CHM551S
Power up machine
and begin a test
cycle. Are the AC
Drives Status
lights on?
Replace Inverter control Board.
NOTE: If problem persists,
replace front end control board.
Yes
For 5hp drives:
with 480V:
is there
three phase line
voltage on H1-4, H1-3
and H1-2?
For 2hp drives:
is there three phase line
voltage on H1-4, H1-3 and
H1-1 and single-phase line
voltage on H1-4 and H1-3?
For B-voltage only: is
there line voltage
on H1-1 and
H1-2?
Replace Inverter
control Board.
Yes
Replace or fix the
necessary harness.
Yes
No
Are there any loose
connections on the H-1
harness going to the
KM1 Contactor?
No
Check harness for loose wire
connections going back to the
machines main power supply.
No
Is there line
voltage on the
KM1 Drive Power
Contactor?
Yes
Continued on next page.
Continued from previous page.
No
C
B
D
F
E
For 3 and 5hp
drives (non-480V):
is there three phase
line voltage
on H1-4, H1-3 and H1-2
and single-phase
line voltage on
H1-2 and H1-3?
G
To Next Page
Loading...
