TM 5-6115-465-12
TO 35C2-3-446-1
NAVFAC P-8-625-12
TM 06858B/06859D-12
Table 3-2. Troubleshooting (Cont)
PROBABLE CAUSE
CORRECTIVE ACTION
MALFUNCTION
15. AC voltmeter
a. Defective VOLT-AMP transfer
a. Replace switch (para. 3-112).
switch.
does not in-
dicate voltage
b. Defective voltage adjust rheo-
b. Replace defective voltage adjust rheo-
stat (para. 3-112).
stat.
c. Defective ac voltmeter.
c. Replace ac voltmeter (para. 3-112).
16. AC voltmeter
a. Engine speed too slow.
a. Adjust frequency rheostat (Precise Sets
Only) (para. 2-10). Increase engine
indicates volt-
speed with manual speed control
age, but fre-
(Utility Sets Only) (para. 2-10).
quency meter
is off scale.
b. Defective frequency meter.
b. Replae frequency meter (para. 3-112).
C.
Replace frequency transducer (para.
c. Defective frequency trans-
ducer.
17. AC voltage
a. Loose electrical connection.
a. Inspect electrical system and make any
repairs necessary (figures FO-1 and
fluctuates.
b. Defective VOLT-AMPS selector
b. Replace VOLT-AMPS SELECTOR
switch.
switch (para. 3-112).
c. Defective voltage adjust rheo-
c. Replace voltage adjust rheostat (para.
stat.
d. Defective ac voltmeter.
d. Replace ac voltmeter (para. 3-112).
18. Frequency
a. Erratic engine operation.
a. Refer to malfunction 5 of this table.
fluctuates.
b. Defective frequency adjust
b. Replace frequency adjust rheostat
rheostat (Class 1 sets only).
c. Replace frequency meter (para. 3-112).
c. Defective frequency meter.
d. Defective frequency trans-
d. Replace frequency transducer (para.
ducer.
19. Main AC con-
a. Defective circuit breaker switch.
a. Inspect, test S3. Replace if defective
tactor (CB2)
b. Defective Main Load Contactor
will not close
c. Defective reverse power relay K15
b. Disconnect electrical connector (P&J41
Start generator set. While holding circuit
breaker switch (S3) in closed position, using
d. Defective undervoltage relay
K11 (Precise Sets Only).
a voltmeter, test for 28 VDC at J41, recep-
tacle A( + ) and test CB2 (para 3-121). Replace
if defective. If 28 VDC is not present, notify
e. Defective under-frequency re-
higher level maintenance.
lay K12 (Precise sets only).
f. Defective permissive parallel-
ing relay K16 (Precise sets only).
g. Defective contactor switch S3.
Change 17
3-23
