Hitachi SAMURAI Series Service Manual page 120

4 Troubleshooting
Troubleshooting by alarm code
C1-39
Alarm code
Alarm stop reason
Current sensor indicates an abnormal value (CT).
PCB monitoring position
PCBd (I/O PCB) CN36 (Current sensor (CT))
The connection and insertion of connector
CN36 on PCBd (I/O PCB) is correct
The connection and insertion of the
connector of current sensor on the body of the
The power wiring of compressor passes
through the current sensor
There are no changes to the characteristics
of the current sensor (The characteristics of the
current sensor differ in standard specification and
special voltage specification)
C1-03
Alarm code
Alarm stop reason
Transmission is not performed correctly inside I/O PCB (PCBd).
PCB monitoring position
PCBd (I/O PCB) Main microcomputer ~ Sub microcomputer
Check the setting
of the end terminal
resistances.The connection
between PCN238 on PCBc
and CN55 on PCBd, as well as
between PCN240 on PCBc
and CN57 on PCBd are
112 SMGB0120 rev.0 - 11/2017
Current sensor abnormality (CN36)
Yes
unit are correct
Yes
Yes
Yes
I/O internal transmission
No
correct.
Yes
No
Revision of connections
No
Revision of connections
No
Check of current sensor
No
specifications. Check of
Replacement of current
Revision of connections
Replace PCBd (I/O PCB)
Revision of wiring
DIP switches
sensor