Haier 1U12DR4EAA User manual

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)

Haier Group

Version V1 Date 2016-11-07

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

275

660

540

275

720

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 .

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

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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Haier 1U12DR4EAA User manual

Haier 1U12DR4EAA User manual

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