Mitsubishi Electric PUHY-HP72 Service Handbook page 244

[8-10 Control Circuit ]
Check for conductivity between TB11 and TB21 and
between TB12 and TB22.
Check the wiring between the noise filter board and
TB1 of power supply terminal block for proper
connections.
Check the voltage across L1 and L2 of power supply
terminal block TB1.
HWE18240_GB
A
NO
Is there conductivity between them?
YES
YES
Any problems with wiring or
loose connectors?
NO
YES
414-506 VAC
NO
Check TB11, TB12, TB21, TB22 on the noise
filter for loose screws.
NO
Any loose
Replace the noise filter
screws?
YES
Tighten loose screws.
Correct wiring problems, and tighten loose connectors.
Replace the power-supply board.
Check the power-supply wiring and the main
power supply, and correct any problems found.
B
Turn the power
supply back on.
47
chapter 8 -