Hobart 9OC24S Operation Manual page 239

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OPERATION, MAINTENANCE I AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 538lA
IROUBLE ,SYMPTOM,
AND CONDITIONS PROBABLE CAUSE TEST, CHECK, AND/OR REMEDY
LOAD CONTACTOR OPERATIN G CIRCUIT (CON TIN UED)
2. (Continued) A. (Continued)
(2) Aircraft re jetting
power
A. (Con tin wed)
(2)Check aircraft onboard
electrical equipment and
controls .
B. "Blown" fuse (2FU) d38, B. Press the lens housing of fault
Fig. 1) in protective relay indicating lights. If lamps do
tray not glow, replace fuse (2FU).
C. Defective plug-interlock
C. Place test-bank switch (2s) (37,
relay (1PIR)
Fig. 1) in ON position. If load
contactor will now remain closed,
replace the plug-interlock relay
(1PIR) (l-l, Fig. 7, item 18)
or the complete protective relay
tray.
:./
D. Small ccntacts in load D. Connect a jumper lead between
contactor (1 LC) defective terminals 815 and 816, Fig. 3.
If load contactor will now remain
closed, replace the load con-
tactor (1LC) (l-1, Fig. 10,
item 6).
E. Defective fuse-interlock E. Open protective relay tray and
relay (FIR) or resistor connect a jumper across the re-
(4RE S) sistor (4RES) (l-11, Fig. 7, item
11). If the contactor will now
remain closed, replace the resistor
(4RES). If the contactor will not
remain closed, replace fuse-inter..
lock relay (FIR) (l-1, Fig. 7, item
2) or replace the protective relay
tray assembly.
3. Load contactor A. Fuse (7FU) "blown 'I.
A. Replace fuse (7FU).
opens during
power delivery.
B. Output cable has become B. Reconnect cable plug securely to
NO fault indi- disconnected at aircraft aircraft .
eating lights
on.
act 30/73
Trouble Shooting Chart (Sheet 13 of 19)
Figure 6
3-2
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