4 Troubleshooting
Troubleshooting by alarm code
SMGB0120 rev.0 - 11/2017
99
4
Alarm code
C1-L1
Low pressure interruption control
Alarm stop reason
Suction pressure (Ps) becomes lower than 0.14MPa for more than 90 seconds. (Electronic control, only enabled in
cooling)
?
N O T E
Causes alarm stop with 3 occurrences in 30 minutes. Retry control is performed until the second one. (Compressor stops, and restarts
automatically after 3 minutes)
Retry indication
LCD: By touching “Inspection”, “Ps Retry” is shown in “No.1 Cycle”.
Retry code
C1-P6
PCB monitoring position
PCBd (I/O PCB) CN32PS (Suction pressure sensor)
Open the stop valve
Lack of refrigerant. Gas leakage
Revision of
connections
Replacement of
pressure sensor
Clogging. Malfunction of
expansion valve
Clogging of low pressure side
pipes
Insufficient volume of water
Reverse rotation of pump
Air mixture
Clogging of strainer
Excessive humidity in refrigerant
Formation of lime deposit in water
side heat exchanger
Malfunction of check valve
Check of PCB
d
(I/O PCB)
The connection and
insertion of connector
CN32PS to PCB
d
(I/0 PCB)
are correct
No
The stop valve
liquid line is closed
No
No
Yes
Low pressure
has actually dropped to
activation value
There are
problems with the
characteristics of pressure
sensor
Yes
Yes
Yes
(There are no problems)
(There are problems)
No