Maintenance
HPR400XD Auto Gas – 806160 5-31
Power measurement
Note: Check lines in the following order:
U to V
U to W
V to W
Check each line to ground. If one
line is 10% greater, or more, than the
other 2, put that leg on U.
U
V W
Ground
DANGER
SHOCK HAZARD
There is line voltage at the contactor and the power distribution board (PCB2) when the line
disconnect switch is on. Use extreme care when measuring primary power in these areas. Voltages
present at the terminal block and contactors can cause injury or death.
Main power in
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