TM 5-6115-593-12
TO 35C2-3-463-1
Table 4-3. Organizational Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. GENERATOR AC PWR CKT BKR CLOSED LAMP GOES OUT (LOAD DISCONNECTS)-continued
Step 4
If UNDERVOLT indicator lamp is lit, toggle ANNUNCIATOR RESET switch to up position and observe
UNDERVOLT indicator lamp.
If lamp goes out, refer to next higher level of maintenance, as problem exists.
If lamp remains lit, check VOLT AC meter for each generator winding.
If normal undervoltage relay K111 (78, figure 4-20) or relay K33 (part of annunciator control
assembly, 76, figure 4-20) may be defective and must be referred to next higher level of
maintenance for testing.
If VOLTS AC meter reads low, refer voltage regulator VR1 (48, figure 4-17) to next higher level of
maintenance for testing.
Step 5
If REVERSE POWER indicator lamp is lit, toggle PARALLEL OPERATION switch to SINGLE UNIT
OPERATION; toggle ANNUNCIATOR RESET switch to up position; toggle AC PWR CKT BKR to CLOSE;
observe REVERSE POWER indicator lamp.
If lamp goes out, check that controls have been properly set for parallel operation.
If malfunction persists, refer malfunction to next higher level of maintenance.
If lamp remains lit, relay K34 (part of annunciator control relay assembly, 76, figure 4-20) or
reverse power sensing relay K112 (67, figure 4-20) may be defective and must be referred to next
higher maintenance for testing.
Step 6.
If SHORT CIRCUIT indicator lamp is lit, toggle ANNUNCIATOR RESET switch to up position and observe
SHORT CIRCUIT indicator lamp.
If lamp goes out, refer external load circuits to the next higher level of maintenance.
If lamp stays lit, relay K36 (annunciator control relay assembly, 76, figure 4-20) or short circuit
relay K113 (71, figure 4-20) may be defective and must be referred to next higher level of
maintenance for testing.
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