1-25
TROUBLESHOOTING
Does CMC1 ON
when starting?
Is Y52C1 of
7-segments ON?
(when in check
mode "SC")
Does CMC1 turn
ON for more than
3 seconds?
Faulty PCB1
Yes
No
No
Normal PCB1
Yes
Is the voltage
between PCN3 #1
and faston terminal
"N" 220V or 240V
during Y52C1 ON?
Yes
Is the protective
device still operating?
(No continuity between
#1 and #3 of PCN2
<5 to 20HP>,
No continuity between
#1 and #3 of PCN2,
PCN6, PCN7 and
PCN8 <24 and 30HP>
Is PCN3 or PCN2
loosened?
(5 to 20HP)
Is PCN3, PCN2,
PCN16, PCN17
or PCN18
loosened?
(24 and 30HP)
Yes
Yes
Yes
Check activation of the following safety devices. Remove the cause after checking.
(1) High Pressure Switch
(PSH: 3.0MPa (30 kgf/cm
2
G) for FS3, FS5 and FX3 Series
3.3MPa (33 kgf/cm
2
G) for FSG, FSG1 and FXG Series)
No
Faulty PCB1
No Voltage
Faulty PCB1
Restart after connecting
PCN3 or PCN2 correctly.
(5 to 20HP)
Restart after connecting
PCN3, PCN2, PCN16,
PCN17 or PCN18
correctly. (24 and 30HP)
Check Wiring Connection
Except for PCB1
No (No Voltage)
No (No Looseness)
No
“RUN” light flickers 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 PCB.
This alarm is indicated when one of safety devices is activated during compressor running.
Alarm
Code
Activation of Safety Device in Outdoor Unit
Check Item
Connector Faston
for CMC1 Terminal
380-415V/50Hz
380V/60Hz
220V/60Hz PCN3 S1
N
Power Supply
PCN3
To Next Page
Loading...
