Hitachi YUTAKI Series - Page 212

Troubleshooting
Service Manual
210
Troubleshooting procedure
SMGB0066 rev.0 - 12/2009
 


• Thefanmotorisstoppedonce,andrestartedafter10seconds.
This alarm code is displayed when the revolution pulse output detected from the fan motor is 10rpm or less. If it
occursmorethan10timesin30minutes,thisalarmisindicated.
– This alarm code is displayed when the fan motor is stopped by an abnormal reason like fan motor lock.
Yes
This alarm is indicated due
to detected overcurrent by
the contrary wind. This is
normal.
Doesthemotorrun?
Remove the foreign matter.
Does the fan stop by the foreign
matter?
Check the connector connection
of CN14 and CN15 (on PCB1) and
CN201,CN202,PCN201,PCN203(on
PCB3,4).
Faulty
Restart operation
No
Alarm code is not indicated
Yes
No
Aretheconnectorsabnormal?
Connect it correctly.
Restart operation
Doesthemotorrun?
This is normal
Replace the fan motor
Restart operation
Doesthemotorrun?
Yes
Good
This is normal
Yes
No
Alarm code is not indicated
Replace the PCB1
No

note
Check to ensure that DC Fan motor is checked according to the -
section "Fault diagnosis of DC fan motor".
In the case that the fan motor does not run even the
PCB1isreplaced,replacefaninverterPCB(PCB4,5).