Hitachi SAMURAI Series Service Manual page 115

4 Troubleshooting
Troubleshooting by alarm code
C1-21
Alarm code
Alarm stop reason
Thermistor for detection of inlet refrigerant temperature (Te) at the heat exchanger indicates an abnormal value.
PCB monitoring position
PCBd (I/O PCB) CN29 (Cooler inlet thermistor (Te))
?
N O T E
Refer thermistor characteristics chapter
measure thermistor resistance.
C1-23
Alarm code
Alarm stop reason
Thermistor for detection of discharge gas temperature (Td) indicates an abnormal value.
PCB monitoring position
PCBd (I/O PCB) CN26 (Discharge gas thermistor (Td))
?
N O T E
Refer thermistor characteristics chapter.
measure thermistor resistance.
107 SMGB0120 rev.0 - 11/2017
Cooler inlet THM abnormality (CN29)
The connection and
insertion of connector
CN29 on PCBd (I/O PCB)
are correct
Yes
Remove the
connectors and
Is resistance value
normal?
Yes
Discharge gas THM abnormality (CN26)
The connection and
insertion of connector
CN26 on PCBd (I/O PCB)
are correct
Yes
Remove the
connectors and
Is resistance value
normal?
Yes
No
Correction of
connections
No
Replace thermistor
Replace PCBC (I/O PCB)
No
Correction of connections
No
Replace thermistor
Replace PCBC (I/O PCB)
4