Haier HSU18XH7-G - Ductless Split Indoor Wall Mount Unit Heat... User manual

SERVICE MANUAL
Order No. $&69
ON/OFF -Series
Model No. HSU-18HEK13/R2
EK
HSU-24HEK13/R2
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
©2011(Qingdao Haier Air Conditioner General corp.,Ltd)
All right reserved .Unauthorized copying and distribution is a violation of law

HSU-18/24HEK13/R2 Table of Contents
1.Features...................................................................................................... 1
2.Introduction ................................................................................................ 2
3.Specifications ............................................................................................. 7
4.Printed circuit board connector wiring diagram ..................................... 9
5.Functions and control .............................................................................. 10
5.1 Main functions and control specification .................................................. 10
5.2 Value of thermistor ................................................................................... 15
6. System configuration ............................................................................... 23
6.1 System configuration ................................................................................ 23
6.2 Instruction ................................................................................................. 24
7. Service diagnosis .................................................................................... 31
7.1 Caution for diagnosis ................................................................................ 31
7.2 Problem symptoms and measures ........................................................... 32
8. Capacity diagrams and curves diagrams ............................................... 33
9. Installations ............................................................................................... 43
10.Wiring Diagrams ....................................................................................... 47

Features
1. Features
DRY function: Make dehumidifying in the room when the unit is working in the "DRY" mode
24 Hour timer: Use the timer function to set on,or off,or from on to off,or from off to on
Auto restart: The function permits automatic return to previous peration conditions
Easy clean design: The panel is easy to wash and the airflow vents can be detached without
any special tools for quick cleaning of the inside of the air conditioner
Anti-mold filter: Catches most small particles and remove unpleasant odors effectively
Sleep mode: The setting temprature and the indoor noise can be adjusted to a more
comfortable level when you set the "sleep mode"during night sleep
ESF filter :
Trap harmful dust and remove unpleasant odors effectively
Auto mode: According to the fixed temperature "26 "
,the unit will adjust
the operation mode automatically.
Intelligent air With twin-blade technology ,the airflow can be adjusted not to blow directly to human
HSU-18 24 HEK13/R2

Introduction
2. Introduction
2.1 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.
2.1.1 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.
HSU-18 24HEK13/R2
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Introduction
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.
2.1.2 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
HSU-18 24HEK13/R2
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