TP-6745 7/1040 Section 2 Troubleshooting
MPAC 1500 does not
transfer to utility or takes
excessive time to transfer.
Poor connection at P1 connector.
Identify and correct.
Trace leads back to contactor
sensing terminals. Repair or
replace damaged leads or
harness.
YES
Reprogram controller
to correct AC voltage.
and recalibrate
Utility
source available at
P1-4, P1-11, and
P1-12?
Is LED1 on the
power supply
board illuminated?
Is the Utility Source
Available LED on?
Wait for TDEN to time out.
(Verify that in--phase
monitor sequence is
complete, if enabled.)
Verify power
directly on circuit
board P1-4, P1-11,
and 1-12.
A
Go to point A
in
Figure 2-22.
Replace the power board.
YES
YES
NO
NO
YES
NO
NO
SB-697
Note: To prevent damage to the controller and the device, NEVER
remove or reapply devices while the controller is energized. Follow
the safety precautions during this troubleshooting procedure.
Figure 2-21 Transfer Troubleshooting, Part 1
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