Hitachi SAMURAI Series Service Manual page 112

4 Troubleshooting
Troubleshooting by alarm code
C1-t1
Alarm code
Alarm stop reason
Temperature of refrigerant suctioned into compressor (Ts) falls below -5ºC for more than 10 seconds. (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", "Ts Retry" is shown in "No.1 Cycle".
Retry code
C1-P6
PCB monitoring position
PCBd (I/O PCB) CN27 (Suction gas thermistor)
Compressor
suction gas refrigerant
temperature has actually
dropped to activation
value
No
The connection and
insertion of connector
CN27 on PCB (I/O PCB)
d
are correct
There are
problems with thermistor
characteristics
Check of PCB (I/O PCB)
d
104 SMGB0120 rev.0 - 11/2017
Suction gas decrease
Yes
No
Yes
Yes (There are problems)
No (There are no problems)
Adjustment of water quantity (adjustment
of inlet-outlet water temperature)
Clogging of water strainer
Adjustment of reverse rotation of pump
Adjustment of air mixture
Adjustment of cold water thermo settings.
Shall be within usage range
Correction of
connections
Replace thermistor