VESSER CGU12N, Service Instructions Manual, Page: 80 / 177

77
QSPEVDU
Cassette Type Indoor Unit’s Error Indicating:
LED No error
Flash times
every two
seconds
Error description
yellow: Timing
indicating lamp
It goes on as per the
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when the temperature
sensor error occurs
once the indoor ambient temperature sensor error
twice the evaporator temperature sensor error
three times the condenser temperature senor error
four times the outdoor ambient temperature senor error
¿YHWLPHV the discharge air temperature sensor error
green:Compressor
indicating lamp
It goes on/off as the
compressor is turned
RQRII$QGLWÀDVKHV
when defrosting or the
compressor error occurs
twice Defrosting
three times high pressure protection
four times the low pressure protection
¿YHWLPHV
Overload protection
six times Discharge high temperature protection
red:Running
indicating lamp
It goes on/off as the
unit is turned on/off,
$QGLWÀDVKHVZKHQWKH
indoor unit error occurs
twice
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three times the anti-freezing error
four times Anti-high temperature protection
2 FLOW CHART OF TROUBLESHOOTING
Service personnel shall collect the malfunction information as much as possible and research them
thoroughly, list these electrical parts which may cause malfunction, service personnel shall be able to
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z
Observe the status of the complete device and do not observe the partial
z ,WLVDGYLVHGWRVWDUWIURPWKHVLPSOHRSHUDWLRQGXULQJDQDO\]LQJMXGJLQJDQGFRQ¿UPLQJPDOIXQFWLRQUHDVRQ
WKHQFRQGXFWWKHFRPSOLFDWHGRSHUDWLRQVVXFKUHPRYDORIGHYLFHSDUWUHSODFHPHQWDQGUHIULJHUDQW¿OOLQJ
z Find the malfunction reason carefully as unit may occur several malfunction at the same time and one
malfunction may develop into several malfunction, so entire system analysis shall be established to make
the judged result exact and credible .