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  TM 11-5820-765-34
2-4.
SYMPTOM
INDEX
Use index to quickly find procedures in troubleshooting chart.
Troubleshooting
Procedure
Page
Symptom
Number
POWER ON: VOLTMETER SHOWS
ZERO VOLTAGE; FAN MOTOR B1
DOESN'T START.
POWER ON: VOLTMETER SHOWS
LOW OR ZERO VOLTAGE; FAN
DOESN'T START OR RUNS SLOW;
CIRCUIT BREAKER MAY OR MAY
NOT TRIP.
POWER ON: VOLTMETER SHOWS
ZERO VOLTAGE; 27 VOLTS DC
AT OUTPUT CONNECTIONS.
POWER ON: VOLTMETER Ml
SHOWS OUTPUT VOLTAGE;
FAN MOTOR B1 DOESN'T START.
FAN MOTOR B1 OPERATES; VOLT-
METER Ml, AMMETER M2 REMAIN AT
ZERO.
VOLTMETER
Ml
INDICATES
LOW
VOLTAGE.
CIRCUIT BREAKER CB1 WON'T
REMAIN ON.
POWER SUPPLY OPERATES AT
EXCESSIVE HIGH VOLTAGE.
VOLTAGE
FLUCTUATES
DURING
OPERATION.
OUTPUT VOLTAGE DOESN'T CHANGE
WHEN DC VOLTAGE ADJUST
CONTROL IS RESET MANUALLY.
VOLTMETER Ml INDICATES POWER
SUPPLY WORKING AT VOLTAGE
BELOW OPERATING LIMITS.
AMMETER
M2
SHOWS
ABNORMAL
CURRENT
OR
NO
CURRENT
DURING
NORMAL OPERATION.
POWER SUPPLY HUMS LOUDLY
DURING OPERATION.
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