Hitachi RCUE40AG2 Service Manual page 134

Troubleshooting

Alarm code

[Alarm Stop Reason]
Suction pressure sensor of
compressor indicates abnormal
value..
Is connector CN29Ps on
the printed circuit board
for relay (PCB ) correctly
D
connected?
Yes
Is DC5V between
connector CN29Ps 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
CN29Ps PIN2 and PIN3
on the printed circuit board
for relay (PCBD) when
discharge gas pressure
sensor is connected?
Yes
Is discharge gas pressure
sensor connecting pipe
Yes Yes Yes
clogging? clogging?
Discharge pressure
sensor abnormality
pag. 132
SMGB0003 rev.0 - 01/2007
Suction Pressure Sensor Abnormality
[PCB Monitoring Position]
No
No
No
Yes
No. 1 Cycle: PCBD1 (I/O PCB) CN29Ps
No. 2 Cycle: PCBD2 (I/O PCB) CN29Ps
No. 3 Cycle: PCBD3 (I/O PCB) CN29Ps
No. 4 Cycle: PCBD4 (I/O PCB) CN29Ps
No. 5 Cycle: PCBD5 (I/O PCB) CN29Ps
Connect correctly
Replace printed circuit
board for Relay (PCB
Replace printed circuit
board for Relay (PCB
Removing the clogging
in the pipe.
)
D
)
D