York Error Code

INDOOR UNIT
YHKJXH012BAM--FX 
YHKJXH018BAM--FX
YHKJXH024BAR--FX 
YHKJXH028BAR--FX
YHKJXH036BAR--FX 
YHKJXH048BAR--FX
YHKJXH048BAR--FX 
YHKJXH060BAR--FX
YHFJXH012BAM--FX 
YHFJXH018BAM--FX
YHFJXH024BAR--FX 
YHFJXH028BAR--FX
YHFJXH036BAR--FX 
YHFJXH048BAR--FX
YHFJXH048BAR--FX 
YHFJXH060BAR--FX
YHDJXH012BAM--GX 
YHDJXH018BAM--GX
YHDJXH024BAR--GX 
YHEJXH024BAR--GX
YHEJXH028BAR--GX 
YHEJXH036BAR--GX
YHEJXH048BAR--GX 
YHEJXH048BAR--GX
YHGJXH048BAR--GX 
YHGJXH048BAR--GX
YHGJXH060BAR--GX

OUTDOOR UNIT
YHUJYH024BAR-A-X
YHUJYH028BAR-A-X
YHUJYH036BAR-A-X
YHUJYH048BAR-A-X
YHUJYH048BAS-A-X
YHUJYH060BAS-A-X

Diagnostic code for outdoor unit YHUJYH024BAR-A-X

Flash times of LED on mainboard = 1
Trouble description = Eeprom failure
Analyze and diagnose = Outdoor main board eeprom fail

Flash times of LED on mainboard = 2
Trouble description = IPM failure
Analyze and diagnose = IPM failure

Flash times of LED on mainboard = 4
Trouble description = Communication error between main board and spdu module SPDU Communicition error
Analyze and diagnose = Communication fail over 4 min

Flash times of LED on mainboard = 5
Trouble description = High pressure protection
Analyze and diagnose = System high pressure over 4.15 Mpa

Flash times of LED on mainboard = 6
Trouble description = Module over-voltage protection(only for Spdu) Module lack-voltage protection(only for Spdu)
Analyze and diagnose = Send from Spdu module

Flash times of LED on mainboard = 8
Trouble description = Compressor discharging temperature protection
Analyze and diagnose = Compressor discharging temperature over 110 centigrade

Flash times of LED on mainboard = 9
Trouble description = Abnomal of DC motor
Analyze and diagnose = jam of DC motor or motor failure

Flash times of LED on mainboard = 10
Trouble description = Abnomal of pipe sensor
Analyze and diagnose = Piping sensor short-circuit or open-circuit

Flash times of LED on mainboard = 12
Trouble description = Abnomal of outdoor ambient sensor
Analyze and diagnose = Outdoor ambient sensor short-circuit or open-circuit

Flash times of LED on mainboard = 13
Trouble description = Abnormal of compressor dischage sensor
Analyze and diagnose = Compressor discharging sensor short-circuit or open-circuit

Flash times of LED on mainboard = 15
Trouble description = Communication error between indoor and outdoor unit
Analyze and diagnose = Communication fail over 4 min

Flash times of LED on mainboard = 16
Trouble description = Lack of refrigerant
Analyze and diagnose = check if there is leakage in the unit

Flash times of LED on mainboard = 17
Trouble description = 4-way valve reverse failure
Analyze and diagnose = Alarm and stop if detect Td-Tci<=15 last for 1min after compressor has started for 10min in heating mode, confirm the failure if it appears 3 times in one hour

Flash times of LED on mainboard = 18
Trouble description = Compressor jam (ony for spdu )
Analyze and diagnose = Inner compressor is abnormal jamed

Flash times of LED on mainboard = 19
Trouble description = Module EEV select circuit error
Analyze and diagnose = Module EEV select wrong circuit

Flash times of LED on mainboard = 25
Trouble description = Compressor U-phase over-current
Analyze and diagnose = The current of compressor U-phase is too high

Flash times of LED on mainboard = 25
Trouble description = Compressor V-phase over-current
Analyze and diagnose = The current of compressor V-phase is too high

Flash times of LED on mainboard = 25
Trouble description = Compressor W-phase over-current
Analyze and diagnose = The current of compressor W-phase is too high

Flash times of LED on mainboard = 45
Trouble description = Low pressure protection
Analyze and diagnose = System over pressure under 0.05Mpa

YHUJYH024BAR-A-X YHUJYH028BAR-A-X YHUJYH036BAR-A-X YHUJYH048BAR-A-X
YHUJYH048BAS-A-X YHUJYH060BAS-A-X
PRODUCT DIAGNOSIS PROCEDURE

Malfunction Code = 1
Trouble Description = EEPROM faulty
Analyze and diagnose =
Remark = Non-resumable

Malfunction Code = 2
Trouble Description = Over current protection in course of compressor frequency going down detected by software
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable resumable

Malfunction Code = 3
Trouble Description = protection of over current in course of compressor fixed speed operation
Analyze and diagnose = Module abnormal, if it occurs 3 times in 1 hour, confirm the failure
Remark = Non-resumable

Malfunction Code = 4
Trouble Description = Communication abnormal between connecting board and module
Analyze and diagnose = It can not get the feedback from module after communicating for 4 minutes
Remark = resumable

Malfunction Code = 5
Trouble Description = Compressor overcurrent
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable

Malfunction Code = 7
Trouble Description = Compressor blocked or abnormal operation
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable

Malfunction Code = 8
Trouble Description = Protection of discharging temp. too high
Analyze and diagnose = After compressor starts up, if TD is over 115 , 10 seconds later compressor stops, if it occurs 3 times in 1 hour, confirm the failure
Remark = Non-resumable

Malfunction Code = 9
Trouble Description = DC fan motor faulty
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former
twice will not alarm
Remark = Non-resumable

Malfunction Code = 10
Trouble Description = Outdoor defrosting temp. sensor abnormal
Analyze and diagnose = Sensor is detected below 20 or over 1000 for 60 seconds, but in cooling mode,this sensor failure will not be dealt with,and in defrosting or within 6 minutes after defrosting,it will not alarm
Remark = resumable

Malfunction Code = 11
Trouble Description = Suction temp.sensor abnormal
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = resumable

Malfunction Code = 12
Trouble Description = Ambient temp. sensor abnormal
Analyze and diagnose = Sensor is detected below 20 or over 1000 for 60 seconds, but in frosting or within 6 minutes after defrosting, it will not alarm
Remark = resumable

Malfunction Code = 13
Trouble Description = Discharging temp. sensor abnormal
Analyze and diagnose = After compressor running for 3 minutes, Sensor is detected below
20 or over 1000 for 60 seconds
Remark = resumable

Malfunction Code = 15
Trouble Description = communication between indoor and outdoor abnormal
Analyze and diagnose = Indoor unit can not be inspected for 4 minutes continuously
Remark = resumable

Malfunction Code = 16
Trouble Description = Lack of refrigerant or discharging pipe blocked
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure
Remark = Non-resumable

Malfunction Code = 17
Trouble Description = 4-way vavle converse abnormal
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure.
Remark = Non-resumable

Malfunction Code = 18
Trouble Description = Over current in course of compressor frequency going down
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable

Malfunction Code = 19
Trouble Description = Over current protection in course of compressor fixed speed operation detected by software
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable

Malfunction Code = 23
Trouble Description = Module temp. too high or module temp.sensor abnormal
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable

Malfunction Code = 24
Trouble Description = Over current protection in course of compressor frequency going up
down detected by software
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable

Malfunction Code = 27
Trouble Description = Without connection to compressor
Analyze and diagnose = If it occurs 3 times in 1 hour, confirm the failure, the former twice will not alarm
Remark = Non-resumable

Malfunction Code = 28
Trouble Description = High voltage protection for module
Analyze and diagnose = From moudle board
Remark = resumable

Malfunction Code = 29
Trouble Description = Low voltage protection for module
Analyze and diagnose = From module board
Remark = resumable

Malfunction Code = 38
Trouble Description = Communication abnormal among modules
Analyze and diagnose = It can not detect the input signal for 2 minutes
Remark = Non-resumable

Malfunction Code = 39
Trouble Description = Mid-condenser temp. sensor abnormal
Analyze and diagnose = Sensor is detected below 20 or over 1000 for 60 seconds, but in
defrosting or within 6 minutes after defrosting, it will not alarm
Remark = resumable

Malfunction Code = 43
Trouble Description = Low pressure switch abnormal
Analyze and diagnose = After compressor running for 3 minutes, if switch is detected
unconnected for 30seconds, it alarms, if it occurs 3 times in 1 hour, confirm this failure, if it occurs 3 times in 1 hour, confirm the failure, but in defrosting or within 6 minutes after defrosting, it will not alarm
Remark = Non-resumable

Malfunction Code = 44
Trouble Description = High pressure switch abnormal
Analyze and diagnose = After compressor running for 3 minutes, if switch is detected unconnected for 30seconds, it alarms, if it occurs 3 times in 1 hour, confirm this failure, or if Tcm is over 68 degree for 10 seconds for 3 times
Remark = Non-resumable

Note: The flash times of outdoor mainboard(ECU) LED1 indicates the malfuction code. for example, LED1 flash 3 times, the malfuction code is 3.
The flash times or malfuction code of indoor unit can also indictes the malfuction code too.the method to confirm please refer to indoor unit manual

 Diagnostic code for indoor unit
Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 1
Failure code(from wired controller) = 01
Failure code(from panel controller) = E1
Trouble shooting = Temperature sensor Ta faulty
Possible reasons = Sensor disconected，or broken，or at wrong position, or short circuit

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 2
Failure code(from wired controller) = 02
Failure code(from panel controller) = E2
Trouble shooting = Temperature sensor Te faulty
Possible reasons = Sensor disconected，or broken，or at wrong position，or short circuit

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 4
Failure code(from wired controller) = 04
Failure code(from panel controller) =F8
Trouble shooting = EEPROM WRONG
Possible reasons = Faulty indoor unit PCB

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 7
Failure code(from wired controller) = 07
Failure code(from panel controller) = E9
Trouble shooting = Abnormalcommunication between indoor and outdoor units
Possible reasons = Wrong connection，or the wires be disconected，or wrong address setting of indoor unit，or faulty power supply or faulty PCB

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 8
Failure code(from wired controller) = NO EEROR CODE DISPLAY
Failure code(from panel controller) = E8
Trouble shooting = Abnormal communication between indoor wired controller   and indoor
Possible reasons = Abnormal communication between indoor wired controller and indoor unit PCB

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 12
Failure code(from wired controller) = 0C
Failure code(from panel controller) = E0
Trouble shooting = Drainage system abnormal
Possible reasons = Pump motor disconnected，or atwrong position，or the  float switch broken down，or the float switch disconected，or at wrong position.

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 13
Failure code(from wired controller) = 0D
Failure code(from panel controller) = EF
Trouble shooting = Zero cross sigal wrong
Possible reasons = Zero cross sigal detected wrong

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 14
Failure code(from wired controller) = 0E
Failure code(from panel controller) = /
Trouble shooting = Indoor unit DC fan motor abnormal
Possible reasons = DC fan motor disconnected,or DC fan motor broken,or circuit broken

Flash times of Timing LED (or indoor PCB LED4）= 0
Flash times of Timing LED (or indoor PCB LED3）= 16
Failure code(from wired controller) = 10
Failure code(from panel controller) = F3
Trouble shooting =  Indoor mode abnormal
Possible reasons =  Different from outdoor unit mode

Flash times of Timing LED (or indoor PCB LED4）= 2
Flash times of Timing LED (or indoor PCB LED3）= 1
Failure code(from wired controller) = 15
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 2
Flash times of Timing LED (or indoor PCB LED3）= 2
Failure code(from wired controller) = 16
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 2
Flash times of Timing LED (or indoor PCB LED3）= 4
Failure code(from wired controller) = 18
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 2
Flash times of Timing LED (or indoor PCB LED3）= 5
Failure code(from wired controller) = 19
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 2
Flash times of Timing LED (or indoor PCB LED3）= 7
Failure code(from wired controller) = 1B
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 2
Flash times of Timing LED (or indoor PCB LED3）= 8
Failure code(from wired controller) = 1C
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 2
Flash times of Timing LED (or indoor PCB LED3）= 9
Failure code(from wired controller) = 1D
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 0
Failure code(from wired controller) = 1F
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 1
Failure code(from wired controller) = 1F
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 2
Failure code(from wired controller) = 20
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 3
Failure code(from wired controller) = 21
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 5
Failure code(from wired controller) = 23
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 6
Failure code(from wired controller) = 24
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 7
Failure code(from wired controller) = 25
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 8
Failure code(from wired controller) = 26
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 3
Flash times of Timing LED (or indoor PCB LED3）= 9
Failure code(from wired controller) = 27
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 4
Flash times of Timing LED (or indoor PCB LED3）= 3
Failure code(from wired controller) = 2B
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 4
Flash times of Timing LED (or indoor PCB LED3）= 4
Failure code(from wired controller) = 2C
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons =

Flash times of Timing LED (or indoor PCB LED4）= 4
Flash times of Timing LED (or indoor PCB LED3）= 7
Failure code(from wired controller) = 2F
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 4
Flash times of Timing LED (or indoor PCB LED3）= 8
Failure code(from wired controller) = 30
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 4
Flash times of Timing LED (or indoor PCB LED3）= 9
Failure code(from wired controller) = 31
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list


Flash times of Timing LED (or indoor PCB LED4）= 5
Flash times of Timing LED (or indoor PCB LED3）= 8
Failure code(from wired controller) = 3A
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 5
Flash times of Timing LED (or indoor PCB LED3）= 9
Failure code(from wired controller) = 3B
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 6
Flash times of Timing LED (or indoor PCB LED3）= 3
Failure code(from wired controller) = 3F
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list

Flash times of Timing LED (or indoor PCB LED4）= 6
Flash times of Timing LED (or indoor PCB LED3）= 4
Failure code(from wired controller) = 40
Failure code(from panel controller) = /
Trouble shooting = Outdoor unit abnormal
Possible reasons = Refer to the outdoor unit troubleshooting list


1. For the indoor failure ，only running LED ON remote receiver will indicate.
2. For the outdoor failure ，timer LED and running LED will indicate.timer LED of remote receiver stands for ten's place,and running LED
stands for one's place.timer LED will flash firstly,2 seconds later,running LED will flash too. Afer that,4 seconds later,they will flash in
turns again.Flash times equals to the failure code of outdoor plus
20.For example,failure code of outdoor is 2,the indoor unit should display 22.As a result,timer LED flashes twice firstly,then running LED
flashes twice.
3.To get much more details of outdoor unit failure,Please refer to the the outdoor unit trouble shooting list



York Minisplits


Temperature Sensor Resistance Readings

Temperature = 0C
K Ohms = 35K

Temperature = 10C
K Ohms = 20K

Temperature = 20C
K Ohms = 13K

Temperature = 30C
K Ohms = 8K

Fault Codes for RAHC, YKHC & YUHC Models

Indoor lights

Operation = Flash
Timer = Flash
Defrost = Flash
Faults = Outdoor Problem

Operation =
Timer =
Defrost = Flash
Faults = ID Air Sensor Fail

Operation = Flash
Timer =
Defrost =
Faults = ID Pipe Sensor Fail

Operation =
Timer =
Defrost = Flash
Faults = OD Pipe Sensor Fail

Operation = Flash
Timer = Flash
Defrost =
Faults = PCB Fail

Outdoor LEDS 3ph models only

LED 1 = Flash
LED 2 = Off
LED 3 = Off
Faults = Phase Error

LED 1 = Flash
LED 2 = Flash
LED 3 = Off
Faults = Pressure Switch

LED 1 = Off
LED 2 = Off
LED 3 = Flash
Faults = Overcurrent

LED 1 = Off
LED 2 = Flash
LED 3 = Flash
Faults = OD Pipe Sensor

LED 1 = Off
LED 2 = Flash
LED 3 = Off
Faults = OD Air Sensor

LED 1 = Flash
LED 2 = Flash
LED 3 = Flash
Faults = Hi Temp Protection

HVHC Inverter Fault Codes

Indoor Display = E0
ID PCB Fail
Outdoor LCDs
1 = On
2 Red = Off
3 Green = Off
4 Yellow = Off
Connected to Power


Indoor Display = E1
Comms Fail
Outdoor LCDs
1 = Off
2 Red = Off
3 Green = Off
4 Yellow = Off
Power or OD PCB Fail

Indoor Display = E3
Power Abnormal
Outdoor LCDs
1 = On
2 Red = On
3 Green = Off
4 Yellow = Off
Comms Fail

Indoor Display = E4
OD Sensor Fail
Outdoor LCDs
1 = On
2 Red = Off
3 Green = Off
4 Yellow = On
Compressor Overcurrent

Indoor Display = E5
ID Sensor Fail
Outdoor LCDs
1 = On
2 Red = Off
3 Green = Flash
4 Yellow = Flash
OD Air Sensor Fail E5
Indoor Display = E6
Inverter Module
Outdoor LCDs
1 = On
2 Red = Flash
3 Green = Off
4 Yellow = Flash
OD Pipe Sensor Fail E5

Indoor Display = PO
IPM Protection
Outdoor LCDs
1 = On
2 Red = On
3 Green = Flash
4 Yellow = On
OD Power Supply P1

Indoor Display = P1
OD Power Supply
Outdoor LCDs
1 = On
2 Red = Off
3 Green = On
4 Yellow = Off
IPM Protection P0

Indoor Display = P2
Compressor Hi Temp
Outdoor LCDs
1 = On
2 Red = Off
3 Green = On
4 Yellow = On
Compressor Temp P2

Indoor Display = P3
Outdoor Low Temp
Outdoor LCDs
1 = On
2 Red = On
3 Green = Off
4 Yellow = Off
Comms E1

Indoor Display = P4
Inverter/Compressor Fail
Outdoor LCDs
1 = On
2 Red = On
3 Green = Flash
4 Yellow = Flash
Inv / Comp Fail P4

Model SM-YJCC-YJHC


Items to be checked first
1. Is the voltage of the power correct? The input voltage shall be rating voltage 10%. The air conditioner may not operate properly if the voltage is out of this range.
2. Is the link cable connecting the indoor unit and the outdoor unit linked properly? Please refer to the “wiring diagram” Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.
3. When a problem occurs due to the contents illustrated in the table below, it is symptom not related to themalfunction of the air conditioner.


Operation of air conditioner = In COOL operation mode, the compressor does not operate at a room temperature higher than the setting temperature that the indoor fan should operate.In a HEAT operation mode, the compressor does not operate at a room temperature lower than the setting temperature that indoor fan should operate.

Explanation = It happens after a delay of 3 minutes when the compressor is reoperated. The same phenomenon occurs when a power is on.As a phenomenon that the compressor is reoperated after adelay of 3 minutes, the indoor fan is adjusted automatically withreference to a temperature of the air blow.


Operation of air conditioner = Fan speed setting is not allowed in AUTO or DRY mode

Explanation = The speed of the indoor fan is set to low in DRY mode.Fan speed of 3 steps is selected automatically in AUTO mode.


Operation of air conditioner = Compressor stops operation intermittently in DRY mode.

Explanation = Compressor operation is automatically controlled in DRY modedepending on the room temperature and humidity.


Operation of air conditioner = Compressor of the outdoor unit is operating although it is turned off in HEAT mode.

Explanation = When the unit is turned off while de-ice is activated, thecompressor continues operation for up to 10 minutes(maximum)until the deice is completed.


Operation of air conditioner = Timer indicator lamp lights up and the air conditioner doesnot operate.

Explanation = Timer is being activated and the unit is in ready mode.The unit operates normally if the timer operation is cancelled


Operation of air conditioner = The compressor and indoor fan stop intermittently in HEATmode.

Explanation = The compressor and indoor fan stop intermittently if room temperature exceeds a setting temperature in order to protectthe compressor from overheated air in HEAT mode


Operation of air conditioner = Indoor fan and outdoor fan stop intermittently in HEAT mode.

Explanation = The compressor operates in a reverse cycle to remove exteriorice in HEAT mode, and indoor fan and outdoor fan do not operate intermittently for within 20% of the total heat operation


Operation of air conditioner = The compressor stops intermittently in COOL mode or DRYmode, and fan speed of the indoor unit decreases

Explanation = The compressor stops intermittently or the fan speed of the indoor unit decreases to prevent inside/outside air frozendepending on the inside/outside air temperature.



SELF DIAGNOSIS FUNCTION
Our company provides the end-users with thoughtful services by installing various diagnostic systems to indicate the following irregular performances

Checkcode = FAULT F6
Diagnosis of malfunction = PG motor faults

Checkcode = FAULT F7
Diagnosis of malfunction = Indoor TEMP sensor faults

Checkcode = FAULT F8
Diagnosisofmalfunction = Indoor coil pipe TEMP sensor faults

Checkcode = FAULT F9
Diagnosisofmalfunction = Outdoor coil pipe TEMP sensor faults
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