Hitachi RCUE40AG2 Service Manual page 118

Troubleshooting

Alarm code

[Alarm Stop Reason]
1.- Discharge gas temperature from the
compressor is increased to 130°C and
continues for 1 minute.
2.- During the time counting in 1 minute,
temperature is increased over 140°C
during more than 3 seconds.
*In case of nº 2, alarm stop: 3 retries
during 90 minutes. (Compressor stop,
automatic restart in 3 minutes)
[Retry Code]
No. 1 Cycle: C1-P5
No. 2 Cycle: C2-P5
No. 3 Cycle: C3-P5
No. 4 Cycle: C4-P5
No. 5 Cycle: C5-P5
Is connector CN24Td on
the Printed Circuit Board
for Relay (PCB ) correctly
D
connected?
Yes
Pull out connector and
measure thermistor
resistance. Is resistance
correct?
Yes
Yes
Check Printed Circuit
Board for Relay
(PCB )
D
pag. 116
SMGB0003 rev.0 - 01/2007
Activation of Discharge Gas Thermistor (Td)
[PCB Monitoring Position]
No
No
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 correctly and
repair wiring
Replace thermistor
Shortage of refrigerant/ gas leakage
Check valve malfunction
Clogging of expansion valve
Expansion valve opening check
Expansion valve malfunction