Table 4-2. Troubleshooting - continued
TEST OR INSPECTION
ALL CEILING LIGHTS FAIL TO OPERATE - continued.
Step 1. Remove cover plate to switch S3 and using multimeter check switch for continuity.
If no continuity is found replace switch. Refer to paragraph 4-21.
Step 2. Check and reset circuit breaker CB17.
If power still not available, replace circuit breaker CB17. See paragraph 4-20.
DOOR BLACKOUT (MICRO) SWITCH DOES NOT OPERATE PROPERLY.
(WHITE LIGHTS DO NOT GO OUT WHEN DOOR IS OPENED, BLACKOUT
OVERRIDE IS IN OFF POSITION.)
Check switch electrical connections.
If switch still fails to operate properly, replace the blackout interlock switch.
CONVENIENCE OUTLET (RECEPTACLE) INOPERATIVE.
Step 1. Check that power is available to outlet.
If power is available, replace outlet. See paragraph 4-23.
If power is not available, proceed to step 2.
Step 2. Check and reset appropriate circuit breaker.
If power is still not available, replace circuit breaker. See paragraph 4-20.
PURGE DAMPER (INTAKE, OR ECU INTAKE) FAILS TO OPERATE.
Before performing any maintenance actions on electrical equipment,
ensure all electrical power has been turned off. Failure to comply with
this warning may result in serious injury or death.
Step 1. Check that damper operating linkage is not loose or broken.
Step 2. Remove cover to explosion proof distribution box and check that electrical power is
available to damper motor.
If linkage is connected and power available to motor, replace motor. See
paragraphs 4-16 or 4-17.