●
“RUN” light flashes and “ALARM” is indicated on the remote control switch.
●
The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and
the unit No. and alarm code are indicated on the display of the outdoor unit PCB1.
★
This alarm is indicated when the following conditions occurs;
•
The running current of the constant speed compressor exceeds the value of overcurrent limitation
during operating.
•
The running current of the constant speed compressor is detected 0A and retry when 3 minutes are
passed after all compressors are stopped, and this phenomenon occurs three times within 30 minutes.
Alarm
Code
Abnormality of Running Current at Constant Speed Compressor
Connect it correctly.
No
No
Yes
Yes
Yes
Yes
Does the CMC2
turn ON?
Does the constant speed
compressor operate?
Is the running
current indicated on
7-Segment of PCB1
at check mode?
Is the connector
CN80 of current
transformer CT2
correctly connected?
No
Check wiring connection
around PCB1.
No
Check fuses and wiring
between CMC2 and
constant speed compressor.
Check constant speed compressor
and current transformer.
Remove the cause after checking.
PCB1: Control PCB in Outdoor Unit
222
