Haier HSU12 User manual

SERVICE MANUAL
Order No.$&69
DC Inverter E-Series
Model No. HSU12/18VHJ(DB)
© (Qingdao Haier Air Conditioner General corp.,Ltd)
All right reserved .Unauthorized copying and distribution is a violation of law
Haier Group
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
Wall mounted Type

19
19
46
46
46
30
25
54
54
55
68
72
72
82
91
9
HSU12/18VHJ(DB)
of indoor unit
Main functions and control specifications of outdoor unit
Function of main thermistor
31
Value of thermistor
4
Service Diagnosis
54
Caution for diagnosis
M
3Error codes and description indoor display
For 12K indoor unit
For 18K indoor unit
For 12/18K outdoor unit

12/ VHJ(DB)
101
101
102
106

Introduction
1
Domestic Air Conditioner
1. Introduction
1.1 Safety Cautions
Be sure to read the following safety cautions before conducting repair work.
The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important
since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead
to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety
caution items described below.
About the pictograms
This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
This symbol indicates an action that must be taken, or an instruction.
The instruction is shown inside or near the symbol.
After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates
normally, and explain the cautions for operating the product to the customer.
1.1.1 Caution in Repair
Warning
Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for
a repair.
Working on the equipment that is connected to a power supply can cause an electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not
touch any electrically charged sections of the equipment.
If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas.The
refrigerant gas can cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the welded section, release the
refrigerant gas completely at a well-ventilated place first.
If there is a gas remaining inside the compressor, the refrigerant gas or refrigerating machine oil
discharges when the pipe is disconnected, and it can cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas can generate
toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work.A charged capacitor can
cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug.
Plugging or unplugging the power cable plug to operate the equipment can cause an electrical shock or
fire.
+6812/VHJ(DB)

Introduction
2
Domestic Air Conditioner
Warning
Do not repair the electrical components with wet hands. Working on the equipment with wet hands can
cause an electrical shock.
Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical
shock.
Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical
shocks.
Be sure to turn off the power switch and unplug the power cable when cleaning the equipment. The
internal fan rotates at a high speed, and cause injury.
Do not tilt the unit when removing it. The water inside the unit can spill and wet the furniture and floor.
Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting repair
work. Working on the unit when the refrigerating cycle section is hot can cause burns.
Use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen
deficiency.
1.1.2 Cautions Regarding Products after Repair
Warning
Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to
conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can
cause an electrical shock, excessive heat generation or fire.
When relocating the equipment, make sure that the new installation site has sufficient strength to
withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation work is not conducted
securely, the equipment can fall and cause injury.
Be sure to install the product correctly by using the provided standard installation frame.
Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting
in injury.
For
integral
units only
Be sure to install the product securely in the installation frame mounted on a window frame.
If the unit is not securely mounted, it can fall and cause injury.
For
integral
units only
+6812/VHJ(DB)

Introduction
3
Domestic Air Conditioner
Warning
Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to
the electrical equipment, the internal wiring regulations and the instruction manual for installation when
conducting electrical work.
Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
Be sure to use the specified cable to connect between the indoor and outdoor units. Make the
connections securely and route the cable properly so that there is no force pulling the cable at the
connection terminals.
Improper connections can cause excessive heat generation or fire.
When connecting the cable between the indoor and outdoor units, make sure that the terminal cover does
not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section can cause an electrical shock,
excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable can cause an electrical shock or fire. Placing heavy items on the
power cable, and heating or pulling the power cable can damage the cable.
Do not mix air or gas other than the specified refrigerant (R-410A / R22) in the refrigerant system.
If air enters the refrigerating system, an excessively high pressure results, causing equipment damage
and injury.
If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the refrigerant. After
charging refrigerant, make sure that there is no refrigerant leak.
If the leak cannot be located and the repair work must be stopped, be sure to perform pump-down and
close the service valve, to prevent the refrigerant gas from leaking into the room. The refrigerant gas itself
is harmless, but it can generate toxic gases when it contacts flames, such as fan and other heaters,
stoves and ranges.
When replacing the coin battery in the remote controller, be sure to disposed of the old battery to prevent
children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
Caution
Installation of a leakage breaker is necessary in some cases depending on the conditions of the
installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of combustible gas leaks.
If a combustible gas leaks and remains around the unit, it can cause a fire.
Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not
installed properly, water can enter the room and wet the furniture and floor.
For
integral
units only
+6812/VHJ(DB)

Introduction
4
Domestic Air Conditioner
1.1.3 Inspection after Repair
Warning
Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet
all the way.
If the plug has dust or loose connection, it can cause an electrical shock or fire.
If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
Damaged cable and wires can cause an electrical shock, excessive heat generation or fire.
Warning
Do not use a joined power cable or extension cable, or share the same power outlet with other electrical
appliances, since it can cause an electrical shock, excessive heat generation or fire.
Caution
Check to see if the parts and wires are mounted and connected properly, and if the connections at the
soldered or crimped terminals are secure. Improper installation and connections can cause excessive
heat generation, fire or an electrical shock.
If the installation platform or frame has corroded, replace it. Corroded installation platform or frame can
cause the unit to fall, resulting in injury.
Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can
cause an electrical shock.
Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 M
ohm or higher.
Faulty insulation can cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage can cause the water to enter the room and wet the furniture and floor.
+6812/VHJ(DB)

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1090(250-1450) 1190(250-1450)
16
8.0
1640(270-1900)
7.8
1650(270-1950)
9
8
7. 2
6. 3
45/ 42/38
53 53
5.4 5.9
3.95(0.88-4.25)
41 1/6 x 9 2/5 x 11 3/4
45 x 14 4/9 x 12 21/23
24
27.8
32
36.4
HSU12VHJ(DB)
3.51(0.88-3.95)
3018.6(756.8-3397) 3397(756.8-3655)
7
3/8 1/2
5/8
0.018
1/4 1/4
SL 4.8 4.8
16
0.15 0.15
33 33
2.82 3.52
36 13/14 x 7 1/6 x 10 3/7
39 7/8 x 10 5/6 x13
8
7. 2
6. 3
53 53
9
8. 2
7. 3
5.8
33 33
0.150.15
16
44
HSU18VHJ(DB)
12000(3000-13500) 13500(3000-14500) 18000(4000-19000) 19000(4000-20500)
5.27(1.17-5.57) 5.57(1.17-6.00)
4532.2(1006.2-4790.2
) 4790.2(1006.2-5160)
SEER/HSPF 16
9.5
49 1/5
82 1/50
32 4/5 49 1/5
HSU12/18VHJ(DB)
9
8. 2
7. 3
5.8
45/42/40 45/42/40
45/ 42/38
inches
inches
inches
5/8
feet
feet
feet
32 4/5 32 4/5
lbs
lbs
inches
inches
0.018
pints/hr
OZ/Inches

0.88
R410a R410a
35.27 42.33
79.4
72.8
49
63 59
21 3/8 x 30 5/6 x 10 2/51
24 1/6 X 36 3/5 X 13 2/5
780 780
3.5 3.5
53
31.6
4.9 4.8
1090 1050
20 26
80 80
650
ESTER OIL VG74
900
FV50S
Rotary Compressor
SNB130FGYM2
49
63 59
25 1/3 x 30 5/6 x10 2/51
28 1/9 X 36 3/5 X 13 27/70
53
88.2
97
8
1115
31.6
1115
31.6
1115
31.6
1115
0.65
Rotary Compressor
DA89X1C-20FZ
HSU12/18VHJ(DB)
oz
80 F 67 F
95 F 75 F
70 F /60° FWB
47 F 47 F
lbs
lbs
inches
inches
pints
16 2/5 feet

Domestic Air Conditioner
3ULQWHG&LUFXLW%RDUG&RQQHFWRU:LULQJ'LDJUDP
4.1᧶Indoor unit Connectors
Connectors
PCB(1) (Control PCB)
1) CN26 Connector for fan motor
2) CN11 Connector for STEP motor
3) CN8 Connector for heat exchanger thermistor and Room temperature thermistor
4)CN27 Connector for fan feedback
5)CH1 Connector for power L wire
6)CON2 Connector for power N wire
7) CON7 Connector for communicate wire
8) CN30 Connector for transformer input
9) CN31 Connector for transformer output
10) CN32 Connector for display board
Note: Other designations
PCB(1) (INdoor Control PCB)
1) CN48 Connector for Forced operation ON / OFF switch
2) J1 Select 25 or 35
3) LED1 communicate display light
4)RV1 Varistor
5) FUSE1 Fuse 3.15A/250VAC


FOR 12K
9
HSU12/18VHJ(DB)

Domestic Air Conditioner
PCB(1)
CN31
CN11CN1CN32CN26 CN27
CON2
CN30
CON12
CON8
CH1
10
HSU12/18VHJ(DB)


Domestic Air Conditioner
Connectors
PCB(1) (Control PCB)
1) CN26 Connector for fan motor
2) CN1 Connector for heat exchanger thermistor and Room temperature thermistor
3) CN11 Connector for UP&DOWN STEP motor
4) CON2 Connector for power N wire
5) CON1 Connector for power L
6) CN32 Connector for display board
7) C0N6 C0N8 Connector for ions generator
8ĐC0N7 Connector for communicate between the indoor board and the outdoor
board
Note: Other designations
PCB(1) (INdoor Control PCB)
1) CN48 Connector for Forced operation ON / OFF switch
2) J1 Select 25 or 35
3) LED1 communicate display light
4) RV1 Varistor
5) FUSE1 Fuse 3.15A/250VAC


FOR 18K
11
HSU12/18VHJ(DB)


Domestic Air Conditioner
PCB(1)
CN26
CON1
CON2
CN11
CN32
CN1
CN48
CON8
CON6
CON7
12
HSU12/18VHJ(DB)

Domestic Air Conditioner
4.2᧶Outdoor unit
Connectors
PCB(1) (Control PCB)
1) CN1 CN2 Connector for power N and L
2) CN3 Connector for ground
3) CN22 Connector for DC POWER 15Vand 5V to the module board
4) CN16 Connector for electric expansion valves
5) CN21 Connector for DC fan motor
6) CN10 Connector for four way valve coil
7) CN17 CN18 CN19 CN20 Connector for thermistors
(CN20: outdoor air CN19: heat exchanger CN18 :SUCK thermistors CN17 :discharge pipe)
8) CN23 Connector for communicate between the control board and the module board
9) CN25 CN8 Connector for the L N to the module board
10) CN4 Connector for communicate between the indoor board and the outdoor board
11) CN26 Connector for capacitance anode
12) CN24 Connector for capacitance cathode
PCB(2) (module PCB)
CN10 Connector for the DC power 5V and 15V form the control PCB
CN11 Connector for communicate between the control board and the module board
P( CN1) N(CN5) Connector for capacitance board
LI (CN7) LO(CN6) Connector for reactor
CN2 CN3 CN4 Connector for the U V W wire of the
compressor
Note: Other Designations
PCB(1) (Control PCB)
1) FUSE 1 (25A,250VAC) FUSE 2(1A,250VAC)
2)LED 1 keep light representative normal ,if keep flash interval representative trouble Alarm
3)RV1 RV2 RV3 Varistor
FOR12K
13
HSU12/18VHJ(DB)

Domestic Air Conditioner
PCB(1)
CN2
CN1
CN4
CN8
CN25
CN26 CN24 CN23 CN22
CN17
CN18
CN19
CN20
CN16
CN21
CN10
CN3
14
HSU12/18VHJ(DB)

Domestic Air Conditioner
PCB(2)
CN1
CN2
CN3
CN4
CN5
CN6
CN7
CN11
CN10
15
HSU12/18VHJ(DB)


Domestic Air Conditioner
Connectors
PCB(1) (Control PCB)
1) CN1 CN2 Connector for power N and L
2) CN3 Connector for ground
3) CN22 Connector for DC POWER 15Vand 5V to the module board
4) CN16 Connector for electric expansion valves
5) CN21 Connector for DC fan motor
6) CN10 Connector for four way valve coil
7) CN17 CN18 CN19 CN20 Connector for thermistors
(CN20: outdoor air CN19: heat exchanger CN18 :SUCK thermistors CN17 :discharge pipe
8) CN23 Connector for communicate between the control board and the module board
9) CN25 CN8 Connector for the L N to the module board
10) CN4 Connector for communicate between the indoor board and the outdoor board
11) CN26 Connector for capacitance anode
12) CN24 Connector for capacitance cathode
PCB(2) (module PCB)
CN10 Connector for the DC power 5V and 15V form the control PCB
CN11 Connector for communicate between the control board and the module board
P( CN1) N(CN5) Connector for capacitance board
LI (CN7) LO(CN6) Connector for reactor
CN2CN3CN4 Connector for the U V W wire of the
compressor
Note: Other Designations
PCB(1) (Control PCB)
1) FUSE 1 (25A,250VAC) FUSE 2(1A,250VAC)
2)LED 1 keep light representative normal if keep flash interval representative trouble Alarm
3)RV1 RV2 RV3 Varistor
FOR 18K
16
HSU12/18VHJ(DB)


Domestic Air Conditioner
PCB(1)
CN2
CN1
CN4
CN8
CN25
CN26 CN24 CN23 CN22
CN17
CN18
CN19
CN20
CN16
CN21
CN10
CN3
17
HSU12/18VHJ(DB)