Heiko AS68TDRHRA-C User manual

SERVICE MANUAL
This servic e informatio n is designed for experience d repai r technician s only and is not designe d for use by the genera l public.
It does not contain warning s or caution s to advise non-technic al individuals of potentia l dangers in attemptin g to servic e a product.
Product s powered by electricit y shoul d be service d or repaire d only by experience d professiona l technicia ns. Any attemp t to service or
Repai r the produc t or product s dealt with in this servic e infor mation by anyone else could result in seriou s injury or death
WARNING
Version V1 Date 2022-10-21
Model
AS68TDRHRA-C

Table of contents
Domestic air conditioner
Contents
1. Introduction ............................................................................................ 1
2. Features ................................................................................................ 7
3. Specifications ........................................................................................ 8
4. Sensors list............................................................................................ 9
5. Piping diagrams .....................................................................................10
6. Printed circuit board connector wiring diagram.....................................11
7. Functions and control ...........................................................................
8. Dimensional drawings ...........................................................................
9. Center of gravity..................................................................................
10. Service Diagnosis ................................................................................
11. Circuit diagrams ..................................................................................
14
.50
27
26
26
12.
Removal Procedure ............................................................................
.51

Introduction
Domestic air conditioner
1. Introduction
1.1 Model name explanation
A S 6 8 T D RH R A
Nominal cooling capacity (24000BTU/h)
Type of indoor unit: S (wall-mounted)
Indoor unit
Platform of indoor units: T (T platform)
50T Platform
Version number
Indoor units
DC inverter
Self-clean
Apply toT1; 220~240V50HZ/1ph
C

Intuoduction
2 Domestic air conditioner
1.2 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.
1.2.1 Embedded wire checking before installation
Check the embedded wire diameter suitable to request:
(Power supply from indoor: 2.5kw ≥1.0mm2 3.5kw,5kw ≥1.5mm2 7kw ≥1.0mm2 ; Power supply from outdoor
≥1.0mm2 )
Check the embedded wire are four roots, L/N/COM/GND; GND is needed, if
●not, thunder or high voltage wave
from power grid will impact to the performance
●
Using a multi-meter to test short circuit of the four roots wires, make sure no short circuit happen.
●
1.2.2 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.

Intuoduction
3 Domestic air conditioner
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.
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
shock.
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.
1.2.3 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