Hitachi RCUE40AG2 Service Manual page 130

Troubleshooting
 
Alarm code

[Alarm Stop Reason]
Thermistor for discharge gas
temperature indicates abnormal
value.
Is Printed Circuit Board for
Relay (PCB ) connector
D
CN24Td correctly
connected?
Yes
Disconnect connector and
measure resistance. Is the
resistance correct?
Yes

Alarm code

[Alarm Stop Reason]
Thermistor for detection of air side
heat exchanger outlet (subcooled
liquid) temperature indicates
abnormal value.
Is Printed Circuit Board for
Relay (PCB ) connector
D
CN22Te1 correctly
connected?
Yes
Disconnect connector and
measure resistance. Is the
resistance correct?
Yes
pag. 128
Discharge Gas Temperature Thermistor Abnormality
No
No
Liquid Temperature Thermistor Abnormality
No
No
SMGB0003 rev.0 - 01/2007
[PCB Monitoring Position]
No. 1 Cycle: PCB (I/O PCB) CN24Td
D1
No. 2 Cycle: PCB (I/O PCB) CN24Td
D2
No. 3 Cycle: PCB (I/O PCB) CN24Td
D3
No. 4 Cycle: PCB (I/O PCB) CN24Td
D4
No. 5 Cycle: PCB (I/O PCB) CN24Td
D5
Plug, Wiring Repair
Replace Thermistor
Replace printed circuit
board for CPU (PCB
[PCB Monitoring Position]
No. 1 Cycle: PCB
D1
No. 2 Cycle: PCB
D2
No. 3 Cycle: PCB
D3
No. 4 Cycle: PCB
D4
No. 5 Cycle: PCB
D5
)
D
(I/O PCB) CN22Te1
(I/O PCB) CN22Te1
(I/O PCB) CN22Te1
(I/O PCB) CN22Te1
(I/O PCB) CN22Te1
Plug, Wiring Repair
Replace Thermistor
Replace printed circuit
board for Relay (PCB )
D