Hitachi YUTAKI Series - Page 208

Troubleshooting
Service Manual
206
Troubleshooting procedure
SMGB0066 rev.0 - 12/2009
 


• ThealarmcodeisdisplayedonthePCB´sdisplay.
• Thecompressorstopsandrestartsautomaticallyin3minutes.
• Thealarmappearsafter6retriesduring30minutes.
– This alarm code is displayed when the compressor current is higher than the set value.

Restart the
operation. Does it
tripimmediately?
Check ISPM
orDip-IPM?
Turnoffpower,
disconnectU,V,Wfrom
compressor terminals and
restart. Does the protecting
functionactivate?
Check compressor
Check power supply
and wiring capacity.
Check compressor
Replace ISPM or Dip-
IPM
Yes
No
No
No
Yes
No
Check ISPM
Yes
No
Check power supply.
Is the current value which
activating,morethan
settingvalue(70.5A)?
Is there any
factor which
instantaneous
voltage drop
happened?
Is the input current of
each phase almost same
inall3phase?
No
(Trip after while)
No
Yes
Check power supply
and wiring capacity
No
Yes
Replace ISPM or Dip-
IPM
Is the power supply
voltage higher than 170V
duringoperation?
Is the power supply
voltage higher than
170Vduringoperation,
even if the other
appliancestarts?
No
Yes
Is the power supply
voltage230V±10%?
Yes
(Trip
immediately)
No
(Trip happen
sometimes)

caution
Electrical hazard. Risk of electrical shock. Before checking and replacing the inverter parts perform the high -
voltage discharge procedure by referring to section "Checking procedure for main parts".