CHM552S
For 480-Volt
machines, check
power at H6-1 and
H6-2. Is there
220VAC?
Check harness for loose wire
connections going back to the
machines main power supply.
No
Yes
Yes
Is there voltage
on the KM1 contactor
between A1 Blu/org
and A2 Gry/Wht
wire?
Replace contactor.
Replace drive.
No
Check to see if the drive is
blowing the fuse.
Yes
No
For 480-volt
machines, check F3
fuse on Output board.
Does the fuse have
continuity?
No
Is the drain
valve causing the F3
fuse to blow?
Yes
Check to make sure the
door interlock circuit is
working properly. Refer to
door lock troubleshooting.
Continued from previous page.
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