Hitachi SAMURAI Series Service Manual page 156

4. Troubleshooting
Troubleshooting by alarm code
In case of "fan overcurrent"
Restart operation
It trips immediately
No
(Rarely occurs)
The current check of fan
motor exceeds 10A.
Replace the fan module
Local power source voltage is
within usage range
Voltage during operation is higher
than rated 15%
Replace the fan module
N O T E
Use silicone grease sealant between the PCB and aluminium fin to insure properly heat transfer. Available as spare part
(P22760).
148
SMGB0082 rev.1 - 07/2015
U,V,W on the fan module,
Yes
and turn DSW1-1# of the fan
module ON (Up). In that state,
reactivate power and try to
No
operate. Does it trip (release
(It can be reproduced)
Yes
No
No
Check of the local power
Yes
No
Yes
Turn power source OFF,
remove faston terminals
zero A detection?
Yes
Abnormal
Replace the fan module
Check the surroundings of
fan module
•
Clogging of air side heat exchanger
•
Trapping of foreign bodies in the fan
•
Fan motor lock
•
Propeller fan contact
source system
Check the
fan module
Not normal
Check of the
wiring system