Hitachi YUTAKI Series - Page 213

211
Troubleshooting procedure
SMGB0066 rev.0 - 12/2009
Troubleshooting
Service Manual
7
 


• ThealarmcodeisdisplayedonthePCB´sdisplay.
• Itisavailableoncefeedbacksignalconrmed.
– This alarm code is displayed when the Pump operation feedback signal (terminals 1-2) is OFF during pump interlock
(CMp) ON (terminals 3-4).

Is thermal relay for pump
(TRP)activated?.(Ifuseda
eldsuppliedpump)
Yes
No
Is 220-240V the voltage
between connector PCN4
PIN1andPIN3onPCB1?
No
Yes
Check Printed Circuit Board
(PCB1)
Check the Pump Lock
Check thermal relay for pump
Check wiring around pump
and thermal relay for pump