Heiko BRISA JS050-C2 Owner's Manual

SERVICE MANUAL
Model JS050-C2
WARNING
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 doe s not contai n warning s or caution s to advise non-technic al individu als 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 deal t with in this servic e infor mation by anyone else could result in seriou s injury or death
Version V1
Date 2020-11-14
Table of contents
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 ........................................................................... 14
8. Dimensional drawings ........................................................................... 26
9. Center of gravity .................................................................................. 26
10. Service Diagnosis ................................................................................ 27
11. Circuit diagrams .................................................................................. .44
Domestic air conditioner
Introduction
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.
Domestic air conditioner
Introduction
1.2.1 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.
2
Domestic air conditioner
Introduction
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.
1.2.2 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.
For
Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting
integral
in injury.
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.
3
For
integral
units only
Domestic air conditioner
Introduction
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.
4
Domestic air conditioner
Introduction
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.
1.2.3 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.
5
Domestic air conditioner
Introduction
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.
1.2.4 Using Icons
Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in
the table below:
1.2.5 Using Icons List
Icon
Type of Information
Note
Note
Description
A “note” provides information that is not indispensable, but may
nevertheless be valuable to the reader, such as tips and tricks.
A “caution” is used when there is danger that the reader, through
Caution
Caution
incorrect manipulation, may damage equipment, loose data, get
an
unexpected result or has to restart (part of) a procedure.
Warning
Warning
A “warning” is used when there is danger of personal injury.
A “reference” guides the reader to other places in this binder or in
Reference
this manual, where he/she will find additional information on a
specific topic.
6
Domestic air conditioner
Features
2.Features
Super quiet: Lower noise operation condition
A-PAM DC inverter:With adoption of S-TYPE,S-PAM and PHASE control technology to works more
stably at low-frequency,and is more energy-saving,mor powerful at high frequency.
Long distance air supplying:The indoor unit is improved by optimized motor,fan and air duct so as to
provide long distance airflow with 12m+ maximum.
-15
10
Heating: When -15
can still heating natural
heating maintenance:Heating Holding 10
temperature
Confortable sleep The setting temperature and the indoor noise can be adjusted to a more comfortable
level when you set the “sleep mode” during night sleep.
Super match:One outdoor unit can match two or more indoor unit.
DIY auto mode: Adjust the last fixed operation mode automatically.
Turbo mode: Quick cooling or heating
Auto restart: Automatic return to previous operation conditions after sudden power blackout
24 hours timer: Use the timer function to set on,or off,or from on to off,or from off to on.
Intergrative valve cover:The valve cover is Intergrative.
2-way piping design: The pipe can shoot out both from left or right side.
Easy clean design: The panel is easy to wash and the airflow vents can be detached easily
Double 8 display:The display is Double 8 mode.
7
Domestic air conditioner
Specifications
3.Specifications
NOMINAL DISTRIBUTION SYSTEM VOLTAGE
Phase
/
1
Frequency
Hz
50
Voltage
V
230
NOMINAL CAPACITY and NOMINAL INPUT
cooling
KW
Capacity rated
Btu/h
heating
5.0（1.3-5.8）
5.2（1.4-6.0)
（4770-20470）
17060
（4430-19790）17740
Power Consumption(Rated)
KW
1.46
1.40
SEER/SCOP
W/W
6.1
3.41
Annual energy consumption
KWh
287
1610
Moisture Removal
m³/h
2.0*10 ³
TECHNICAL SPECIFICATIONS
Dimensions
H*W*D
mm
1008*225*318
Packaged Dimensions
H*W*D
mm
1085*329*403
Weight
/
KG
11.6
Gross weight
/
KG
14.4
Color
/
/
White
Sound
Sound level
peessure(Hi/Mid/Lo)
Sound power(high)
dB(A)
44/40/35
44/40/35
dB(A)
57
57
Domestic air conditioner
Specifications
TECHNICAL SPECIFICATIONS-PARTS
cooling
Type
Fan
Cross flow fan
Motor
W
40
Air flow rate(high)
m³/h
Speed(Hi/Mid/Lo)
rpm
40
1000
950/825/700
1050/900/750
Type
Heat exchanger
heating
ML fin-
Segment *stage*fitch
7HI-HX tube
3*16*1.4
Air direction control
Right,Left,Horizontal,Downward
Removable/Washable/Mildew Proof
Air filter
Microcomputer Control
Temperature control
Remote controller model
0010401715Y
Note: the data are based on the conditions shown in the table below
cooling
heating
Indoor: 27 DB/19 WB
Indoor:20 DB
Outdoor: 35 DB/24 WB
Outdoor: 7 DB/6 WB
4
type
Piping length
5m
Conversation formulae
Kcal/h= KW×860
Btu/h= KW×3414
cfm=m³/min×35.3
Sensors list
Description
Room and pipe sensor Its used for detecting room and evaporator temperature
Qty
1
Domestic air conditioner
Piping diagrams
5
Piping diagrams
EEV
EEV
10
Domestic air conditioner
Printed circuit board connector wiring diagram
6. Printed circuit board connector wiring diagram
Connectors
PCB(1) (Control PCB) For 18k / 24K
1) CN9
Connector for fan motor
2) CN6
Connector for heat exchanger thermistor and Room temperature thermistor
3) CN5’ Connector for UP&DOWN STEP motor
4) CN11 CN11’ Connector for RIGHT&LEFT STEP motor
5) CN21 white line
CN17(black line) Connector for indoor terminal N and L
6) CN7 Connector for display board
7) CON2 CON3 Connector for ion generator
8) CN23 (red line) Connector for communicate between the indoor board and the outdoor board
9) CN36
Connector for long-range control
10) CN34
Connector for wifi Module
11) CON1
Connector for fresh air
12) CN2
Connector for wired controller
13) CN51
Connector for room card
Note: Other designations
PCB(1) (Indoor Control PCB)
1) CN14 Connector for Forced operation ON / OFF switch
2) FUSE1 Fuse 3.15A/250VAC
1
2
3
4
PCB
OFF
A
N_RC
ON
ON
35
UNIT MODEL
JS050-C2
J1
J2
DISPLAY SERIES
UNIT MODEL
JS050-C2
ON
B
RC
ON
OFF
33
OFF
ON
26
OFF
OFF
23
PCB MODEL
0011800646D(23)
OFF
OFF
325*/498*
OFF
ON
324*
ON
OFF
387*
ON
ON
317*
DISPLAY MODEL
0011800387D
11
Domestic air conditioner
Printed circuit board connector wiring diagram
PCB(1)
12
Domestic air conditioner
Functions and control
Wiring diagrams
INDOOR UNIT
0010561514
INDOOR UNIT DIAGRAM
M
C0N3
C0N2
CN21
N
FUSE1
T3.15A/250VAC
W
R
C0N1
CN9
CN52
(L)
BL
ION
GENERATOR
FRESH AIR
CN2
WIRED CONTROLLER
CN5'
CN5
UP-DOWN
STEPMOTOR
CN11 CN11'
CN23
S
CN51
CN34
ON
1234
SW2
Y/G
DC FAN MOTOR
CN1
SW1
CN14
CN7
CN6
LEFT STEPMOTOR
ROOM
CARD
WIFI
EMERGENCY
SWITCH
DISPLAY BOARD
AMBIENT TEMP.SENSOR
PIPING TEMP.SENSOR
W
B
CN10
R
RIGHT STEPMOTOR
Y/G
Y/G
1(N)2 (L)3(C)
BR
BL
GND
POWER SUPPLY
TO OUTDOOR UNIT
Notes:
1.The dotted parts are optional.
2.The two pins of CN51 should be shorted,
when the second channel(RC) of SW2 is
selected.
13
R:Red
B:Black
W:White
BL:Blue
Y:Yellow
BR:Brown
Y/G:Yellow/Green
Domestic air conditioner
Functions and control
7.Funcitions and control
7.1 Main functions and control specification
7.1.1 Automatic operation
When the running mode is turned to automation after starting the system, the system will first
determine the running mode according to the current room temperature and then will run according to
the determined mode. Tr in the following selection conditions means room temperature, Ts means
setting temperature, Tp means temperature of indoor coil pipe
TrıTs-3ć
Choose Cooling Mode
Tr˘Ts-3ć
Choose Heating Mode
After turning to the automation mode, the running mode can be switched between cooling mode,
fan mode and heating mode according to the change of the indoor ambient temperature. But the
automatic conversion between cooling mode and heating mode must be conducted after 15 minutes.
7.1.2 Cooling operation mode
Temperature control range: 16ć---30ć
Temperature difference:
r1ć
* Control features: When Tr˄input airflow˅>Ts˄set temperature˅+ temperature Backlash A, the
compressor will be opened, the indoor fan will operate at the set speed and the mode signal will be
sent to the outdoor system. When Tr˄input airflow˅ Ts˄set temperature˅ temperature Backlash
B, the compressor will be shutted, the indoor fan will operate at the set speed and the mode signal will
be sent to the outdoor system. The system will keep the original status if Tr= Ts.
Airflow speed control: (temperature difference 1ć)
Automatic: When Tr”Ts+3ć, high speed.
When Ts+1ć”Tr<Ts+3ć, medium speed
When Tr<Ts+1ć, low speed
When the sensor is off, low speed
When the airflow speed has no delay from the high to low switching, the speed should be delayed for
3 minutes (remain at high speed for 3 minutes.) before the next switch.
Manus: When the system is operating, you can set the high, medium or low speed manually. (When
the sensor is on or off, the system will change the speed 2 seconds after receiving the signal.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or
dehumidifying). When the compressor works continuously for 6 minutes and the temperature of the
indoor coils has been below one centigrade for 10 seconds, the compressor will be stopped and the
malfunction will be recorded in the malfunction list. The indoor system will continue to run. When the
temperature of the indoor coil is raised to 9ć, the compressor will be restarted again (the requirement
of 3 minutes’ delay should be satisfied.)
* timing system on/off function.
* Dormant control function.
14
Domestic air conditioner
Functions and control
7.1.3
Dehumidifying mode.
* temperature control range: 16---30
* temperature difference:
1
Control feature: send the dehumidifying signal to the outdoor system.
When Tr>Ts+2 , the compressor will be turned on, the indoor fan will operate at the set speed.
, the outdoor system will operate at the high dehumidifying
When Tr is between the Ts and Ts+2
frequency for 10 minutes and then at the low dehumidifying mode for six minutes. The indoor fan will
operate at low speed.
When Tr< Ts-1.5
, the outsystem will be stopped, the indoor fan will be stopped for 3 minutes and
then turned to the low speed option.
1
All the frequency converses have a
difference.
(about 2 ℃)
（about
（about
STOP
* Wind speed control: Automatic:
When Tr Ts+ 5 , high speed.
When Ts+3
Tr< Ts+5
, medium speed.
When Ts+2
Tr< Ts+3
, low speed.
When Tr<Ts+2 , light speed.
If the outdoor fan stopped, the indoor fan will be paused for 3 minutes.
If the outdoor fan stopped for more than 3 minutes and the outdoor system still operates, the system
will be changed into light speed mode.
When the airflow speed has no delay from the high to low switching, the speed should be delayed for
3 minutes (remain at high speed for 3 minutes.) before the next switch.
Manual: When the sensor is off or Tr< Ts+3
, the manual operation can not be made. (obligatory
automatic operation.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or
dehumidifying). When the compressor works continuously for 6 minutes and the temperature of the
indoor coils has been below 1
for 10 seconds, the compressor will be stopped and the malfunction
will be recorded in the malfunction list. The indoor system will continue to run. When the temperature
of the indoor coil is raised to 9
, the compressor will be restarted again (the requirement of 3 minutes’
delay should be satisfied.)
* Coil protection (synchronic overheating protection) are installed for the four directions latch
15
Domestic air conditioner
Functions and control
malfunctions when dehumidifying.
* Timing system on/off function.
* Dormant control function.
7.1.4
Heating operation mode.
* temperature control range: 16---30
* temperature difference:
1
* control feature: the temperature compensation is automatically added and the system will send the
heating signals to the outdoor system.
Ts, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode.
If Tr+0.5
If Tr>Ts+1.5 , the outdoor system is turned off, the indoor fan will be at the heat residue sending
mode.
*Indoor fan control
manual control: You can choose high, medium, low and automatic speed control.
Automatic: When Tr<Ts, high speed.
When Ts Tr Ts+2 , medium speed.
When Tr> Ts+2 , low speed.
When the airflow speed has no delay from the high to low switching, the speed should be delayed for
3 minutes (remain at high speed for 3 minutes.) before the next switch.
*Airgate location control: the location for the airgate can be set according to your needs.
Coldair proof operation
1. The fan control functions as below:
set
medium speed
37
37
35
low speed
35
25
25
light speed
16
stop
* Residue heat sending. The indoor fan will send the residue heat at a low speed for 20 seconds.
If other conditions are satisfied, when the compressor stops, the indoor system will operate at a light
speed. The indoor fan will stop when the coil temperature is below the THHOT0.
* Defrosting. When the system receives the defrosting signal from outdoors, the indoor fan will stop
and the indoor temperature display won’t change. At the time, any indoor coil malfunctions will be
neglected. When the outdoor defrosting finishes, the coil malfunction will still be neglected until the
compressor has been started up for 30 seconds. The indoor temperature display will not change and
the system operates at the cold air proof mode.
* Automatic heating temperature compensation: when the system enters the heating mode, the
16
Domestic air conditioner
Functions and control
temperature compensation (4ć) will be added. When the status is switched off, the compensation will
be erased.
7.1.5
Strength operation
The system enters the mode after receiving the ‘strength signal’.
Send strength operation signal to the outdoor system.
The mode change finishes the strength operation.
Entering ‘mute’, you can have normal operation or signal control such as timing to finish the strength
operation.
When the system is at the automatic option with the strength/ mute function, if the system enters the
cooling mode, the cooling strength/ mute function will be offered; if the system enters the heating
mode, then the heating strength/ mute function will be offered; if the system enters the airflow mode,
there will be no strength/ mute function.
7.1.6 Mute operation
The system enters the mode after receiving the ‘mute signal’.
a. Mute heating: the airflow speed is slight, the system sends the mute signal to the outdoor system.
b. mute cooling: the airflow speed is slight, the system sends the mute signal to the outdoor system.
When the compressor operates, the airflow speed is mute speed. EEPROM is adaptable.
Mute operation can not work under the dehumidifying and airflow-sending operation.
7.1.7 Air refreshing˄This model does not choose˅
After receiving the signal from the remote control, (HV series: the background light of the ‘health’ logo
is green. HS series: the ‘health’ indicator will be lighted). If the fan operates, the Nano-Aqua operates
to realize the ions sending function.
If the indoor fan stops, the Nano-Aqua is turned off.
When the Nano-Aqua is turned off, if the air refreshing system is turned on, the Nano-Aqua will be
turned on when the fan operates.
7.1.8 Timing
You can set 24 hours’ on/off timing accordingly. After the setting, the timing indicator will be lightened.
Also, the light will be turning off after the timing is finished. The followings are several timing methods.
1.system /on timing: The timing indicator will be lightened and the indoor system is under the waiting
mode. The light will be turned off when the timing is finished and the rest of the system will operate
under a normal condition. The timing starts since the last reception of the timing signal.
2.system /off timing: When the system is turned on, the timing indicator is lightened, the rest of the
system will operated under a normal condition. When set time comes, the indicator light will be turned
off and the system will be turned off. If you have set the dormant functions, the order of your settings
will be operated according to the timing settings.
3 .system /on and off timing: The settings will be completed according to the orders..
17
Domestic air conditioner
Functions and control
7.1.9 Dormant operation
The dormant timing is an eight hours unadaptable one. The timing signs are shown on the V series
board. (RC series show the dormant signal, the timing light is lighted on the 6 lights board).
2.1 Under the cooling/ dehumidifying operation, after the setting of the dormant operation, the set
temperature will be raised for 1 centigrade after 1 hour’s operation and will be raised for 1 centigrade
1 hour later. The system will keep this status for 6 hours and then close.
2.2 Under the heating mode, after the setting of the dormant operation, the setting temperature will fall
2 centigrade after 1 hour’s operation and will fall 2 centigrade 1 hour later. 3 hours after the preceding
operations, the set temperature will be raised for 1 centigrade and the system will keep this status for
3 hours and then close down.
2.3 During the dormant time, except the change of the system mode or a new press on the dormant
setting keys, the timing of the 8 hours dormancy will take the first timing as the start time, any presses
on other keys will not affect the original timing.
2.4 Indoor fan control under the dormant operation.
If the indoor fan is at the high speed before the dormant operation setting, the speed will be turned to
medium after the setting. If the fan is at the medium speed before the dormant setting, the speed will
be turned to low after the setting. If the fan is at the low speed before the dormant setting, the speed
will not change.
7.1.10 Urgent on/off input
Press the urgency button the buzzer will ring. The system will enter the automatic mode if you don’t
press the button for more than 5 seconds.
Under the system off mode, if you press the urgency key for 5 to 10 seconds, the system will start the
test operation.
Under the system off mode, if you press the urgency key for 10 to 15 seconds, the display screen will
show the resume of the last malfunction.
If the system is under operation, the press on the urgency key will stop it.
Under the system off mode, the display screen will show automatic running sign.
Under the system off mode, the system will not receive the remote control signal if the press on the
urgency key doesn’t last for 15 seconds or if the key is loosened.
Urgency operation: If you press the urgency key for less than 5 seconds, the buzzer will ring when you
press the on/off key. The system will enter the urgency operation when the urgency key is loosened.
The urgency operation is fully automatic.
Test operation.
The inlet temperature sensor doesn’t work, the indoor fan and the indoor air direction board motor
works synchronically. High speed airflow, cooling, outdoor system on, etc, will send the ambient
temperature 30 centigrade and coil temperature 16 centigrade information to the outdoor system.
Test operation
The defrost protection of the evaporator doesn’t work.
The temperature control doesn’t work.
The test operation will be finished in 30 minutes.
The test operation can be stopped by the relative commands from the remote control.
18
Domestic air conditioner
Functions and control
7.1.11 Low load protection control
In order to prevent the frosting of the indoor heat interaction device, the outdoor system will be
stopped if the indoor heat interaction temperature is below 1ć centigrade for 5 minutes, but the fan
will continue to operate. The outdoor system will be started again when the heat interaction
temperature is above 9 centigrade and the system has been stopped for 3 minutes. The malfunction
will be stored in the malfunction resume and will not be revealed
7.1.12 High load protection control
The outdoor system will be stopped if the coil temperature is above 63ć for 2 minutes. The indoor
fan will be controlled by the thermostat. The outdoor system can be restarted when the coil
temperature is below 45ć and the system has been stopped for 3 minutes. The malfunction will be
stored in the malfunction resume and will not be revealed.
7.1.13 Abnormal operation of indoor system
When the outdoor system operates, if the indoor system operation differs from the outdoor system,
the abnormal operation malfunction will be reported. 10s after the report, the indoor system will be
closed.
Outdoor system mode
Indoor system mode
conflicts
cooling
heating
yes
cooling
cooling
no
cooling
airflow
no
heating
heating
no
heating
airflow
yes
heating
cooling
yes
7.1.14 Malfunction list resume.
Nothing is presented if there is no code list.
The malfunction display will automatically finish in 10 seconds.
The remote control only receives the signals for stop. According to the signals, the malfunction
resume presentation finishes.
The resume restores after the power supply restores.
7.1.15 Abnormality confirmation approaches
1. indoor temperature sensor abnormality:
Under the operation, the normal temperature ranges from 120 degree to -30 degree. When the
temperature goes beyond this range, the abnormality can be confirmed. If the temperature goes back
into the range, the system will automatically resume.
2 .indoor heat interaction sensor abnormality:
Under the operation, the normal temperature ranges from 120 degree to -30 degree. When the
temperature goes beyond this range, the abnormality can be confirmed. If the temperature goes back
into the range, the system will automatically resume.
19
Domestic air conditioner
Functions and control
3 .indoor malfunction:
Out door malfunction: When the indoor system receives the outdoor malfunction codes, it will store
the code into E2 for the malfunction list resume. The indoor system will continue to operate according
to the original status, the malfunction code will not be revealed or processed.
4. transmission abnormality:
If the indoor system can’t receive the outdoor system for 8 minutes, the communication abnormality
can be confirmed and reported and the outdoor system will be stopped.
7.1.16 Single indoor system operation
* Enter condition: First, set the high speed airflow and 30 centigrade set temperature, then press the
dormant keys for 6 times within 7 seconds, the system will feedback with 6 rings.
* After the system enters the separate indoor system operation mode, the indoor system will operate
according to the set mode and neglect the communication signals of the outdoor system. However, it
has to send signals to the outdoor system.
* Quitting condition: This mode can be quitted after receiving the quitting signal from the remote
control or urgency system. The indoor system thus can quit the single operation mode.
7.1.17 Power cut compensation
* Entering condition: Press dormant button 10 times within 7 second, the buzzer will ring 4 times and
the present system status will be stored into the EEPROM of the indoor system.
* After entering the power cut compensation mode, the processing of the indoor system should be as
the followings:
Remote control urgency signal: operate according to the remote control and the urgent conditions,
the present status will be stored into the EEPROM of the indoor system.
* Quitting conditions: Press dormant button 10 times within 7 seconds and the buzzer will ring twice.
7.1.18 Test program
First, connect the test program terminal on the mainboard. Then connect the system to the power
circuit. The test program will operate as follows.
HV series display: The buzzer rings for one time—the signal will be sent to outdoor system for 0.5
second— the violet is sent for 0.5-- the background light turns to white—the back ground light turns to
white—the background light turns to white—the background light is fully lighted for 0.5 second—LED
screen lights for 0.5 second— the step-in motor fully output for 0.5 second—then the motor doesn’t
output for 0.5 second—the motor fully output again for 0.5 second. The test program finishes.
7.1.19 Time cutting function:
Connect the test program terminal on the mainboard after connecting the system to the power circuit.
The CPU of the main control will be 60 times faster.
7.2 Value of thermistor
Room sensor and Pipe Sensor
20
Domestic air conditioner
Functions and control
R25ć=10K¡f2%
B25ć/50ć=3700Kf2%
Temp.((ć))
Max.(Kȍ)
Normal(Kȍ)
Min.(Kȍ)
-30
165.2170
147.9497
132.3678
-1.94
1.75
-29
155.5754
139.5600
125.0806
-1.93
1.74
-28
146.5609
131.7022
118.2434
-1.91
1.73
-27
138.1285
124.3392
111.8256
-1.89
1.71
-26
130.2371
117.4366
105.7989
-1.87
1.70
-25
122.8484
110.9627
100.1367
-1.85
1.69
-24
115.9272
104.8882
94.8149
-1.83
1.67
-23
109.4410
99.1858
89.8106
-1.81
1.66
-22
103.3598
93.8305
85.1031
-1.80
1.64
-21
97.6556
88.7989
80.6728
-1.78
1.63
-20
92.3028
84.0695
76.5017
-1.76
1.62
-19
87.2775
79.6222
72.5729
-1.74
1.60
-18
82.5577
75.4384
68.8710
-1.72
1.59
-17
78.1230
71.5010
65.3815
-1.70
1.57
-16
73.9543
67.7939
62.0907
-1.68
1.55
-15
70.0342
64.3023
58.9863
-1.66
1.54
-14
66.3463
61.0123
56.0565
-1.64
1.52
-13
62.8755
57.9110
53.2905
-1.62
1.51
-12
59.6076
54.9866
50.6781
-1.60
1.49
-11
56.5296
52.2278
48.2099
-1.58
1.47
-10
53.6294
49.6244
45.8771
-1.56
1.46
-9
50.8956
47.1666
43.6714
-1.54
1.44
-8
48.3178
44.8454
41.5851
-1.51
1.42
-7
45.8860
42.6525
39.6112
-1.49
1.40
-6
43.5912
40.5800
37.7429
-1.47
1.39
-5
41.4249
38.6207
35.9739
-1.45
1.37
-4
39.3792
36.7676
34.2983
-1.43
1.35
-3
37.4465
35.0144
32.7108
-1.41
1.33
-2
35.6202
33.3552
31.2062
-1.38
1.31
-1
33.8936
31.7844
29.7796
-1.36
1.29
0
32.2608
30.2968
28.4267
-1.34
1.28
1
30.7162
28.8875
27.1431
-1.32
1.26
2
29.2545
27.5519
25.9250
-1.29
1.24
3
27.8708
26.2858
24.7686
-1.27
1.22
4
26.5605
25.0851
23.6704
-1.25
1.20
5
25.3193
23.9462
22.6273
-1.23
1.18
6
24.1432
22.8656
21.6361
-1.20
1.16
7
23.0284
21.8398
20.6939
-1.18
1.14
8
21.9714
20.8659
19.7982
-1.15
1.12
9
20.9688
19.9409
18.9463
-1.13
1.09
22
Tolerance(ć)
Domestic air conditioner
Functions and control
10
20.0176
19.0621
18.1358
-1.11
1.07
11
19.1149
18.2270
17.3646
-1.08
1.05
12
18.2580
17.4331
16.6305
-1.06
1.03
13
17.4442
16.6782
15.9315
-1.03
1.01
14
16.6711
15.9601
15.2657
-1.01
0.99
15
15.9366
15.2770
14.6315
-0.98
0.96
16
15.2385
14.6268
14.0271
-0.96
0.94
17
14.5748
14.0079
13.4510
-0.93
0.92
18
13.9436
13.4185
12.9017
-0.91
0.90
19
13.3431
12.8572
12.3778
-0.88
0.87
20
12.7718
12.3223
11.8780
-0.86
0.85
21
12.2280
11.8126
11.4011
-0.83
0.83
22
11.7102
11.3267
10.9459
-0.81
0.80
23
11.2172
10.8634
10.5114
-0.78
0.78
24
10.7475
10.4216
10.0964
-0.75
0.75
25
10.3000
10.0000
9.7000
-0.75
0.75
26
9.8975
9.5974
9.2980
-0.76
0.76
27
9.5129
9.2132
8.9148
-0.80
0.80
28
9.1454
8.8465
8.5496
-0.84
0.83
29
8.7942
8.4964
8.2013
-0.87
0.86
30
8.4583
8.1621
7.8691
-0.91
0.90
31
8.1371
7.8428
7.5522
-0.95
0.93
32
7.8299
7.5377
7.2498
-0.98
0.97
33
7.5359
7.2461
6.9611
-1.02
1.00
34
7.2546
6.9673
6.6854
-1.06
1.04
35
6.9852
6.7008
6.4222
-1.10
1.07
36
6.7273
6.4459
6.1707
-1.13
1.11
37
6.4803
6.2021
5.9304
-1.17
1.14
38
6.2437
5.9687
5.7007
-1.21
1.18
39
6.0170
5.7454
5.4812
-1.25
1.22
40
5.7997
5.5316
5.2712
-1.29
1.25
41
5.5914
5.3269
5.0704
-1.33
1.29
42
5.3916
5.1308
4.8783
-1.37
1.33
43
5.2001
4.9430
4.6944
-1.41
1.36
44
5.0163
4.7630
4.5185
-1.45
1.40
45
4.8400
4.5905
4.3500
-1.49
1.44
46
4.6708
4.4252
4.1887
-1.53
1.47
47
4.5083
4.2666
4.0342
-1.57
1.51
48
4.3524
4.1145
3.8862
-1.61
1.55
49
4.2026
3.9686
3.7443
-1.65
1.59
50
4.0588
3.8287
3.6084
-1.70
1.62
51
3.9206
3.6943
3.4780
-1.74
1.66
52
3.7878
3.5654
3.3531
-1.78
1.70
23
Domestic air conditioner
Functions and control
53
3.6601
3.4416
3.2332
-1.82
1.74
54
3.5374
3.3227
3.1183
-1.87
1.78
55
3.4195
3.2085
3.0079
-1.91
1.82
56
3.3060
3.0989
2.9021
-1.95
1.85
57
3.1969
2.9935
2.8005
-2.00
1.89
58
3.0919
2.8922
2.7029
-2.04
1.93
59
2.9909
2.7948
2.6092
-2.08
1.97
60
2.8936
2.7012
2.5193
-2.13
2.01
61
2.8000
2.6112
2.4328
-2.17
2.05
62
2.7099
2.5246
2.3498
-2.22
2.09
63
2.6232
2.4413
2.2700
-2.26
2.13
64
2.5396
2.3611
2.1932
-2.31
2.17
65
2.4591
2.2840
2.1195
-2.36
2.21
66
2.3815
2.2098
2.0486
-2.40
2.25
67
2.3068
2.1383
1.9803
-2.45
2.29
68
2.2347
2.0695
1.9147
-2.49
2.34
69
2.1652
2.0032
1.8516
-2.54
2.38
70
2.0983
1.9393
1.7908
-2.59
2.42
71
2.0337
1.8778
1.7324
-2.63
2.46
72
1.9714
1.8186
1.6761
-2.68
2.50
73
1.9113
1.7614
1.6219
-2.73
2.54
74
1.8533
1.7064
1.5697
-2.78
2.58
75
1.7974
1.6533
1.5194
-2.83
2.63
76
1.7434
1.6021
1.4710
-2.88
2.67
77
1.6913
1.5528
1.4243
-2.92
2.71
78
1.6409
1.5051
1.3794
-2.97
2.75
79
1.5923
1.4592
1.3360
-3.02
2.80
80
1.5454
1.4149
1.2942
-3.07
2.84
81
1.5000
1.3721
1.2540
-3.12
2.88
82
1.4562
1.3308
1.2151
-3.17
2.93
83
1.4139
1.2910
1.1776
-3.22
2.97
84
1.3730
1.2525
1.1415
-3.27
3.01
85
1.3335
1.2153
1.1066
-3.32
3.06
86
1.2953
1.1794
1.0730
-3.38
3.10
87
1.2583
1.1448
1.0405
-3.43
3.15
88
1.2226
1.1113
1.0092
-3.48
3.19
89
1.1880
1.0789
0.9789
-3.53
3.24
90
1.1546
1.0476
0.9497
-3.58
3.28
91
1.1223
1.0174
0.9215
-3.64
3.33
92
1.0910
0.9882
0.8942
-3.69
3.37
93
1.0607
0.9599
0.8679
-3.74
3.42
94
1.0314
0.9326
0.8424
-3.80
3.46
95
1.0030
0.9061
0.8179
-3.85
3.51
24
Domestic air conditioner
Functions and control
96
0.9756
0.8806
0.7941
-3.90
3.55
97
0.9490
0.8558
0.7711
-3.96
3.60
98
0.9232
0.8319
0.7489
-4.01
3.64
99
0.8983
0.8088
0.7275
-4.07
3.69
100
0.8741
0.7863
0.7067
-4.12
3.74
101
0.8507
0.7646
0.6867
-4.18
3.78
102
0.8281
0.7436
0.6672
-4.23
3.83
103
0.8061
0.7233
0.6484
-4.29
3.88
104
0.7848
0.7036
0.6303
-4.34
3.92
105
0.7641
0.6845
0.6127
-4.40
3.97
106
0.7441
0.6661
0.5957
-4.46
4.02
107
0.7247
0.6482
0.5792
-4.51
4.07
108
0.7059
0.6308
0.5632
-4.57
4.12
109
0.6877
0.6140
0.5478
-4.63
4.16
110
0.6700
0.5977
0.5328
-4.69
4.21
111
0.6528
0.5820
0.5183
-4.74
4.26
112
0.6361
0.5667
0.5043
-4.80
4.31
113
0.6200
0.5518
0.4907
-4.86
4.36
114
0.6043
0.5374
0.4775
-4.92
4.41
115
0.5891
0.5235
0.4648
-4.98
4.45
116
0.5743
0.5100
0.4524
-5.04
4.50
117
0.5600
0.4968
0.4404
-5.10
4.55
118
0.5460
0.4841
0.4288
-5.16
4.60
119
0.5325
0.4717
0.4175
-5.22
4.65
120
0.5194
0.4597
0.4066
-5.28
4.70
25
Domestic air conditioner
Service diagnosis
8.Dimensional
285
unit:mm
318
513
644
225
1008
9.Center of gravity
unit:mm
1008
225
431.5
318
147.5
99
Domestic air conditioner
26
Service diagnosis
10. Service Diagnosis
10.1 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.
Parameter of primary electronic appliance
NO
1
N am e
F an m otor
P a r a m e te r
P ic t u r e
R ated voltage: DC310V
R ated current:0 .2A
R ated frequenc y:
-
10.2 Problem Symptoms and Measures
Symptom
None of the units
operates
Operation
sometimes stops.
Check Item
Check the power supply.
Check the indoor PCB
Check the power supply.
Details of Measure
Check to make sure that the rated voltage is supplied.
Check to make sure that the indoor PCB is broken
A power failure of 2 to 10 cycles can stop air conditioner
operation.
Set the units to cooling operation, and compare the
Equipment
operates but does
not cool, or does
not heat (only for
heat pump)
Check for faulty operation
temperatures of the liquid side connection pipes of the
of the electronic
connection section among rooms to check the opening and
expansion valve.
closing operation of the electronic expansion valves of the
individual units.
Diagnosis by service port
pressure and operating
Check for insufficient gas.
current.
Large operating Check the
noise
and condition.
vibrations
Check to make sure that the required spaces for
installation installation
(specified in the Technical Guide, etc.) are
provided.
27
Domestic air conditioner
Service diagnosis
10.3 Error Codes and Description indoor display
Code indication
Indoor displaying panel code indication
Only For 498 and
Outdoor
498A display
(LED1 flash
Other display
(Red/Green Time
times)
Run □On★Flash■
Off)
Indoor and
Outdoor
E7
E1
Indoor
E2
Malfunction E4
E14
E5
E9
F12
F1
F22
Directly display
Directly display
Directly display
Directly display
Directly display
Trouble record
Trouble record
Directly display
Directly display
Directly display
F3
F20
Directly display
Trouble record
F19
Trouble record
F27
Directly display
F4
F8
F21
F7
Directly display
Trouble record
Directly display
Directly display
Outdoor
Malfunction F6
Directly display
F25
F13
F14
F11
F28
Directly display
Trouble record
Trouble record
Directly display
Directly display
F15
Trouble record
F2
Trouble record
F23
F9
F24
F34
F35
F43
Trouble record
Trouble record
Trouble record
Trouble record
Trouble record
/
■
■ ★
15
★
★
★
■
□
□
■
□
★
■
□
□
□
■
■
★
★
★
■
□
★
★
★
★
■
★
■
/
/
/
/
22
21
1
2
3
■
★ ■
4
■
★ □
5
■
★ □
6
■
★ ■
7
■
★ ■
8
■
□
■
★ □
□ ★
★ ■
9
10
11
□
★ ■
12
★
□ ■
13
■
■
■
■
★
★
★
★
□
□
■
■
16
17
18
19
■
★ □
20
■
★ □
24
■
★ □
25
/
■ ★
/
★ □
★ ■
26
27
37
38
46
★
■
■
28
fault description
Communication fault between
indoor and outdoor units
Indoor temperature sensor failure
Indoor coil sensor failure
Indoor eeprom failure
Indoor fan failure
Internal unit antifreeze protection
Internal unit overload
Eeprom failure
IPM failure
AC current overcurrent protection
Communication error between
module board and main PCB
board.
High pressure protection
Power over/under voltage
protection
Compressor stall / press
instantaneous stop
Compressor discarging
temperature protection
Abnormal of DC motor
Abnormal of piping sensor
Suction temperature sensor failure
Abnormal of outdoor ambient
sensor
Abnormal of compressor
discharge sensor
Lack of refrigerant
4-way valve reverse failure
Compressor jam (only for spdu)
Module PWM select circuit error
Outdoor terminal block
temperature protection
Instantaneous over-current
protection of the compressor
Compressor U-phase overcurrent
Compressor V-phase overcurrent
Compressor W-phase overcurrent
Module reset
CT disconnection
Outdoor coil protection
Compressor driver board failure
Model matching abnormality
Reference
Page
Page.39
Page.29
Page.29
Page.30
Page.31
/
Page.42
Page.30
Page.34
Page.35
Page.36
/
Page.37
/
Page.38
Page.32
Page.29
Page.29
Page.29
Page.29
/
/
Page.41
Page.41
/
Page.35
Page.35
/
/
/
/
/
Domestic air conditioner
Service diagnosis
10.3.1 Thermistor or Related Abnormality
ƾƵƵE1: Room temperature sensor failure
ƾƶƶE2: Heat-exchange sensor failure
LED1 flash 10 times˖Defrost temperature sensor failure
LED1 flash 11 times˖Suction temperature sensor failure
LED1 flash 12 times˖Ambient temperature sensor failure
LED1 flash 13 times˖Discharge temperature sensor failure
Indoor Display
Outdoor display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
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
operation.
z
Note: The values vary slightly in some models
Supposed
Causes
Ŷ Faulty connector connection
Ŷ Faulty thermistor
Ŷ Faulty PCB
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
else parts damage may be occurred.
or
Check the connector connection.
NO
Correct the connection
Is it normal?
Yes
Thermistor resistance check
NO
Replace the thermistor
Is it normal?
Yes
Replace the indoor unit PCB
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.
29
Domestic air conditioner
Service diagnosis
10.3.2 EEPROM abnormal
Indoor Display
Indoor display
ƾƶƾE4: Indoor EEPROM error
ƵƾƵ F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times
Method of
Malfunction
Detection
The Data detected by the EEPROM are used to determine MCU
Malfunction
Decision
Conditions
When the data of EEPROM is error or the EEPROM is damaged
Supposed
Causes
Troubleshooting
Ŷ Faulty EEPROM data
Ŷ Faulty EEPROM
Ŷ Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
Replace the indoor or outdoor mainboard.
30
Domestic air conditioner
Service diagnosis
10.3.3 Indoor AC fan motor malfunction
Indoor Display
ƵƶƾE14
Method of
Malfunction
Detection
The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation
Malfunction
Decision
Conditions
when the detected rotation feedback signal don’t received in 2 minutes
Ŷ Operation halt due to breaking of wire inside the fan motor.
Ŷ Fan motor overheat protection
Ŷ Operation halt due to breaking of the fan motor lead wires
Ŷ Detection error due to faulty indoor unit PCB
* Caution Be sure to turn off power switch before connect or disconnect connector, or else
Troubleshooting
parts damage may be occurred.
Supposed
Causes
Pull out the terminals on the indoor
mainboard and reinsert them.
1R
Check whether terminals
on indoor pcb is well ?
<HV
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
12
Yes
<HV
check whether motor can run
when turn on the unit
Measure whether there is voltage pulse (0-5VDC)
between the positions middle wire and black wire
of Terminal CN2 on the indoor PCB
Is it ok?
12
12
<HV
the indoor motor is damaged and need replace
the indoor pcb is damaged and need replace
31
Domestic air conditioner
Service diagnosis
10.3.4 Outdoor DC fan motor fault
Outdoor display
Ƶƾƶ)LED1 flash 9 times
Method of
DC fan motor is detected by checking the fan running condition and so on
Malfunction
Detection
Malfunction
Decision
Conditions
when the data of EEPROM
is error or
the EEPROM
is damaged
Supposed
Ƶ DC fan motor protection dues to the DC fan motor faulty
Causes
Ƶ DC fan motor protection dues to faulty PCB
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
may be occurred.
32
or parts damage
Domestic air conditioner
Service diagnosis
Check whether Terminal on the outdoor
mainboard is well inserted.
NO
it is normal
Reinsert the terminals
YES
Electrify the machine again and turn it on in
the Cool state with the remote controller.
check whether the motor could run.
The motor and
outdoor pcb are
well
YES
NO
R emove fan motor a f t e r s witch off
the power.Measure the resistances
between black line(0V) and red
line( 310V),between black line(0V)
an d w h i t e l i ne ( 1 5 V ) of the fan
motor .
The resistances are
greater than 40K¡
YES
the resistances between 0V
and 310V,between 0V and 15V of
the fan terminal of outdoor pcb are
greater than 10M¡.
YES
The module pcb is
damaged, replace it
with a new one.
NO
The motor of the outdoor unit is
damaged and needs replacing.
NO
The outdoor pcb is
damaged, replace it
with a new one.
33
Domestic air conditioner
Service diagnosis
10.3.5 IPM protection
Outdoor display:
ƶ ƾ ƾ/ F1 LED1 flash 2 times
Method of
Malfunction
Detection
IPM protection is detected by checking the compressor running condition and so on
Malfunction
Decision
Conditions
Ŷ The system leads to IPM protection due to over current
Ŷ The compressor faulty leads to IPM protection
Ŷ circuit component of IPM is broken and led to IPM protection
Supposed
Causes
Ŷ IPM protection dues to the compressor faulty
Ŷ IPM protection dues to faulty PCB of IPM module
Ŷ Compressor wiring disconnected
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
else parts damage may be occurred.
<(6
or
12
34
<(6
12
Domestic air conditioner
Service diagnosis
10.3.6 Over-current of the compressor
Outdoor Display:
ƵƾƶF2 LED1 flash 3 or 24 or 25 times
Method of
Malfunction
Detection
The current of the compressor is too high
Malfunction
Decision
Conditions
when the IPM Module is damaged
or the compressor is damaged.
power supply voltage is too low or too high
Supposed
Causes
Troubleshooting
Ŷ Faulty IPM Module
Ŷ Faulty compressor
Ŷ Faulty power supply
* Caution Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
Electrify the machine again and turn it on
with the remote controller, If malfunctions
are reported before or upon the compressor
being started up,
YES
IPM Module is damaged and
needs replacing.
NO
The compressor is started normally, but
malfunctions are reported after it has
run for some time. Check the power
supply is too low or too high
Yes
Repair the power supply
NO
NO
The system may have been over or under
charged with gas, which can be judged through
the pressure of the measuring system.
35
Domestic air conditioner
Service diagnosis
10.3.7 The communication fault between IPM and outdoor PCB
Outdoor display:
ƵƾƵ)LED1 flash 4 times
Method of
Malfunction
Detection
Communication is detected by checking the IPM module and the outdoor PCB
Malfunction
Decision
Conditions
Ŷ The outdoor PCB broken leads to communication fault
Ŷ The IPM module broken leads to communication fault
Ŷ The outdoor PCB is broken
Ŷ The IPM module is broken
Ŷ Communication wiring disconnected
Supposed
Causes
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
parts damage may be occurred.
or else
1) Check whether Terminal CN23 and CN24 on the outdoor mainboard
CN10 and CN11 on IPM module
2) Check whether the connected wire between IPM and outdoor
NO
1) Pull out and reinsert the terminals.
2) Replace connected wire
Are they good?
Malfunction unsolved
YES
Electrify the machine again and turn it
on, Check whether the voltage between
1 and 2 of Terminal CN23 is about DC5V,
Check whether the voltage between2
and 3 of Terminal CN23 is about DC15V,
YES
Replace the outdoor IPM module
with a new one.
NO
Replace the outdoor mainboard with a new one
36
Domestic air conditioner
Service diagnosis
10.3.8 Power Supply Over or under voltage fault
Outdoor display: Ƶƾƶ) LED1 flash 6 times
The power supply is over voltage
Method of
Malfunction
Detection
An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit.
Malfunction
Decision
Conditions
An voltage signal is fed from the voltage detection circuit to the microcomputer
Ŷ Supply voltage not as specified
Ŷ the IPM module is broken
Ŷ the outdoor PCB is broken
Supposed
Causes
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
Electrify the machine again and turn it on with
the remote controller. Check whether the
compressor is started normally
Yes
Is it ok?
Maybe there is some disturbance
No
Yes
Test the outdoor power supply
(+310VDC) with a multimeter.
check whether the power
is >150 V or <390V?
Change the IPM module
NO
Yes
Change the IPM module
~230 is ok?
NO
This question may be caused by the power. Repair
the power supply.
37
Domestic air conditioner
Service diagnosis
10.3.9 Overheat Protection For Discharge Temperature
Outdoor display: ƵƾƵ F4 LED1 flash 8 times
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
The Discharge temperature control is checked with the temperature being detected
by the Discharge pipe thermistor
when the compressor discharge temperature is above 110ć
Ŷ Electronic expansion valve defective
Ŷ Faulty thermistor
Ŷ Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector,
else parts damage may be occurred.
or
Electrify the machine again and turn it on with the remote controller,
then measure the temperature at the exhaust temperature sensor of
the compressor on the outdoor unit
The temperature exceeds
110 ć shortly after the
machine starts up?
1) The cryogen may have been leaked during
installation, or there may be leakage in the piping
system.
2) There may be other causes to make the exhaust
temperature too high.
YES
NO
Malfunctions occur after running for some time even
though the measured temperature is below 110ć. Pull
out the exhaust sensor and measure its resistance at
standard
temperatures
according
to
the
resistance-temperature table
YES
The
results
much?
The sensor is damaged. Replace the sensor
with a new one.
deviate
NO
The outdoor mainboard is damaged and needs be
replaced
38
Domestic air conditioner
Service diagnosis
10.3.10 The communication fault between indoor and outdoor
Indoor display
outdoor display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
ƵƵƾ E7
LED1 flash 15 times
Communication is detected by checking the indoor PCB and the outdoor PCB.
Ŷ The outdoor PCB broken leads to communication fault.
Ŷ The indoor PCB broken leads to communication fault.
Ŷ
Ŷ
Ŷ
Ŷ
Communication wiring disconnected.
The indoor PCB is broken.
The outdoor PCB is broken.
The Module PCB is broken.
* Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
39
Domestic air conditioner
Service diagnosis
40
Domestic air conditioner
Service diagnosis
10.3.11 Loss of synchronism detection
Inverter
side current detection is abnormal
Outdoor Display
ƵƾƵ?)LED1 flash 18 times
ƵƾƵ?) LED1 flash 19 times
Method of
Malfunction
Detection
The position of the compressor rotor can not detected normally
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
when the wiring of compressor is wrong or the connection is poor;
or the compressor is damaged
Ƶ Faulty The wiring of compressor
Ƶ Faulty compressor
Ƶ Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
NO
Within 3 minutes after the machine is
supplied with power and turned on with
the remote controller, check whether
the compressor can start up
1. The wiring of compressor is incorrect
or the connection is poor;
2. The compressor is damaged
YES
YES
At first, the compressor start up ,soon the
compressor stopped with the LED1 on the
outdoor PCB blinks˄1Hz˅19/18 times
IPM Module is damaged and needs
replacing.
Malfunction unsolved
the
Maybe there is some disturbance
41
Malfunctions exist also, the
compressor is damaged replace a
new one
Domestic air conditioner
Service diagnosis
10.3.12 High work-intense protection
ƾƾƾ?( LED1 flash 21 times
Outdoor display
Method of
Malfunction
Detection
High work-intense control is activated in the heating mode if the temperature
being sensed by the heat exchanger thermistor exceeds the limit.
Malfunction
Decision
Conditions
Activated when the temperature being sensed by the heat exchanger
rises above 65ć twices in 30 minutes.
Ƶ
Ƶ
Ƶ
Ƶ
Supposed
Causes
Troubleshooting
Faulty electronic expansion valve
Dirty heat exchanger
Faulty heat-exchange sensor
Insufficient gas
* Caution Be sure to turn off power switch before connect or disconnect connector,
else parts damage may be occurred.
or
Electrify the machine again and turn it on with the
remote controller, check whether the wind
temperature is below 65ć
The malfunction is reported
after the machine has run
for some time?
YES
1 ǃ Check room temperature and
pipe temperature sensor.
2ǃthe temperature monitoring circuit
of the indoor mainboard
NO
The indoor unit blows poorly
due to blocked filters or poor
condition of the fan?
YES
1) Clean the filters
2) Reinstall the fan.
NO
Use some tools to measure the pressure of systemˈ
42
Domestic air conditioner
Circuit Diagra
ams
11 Circcuit Diag
grams
43
Doomestic air conditionerr
Circuit Diagra
ams
44
Doomestic air conditionerr
REMOVAL PROCEDURE
WARNING
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
Version V1
Date 2020-11-14
Removal Procedure
Removal of front panel
Indoor unit
Step
Procedure
Points
1.Features
2.Remove the front panel
1
Hold the front panel
by the tabs on the both
sides and lift it
1
Domestic air conditioner
Removal Procedure
Step
2
3
Procedure
Loosen the screw and
lift
up the casing cover
Points
Loosen the screw
Loosen the screw and
lift up the control box
cover
Loosen the screw
2
Domestic air conditioner
Removal Procedure
Remove the air filters and horizontal flap
Step
6
Procedure
Points
Pull the Harness out of
the control box and then
release the pivots on
both sides of the unit
to remove the front
panel
Remove the air filters
1
Lift an air filter upwards
slightly and then pull it
out downwards
Remove the horizontal flap
■ The horizontal
flap is Single
1
Release the side of pivot
and then Release the
Center of the pivot.
Bend the horizontal
blade slightly and
remove it.
3
Domestic air conditioner
Removal Procedure
Remove the casing
Step
Procedure
1
Release the screw
covers(3EA)
2
Loosen the marked
Screw (7EA)
4
Points
Domestic air conditioner
Removal Procedure
Step
Procedure
Points
Holes（4EA）
3
■When assembling,
install the front
grille horizontally
so as not to stuff
the flap inside.
■When assembling,
make sure the four
hooks are caught
properly.
Release the marked
hooks (4EA) and then
Pull the front grille out
Horizontally and
remove it
HOOK（4EA）
5
Domestic air conditioner
Removal Procedure
Release stepping motor and control box
Step
Procedure
Points
Hooks (3EA)
1
2
Release the top cover
of the control box
hooks
and
then
remove it.
Pull the Harness out
of the PCB unit and
then
Loosen
the
control
Box screws (2EA) .
Pull the control box
from of the frame and
remove it.
Loosen screws (2EA)
Harness:
Stepping motor and
fan motor harness
6
Domestic air conditioner
Removal Procedure
Release stepping motor and control box
Step
3
Procedure
Points
Loosen the stepping
motor screws (2EA),
and then Release the
stepping motor
7
Domestic air conditioner
Removal Procedure
Removal of Heat Exchanger
Step
1
Procedure
Points
Loosen the marked
screws(2EA)
Loosen the Screws (2EA)
2
Pull mounting plate
and heat exchanger
bracket out from
Hook of the base
frame
and
then
release them.
8
Domestic air conditioner
Removal Procedure
Step
3
Procedure
Points
Release the fixture
plate from the base
frame hook and
remove it.
9
Domestic air conditioner
Removal Procedure
Step
4
Procedure
Points
Loosen the marked
screws (7EA).
And then Remove the
heat exchanger
Remove Fan Motor
1
Loosen the marked
screws(4EA) and
release the cover of
fan motor
10
Domestic air conditioner
Removal Procedure
Step
1
Procedure
Points
Loosen the marked
screw (2EA) of fan
motor up bracket and
remove it
Screw of fan rotor
Screw of Fan Motor
up bracket
2
Loosen the marked
screw (1EA) of fan
motor and remove fan
motor
ove it
Fan motor bracket(UP)
Fan motor assy
11
Domestic air conditioner
Removal Procedure
Step
3
Procedure
Points
Lift up the right part of
the fan and remove it
Remove horizontal louver and fan motor bracket
1
Every blade go round
and round, then move
it
12
Domestic air conditioner
Removal Procedure
Remove fan motor bracket and fan bearing
Step
Procedure
1
Pull the hook of fan
motor bracket and
upward remove it
2
Pull the hook of
bearing bracket and
upward remove it
13
Points
Domestic air conditioner
Removal Procedure
Remove frame work board
Step
1
Procedure
Points
Loosen the marked
screw of frame work
board
Screw of frame work
board
2
Pull the hook of frame
work board, remove it
14
Domestic air conditioner
Removal Procedure
Remove drain pipe and drain pipe stem
Step
Procedure
1
Loosen the marked
screw of drain pipe
and then remove it
2
Pull the drain pipe
stem from base frame
and the remove it
15
Points
Domestic air conditioner
Generalny Dystrybutor Systemów
Klimatyzacji i Pomp Ciepła HEIKO
REFSYSTEM Sp. z o. o.
ul. Metalowców 5
86-300 Grudziądz
+48 723 737 378
www.heiko.pl
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