Hitachi RCUE40AG2 Service Manual page 129

Troubleshooting
Abnormal
Product Model
Code
RCUE 40 ~ 80 AG2

RHUE 40 ~ 80AG2


RCUE 80 ~ 400 AG2

RHUE 80 ~ 240 AG2



Alarm code

[Alarm Stop Reason]
Thermistor for inlet refrigerant
temperature at water side heat
exchanger indicates abnormal value.
Is Printed Circuit Board for
Relay (PCB ) connector
D
CN27correctly connected?
Yes
Disconnect connector and
measure resistance. Is the
resistance correct?
Yes
pag. 127
SMGB0003 rev.0 - 01/2007
Thermistor
Outlet water temperature Thermistor 1
Outlet water temperature Thermistor 1
Outlet water temperature Thermistor 1
Outlet water temperature Thermistor 1
Outlet water temperature Thermistor 1
Outlet water temperature Thermistor 1
Evaporating Temperature Thermistor Abnormality
[PCB Monitoring Position]
No
No
PCB
PCB
C1
PCB
C1
PCB
C1
PCB
C1
PCB
C2
PCB
C2
No. 1 Cycle: PCB (I/O PCB) CN27Tr2
D1
No. 2 Cycle: PCB (I/O PCB) CN27Tr2
D2
No. 3 Cycle: PCB (I/O PCB) CN27Tr2
D3
No. 4 Cycle: PCB (I/O PCB) CN27Tr2
D4
No. 5 Cycle: PCB (I/O PCB) CN27Tr2
D5
Plug, Wiring Repair
Replace Thermistor
Replace printed circuit
board for Relay (PCB
Connector
CN4
CN4
CN6
CN7
CN4
CN6
5 5
)
D