York YHKJXH012BAM--FX Service Manual page 123

YHUJYH024BAR-A-X YHUJYH028BAR-A-X YHUJYH036BAR-A-X YHUJYH048BAR-A-X
YHUJYH048BAS-A-X YHUJYH060BAS-A-X
Malfunction
Trouble Description
Code
EEPROM faulty
Over current protection in course of
compressor frequency going down
detected by software
protection of over current in course
of compressor fixed speed operation
Communication abnormal between
connecting board and module
Compressor overcurrent
Compressor blocked or abnormal
operation
Protection of discharging temp. too
high
DC fan motor faulty
Outdoor defrosting temp. sensor
abnormal
Suction temp.sensor abnormal
Ambient temp. sensor abnormal
Discharging temp. sensor abnormal After compressor running for 3 minutes, Sensor is detected below
communication between indoor
and outdoor abnormal
Lack of refrigerant or discharging
pipe blocked
4-way vavle converse abnormal
Over current in course of compr-
essor frequency going down
Over current protection in course
of compressor fixed speed opera-
tion detected by software
Module temp. too high or module
temp.sensor abnormal
Over current protection in course
of compressor frequency going up
down detected by software
Without connection to compressor
High voltage protection for
module
Low voltage protection for module
Communication abnormal among
modules
Mid-condenser temp. sensor
abnormal
Low pressure switch abnormal
High pressure switch abnormal
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 manul.
PRODUCT DIAGNOSIS PROCEDURE
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Module abnormal, if it occurs 3 times in 1 hour, confirm the failure
It can not get the feedback from module after communicating for 4
minutes
If it occurs 3 times in 1 hour, confirm the failure, the former
twice will not alarm
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
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
If it occurs 3 times in 1 hour, confirm the failure, the former
twice will not alarm
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.
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Sensor is detected below 20 or over 1000 for 60 seconds, but in
frosting or within 6 minutes after defrosting, it will not alarm
20 or over 1000 for 60 seconds
Indoor unit can not be inspected for 4 minutes continuously
If it occurs 3 times in 1 hour, confirm the failure.
If it occurs 3 times in 1 hour, confirm the failure.
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
From moudle board
From module board
It can not detect the input signal for 2 minutes
Sensor is detected below 20 or over 1000 for 60 seconds, but in
defrosting or within 6 minutes after defrosting, it will not alarm
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
After compressor running for 3 minutes, if switch is detected uncon-
nected 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
Analyze and diagnose
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Remark
Non-resumable
Non-resumable
resumable
Non-resumable
resumable
Non-resumable
Non-resumable
Non-resumable
Non-resumable
resumable
resumable
resumable
resumable
resumable
Non-resumable
Non-resumable
Non-resumable
Non-resumable
Non-resumable
Non-resumable
Non-resumable
resumable
resumable
Non-resumable
resumable
Non-resumable
Non-resumable