DIAGNOSTICS
Troubleshooting
30JUL07
8F2919
Page
305 of 326
POWER SUPPLY Problems
Description or Possible Cause
Action
System will not power up.
•
Check source AC power at the wall.
•
Check the CIRCUIT BREAKERS. If either CIRCUIT
BREAKER is open, reset. A cause might be a short in the
POWER MODULE.
•
Check POWER SUPPLY outputs: +24 V DC and +5 V DC.
•
Disconnect the POWER CORD from the wall and use a
METER to check the operation of the POWER SWITCH.
System power is ON, then
OFF.
Press the POWER SWITCH on and hold it in. If power remains
on, but de-energizes with the SWITCH released, check the
following:
•
+24 V DC POWER SUPPLY
•
CONTACTOR RELAY K1 in POWER SUPPLY
•
CABLE connection