Hitachi YUTAKI Series - Page 169

167
Initial troubleshooting
SMGB0066 rev.0 - 12/2009
Troubleshooting
Service Manual
7
  


System controller cable disconnected Connect the cable
Replace the cable or repair the
cable
One(orseveral)phasefailure,orinvertedphaseorder("” alarm).
Only in three phase unit.
ChecktheconnectionofR,S
and T phase.
Reorder the phases
Failure of remote/local switch or remote/local switch set at “local” Check remote/local switch
Turn the switch to “remote” or
replace switch
Decientcontactatterminal
controller connectors
Insufcientconnectionorincorrect
connection of the Yutaki unit PCB
Check the connectors and
terminals
Removerust,dustorany
contaminants,checkthe
correct tightening of the
terminals
Insufcientconnection
or incorrect connection of the terminal
in remote controller
Failure of the system controller Refer to “Troubleshooting of system controller”
UndenedPCBfailure
Unconnected wires to PCB Check the connectors Correctly connect the wires
Failure of PCB
Check PCB through its self-
diagnostic mode
Replace PCB if it failed
Incorrect wiring connection
Take action according to the procedure that is displayed in
"TEST RUN"