Hitachi YUTAKI Series - Page 215

213
Troubleshooting procedure
SMGB0066 rev.0 - 12/2009
Troubleshooting
Service Manual
7
 


– This alarm code is displayed when the contact between #1 and #2 of CN7 is not closed.

Are the connectors between
PCB1 and PCB2 correctly
connected?
PCB1
CN9-CN1
PCB2
CN5-CN2
CN7-CN3
CN2-CN4
No
Yes
Is the voltage between
VCC24N and GND2 on PCB1
24V?
(refer to voltage test position)
Yes
Replace PCB2
Is the connector CN7 on
PCB1correctlyconnected?
No
Yes
Wiringcheck,repair.
(Breakingofwire,wrongwiring)
Wiringcheck,Repair.
(Breakingofwire,wrongwiring)
Replace transformer
Yes
No
Check wiring and connector
Is the wiring of transformer
breaking?
Failure of power supply circuit
on PCB1
Yes
No
Is the voltage output of the
transformer secondary side
correctlyoutput?
No