Airwell YUDA060, Service Manual

Page: 47 / 70

6. Diagnostic code and trouble shooting
6.1.1. Diagnostic code for outdoor unit
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PRODUCT DIAGNOSIS PROCEDURE
EEPROM faulty
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Over current protection in course of
compressor frequency going down
detected by software
Non-resumable
Non-resumable
resumable
Module abnormal, if it occurs 3 times in 1 hour, confirm the failure
protection of over current in course
of compressor fixed speed operation
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Module temp. too high or module
temp.sensor abnormal
Non-resumable
Non-resumable
Communication abnormal between
connecting board and module It can not get the feedback from module after communicating for 4
minutes
resumable
Compressor overcurrent
If it occurs 3 times in 1 hour, confirm the failure, the former
twice will not alarm
Non-resumable
Compressor blocked or abnormal
operation If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Non-resumable
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
Protection of discharging temp. too
high
Non-resumable
DC fan motor faulty
If it occurs 3 times in 1 hour, confirm the failure, the former
twice will not alarm
Non-resumable
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.
Outdoor defrosting temp. sensor
abnormal
resumable
Suction temp.sensor abnormal
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
resumable
Ambient temp. sensor abnormal
Sensor is detected below 20 or over 1000 for 60 seconds, but in
frosting or within 6 minutes after defrosting, it will not alarm
resumable
Discharging temp. sensor abnormal After compressor running for 3 minutes, Sensor is detected below
20 or over 1000 for 60 seconds
resumable
Indoor unit can not be inspected for 4 minutes continuously
resumable
communication between indoor
and outdoor abnormal
Lack of refrigerant or discharging
pipe blocked
If it occurs 3 times in 1 hour, confirm the failure.
Non-resumable
4-way vavle converse abnormal
If it occurs 3 times in 1 hour, confirm the failure.
Non-resumable
Over current in course of compr-
essor frequency going down
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Non-resumable
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Over current protection in course
of compressor fixed speed opera-
tion detected by software
Non-resumable
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Over current protection in course
of compressor frequency going up
down detected by software
Non-resumable
Non-resumable
If it occurs 3 times in 1 hour, confirm the failure, the former twice will
not alarm
Without connection to compressor
High voltage protection for
module
From moudle board
resumable
resumable
From module board Low voltage protection for module
Communication abnormal among
modules
It can not detect the input signal for 2 minutes
Non-resumable
resumable
Sensor is detected below 20 or over 1000 for 60 seconds, but in
defrosting or within 6 minutes after defrosting, it will not alarm
Mid-condenser temp. sensor
abnormal
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
Low pressure switch abnormal
High pressure switch abnormal
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
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 manul.
Non-resumable
Malfunction
Code
Trouble Description
Analyze and diagnose
Remark
YUDA060
47