
61
rorreMORPEEroodnI
4E
71
noitcnuflamrotomnafroodnI41E
The code indication that is listed above is the main fault
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or else parts damage
may be occurred.
8.4.2.1Thermistor or Related Abnormality
Indoor Display E1: Room temperature sensor failure
E2: Heat-exchange sensor failure
The temperatures detected by the thermistors are used to determine thermistor errors
when the thermistor input is more than 4.92V or less than 0.08V during compressor
.noitarepo
Note: The values vary slightly in some models
Faulty connector connection
Faulty thermistor
Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
8.4Codes and Description
8.4.1Problem Symptoms and Measures
Symptom Check Item Details of Measure
None of the units
operates
Check the power supply.
Check to make sure that the rated voltage is
supplied.
Check the indoor PCB Check to make sure that the indoor PCB is broken
Equipment
operates but does
not cool, or does
not heat (only for
heat pump)
Diagnosis by service
port pressure and
operating current.
Check for insufficient gas.
Large operating
noise and
vibrations
Check the installation
condition.
Check to make sure that the required spaces for
installation (specified in the Technical Guide, etc.) are
provided.
8.4.2 Error Codes and Description indoor display
15
Service diagnosis
Page .
Page .
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Method of
Malfunction
Detection
Malfunction
Detection
Conditions
Supposed
Causes
Yes
Troubleshooting
Domestic air conditioner
Thermistor resistance check method:
Remove the connector of the thermistor on the PCB, and measure the resistance of thermistor using tester. The
relationship between normal temperature and resistance is shown in the value of indoor thermistor.
8.4.2.2 EEPROM abnormal
Indoor Display E4: indoor EEPROM error
The Data detected by the EEPROM are used to determine MCU
When the data of EEPROM is error or the EEPROM is damaged
Faulty EEPROM data
Faulty EEPROM
Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector,
or parts
damage may be occurred.
Thermistor resistance check
Is it normal?
Yes
NO
Yes
Is it normal?
NO
Check the connector connection.
Replace the thermistor
Replace the indoor unit PCB
Correct the connection
Replace the indoor or outdoor mainboard
Service diagnosis
16
Method of
Malfunction
Detection
Malfunction
Detection
Conditions
Supposed
Causes
Yes
Troubleshooting
Domestic air conditioner
8.4.2.3 Indoor AC fan motor malfunction
Indoor Display
E14
The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation
when the detected rotation feedback signal don’t received in 2 minutes
Operation halt due to breaking of wire inside the fan motor.
Fan motor overheat protection
Operation halt due to breaking of the fan motor lead wires
Detection error due to faulty indoor unit PCB
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else parts
damage may be occurred.
Service diagnosis
17
Method of
Malfunction
Detection
Malfunction
Detection
Conditions
Supposed
Causes
Yes
Troubleshooting
Check whether terminals
on indoor
p
cb is well?
Electrify the machine again and turn it on in the cooling operation,
Measure voltage between the positions 1and 3 of Terminal CN5 on
the indoor PCB
the voltage is about 90-220vac
check whether motor can run
when turn on the unit
the indoor motor is damaged and need replace
Yes
NO
NO
Yes
Measure whether there is voltage pulse(0-5VDC)
between the positions middle wire and black wire
of Terminal CN2 on the indoor PCB
NO
the indoor pcb is damaged and need replace
Pull out the terminals on the indoor
mainboard and reinsert them.
No
Yes
Is it ok?
Yes
Performance Curves Diagram
Domestic air conditioner
9 Performance Curves Diagram
9.1 Cooling capacity-temperature curves
18
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