Hitachi RCUE40AG2 Service Manual page 138

Troubleshooting

Alarm code
[Alarm Stop Reason]
Water fl ow protection switch is
activated
Is chilled water fl owing?
Yes
Is water shortage
protection switch ON
during pump running?
Yes
Is 220-240V the voltage
between connector PCN
10 PIN1 and connector
PCN 10 PIN3 on the
Printed Circuit Board for
CIU (PCBC)?
Yes
Check the Printed
Circuit Board for CPU
(PCBC)
Alarm code

[Alarm Stop Reason]
At remote setting by remote controller,
transmission is not performed for 3
minutes once it is started.
Is setting of Dip Switch
correct?
Yes
Check the setting of
CSC-5S side
pag. 136
Water fl ow Protection Switch Activation (at 63W use;
No
No
No
Abnormality (at CSC-5S connection:
No
SMGB0003 rev.0 - 01/2007
Option)
[PCB Monitoring Position]
PCB (CPU PCB) PCN10
C
System Controller Connection
[PCB Monitoring Position]
PCB (CPU PCB) CN11
C
Check the pump
Check water fl ow in the
pump
Clogging of water
strainer
Check the water
shortage protection
switch
Check wiring
Set Dip Switch correctly