Hitachi RCUE40AG2 Service Manual page 119

Troubleshooting

Alarm code

[Alarm Stop Reason]
The electrical motor of the compressor
is overheated and internal Thermostat is
activated.
*Alarm stop: 3 retries during 60 minutes.
(Automatic restart after compressor stop
and Thermostat recover)
[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 alarm activated just
after running?
No (Activate
after a while)
Is 220-240V the voltage
between connector
PCN204 PIN1 and
connector PCN 204 PIN3
on the Printed board for
Relay (PCB )?
D
Yes
Wiring Check
pag. 117
SMGB0003 rev.0 - 01/2007
Activation of Internal Thermostat for Compressor
Yes
No (Printed
Circuit Board is
normal)
[PCB Monitoring Position]
No. 1 Cycle: PCB (I/O PCB) PCN204
D1
No. 2 Cycle: PCB (I/O PCB) PCN204
D2
No. 3 Cycle: PCB (I/O PCB) PCN204
D3
No. 4 Cycle: PCB (I/O PCB) PCN204
D4
No. 5 Cycle: PCB (I/O PCB) PCN204
D5
Is 220-240V the voltage
between connector
PCN204 PIN1 and
connector PCN 204 PIN3
on the Printed Circuit
Board for Relay (PCB )?
D
No
Excessive or short power source voltage
Interphase of power source voltage is imbalanced.
Compressor motor is locked
Expansion valve opening check
Insulation of compressor motor is lowered
Yes
Check Printed Circuit
Board for Relay
(PCB
Wiring Check
(breaking of wire,
wrong wiring)
5 5
)
D