Hitachi RCUE40AG2 Service Manual page 133

Troubleshooting

Alarm code

[Alarm Stop Reason]
Discharge pressure sensor of
compressor indicates abnormal value.
Is connector CN28Pd on
the printed circuit board
for relay (PCB ) correctly
D
connected?
Yes
Is DC24V between
connector CN28Pd PIN1
and PIN3 on the printed
circuit board for relay
(PCB )?
D
Yes
Is less than DC 0.1V
or more than DC 4.9V
between connector
CN28Pd PIN2 and
PIN3 on the printed
circuit board for relay
(PCBD) when discharge
gas pressuresensor is
connected?
Yes
Is discharge gas pressure
sensor connecting pipe
Yes Yes Yes
clogging? clogging?
Discharge pressure
sensor abnormality
pag. 131
Discharge Pressure Sensor Abnormality
No
No
No
Yes
SMGB0003 rev.0 - 01/2007
[PCB Monitoring Position]
No. 1 Cycle: PCB (I/O PCB) CN28Pd
D1
No. 2 Cycle: PCB (I/O PCB) CN28Pd
D2
No. 3 Cycle: PCB (I/O PCB) CN28Pd
D3
No. 4 Cycle: PCB (I/O PCB) CN28Pd
D4
No. 5 Cycle: PCB (I/O PCB) CN28Pd
D5
Replace printed circuit
board for Relay (PCB
Replace printed circuit
board for Relay (PCB
Removing the clogging
Connect correctly
)
D
)
D
in the pipe.
5 5