Hobart Brothers 6910, Operation And Maintenance Manual With Illustrated Parts List

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Trouble Shooting Chart (Sheet 15 of 20)
Figure 5
TROUBLE, SYMPTOM TEST, CHECK, AND/OR
AND CONDITION PROBABLE CAUSE REMEDY
GENERATOR CONTROLS AND INSTRUMENTS (CONTINUED)
2. Load contactor will E. Defective fuse- E. Open protective relay tray
close when control interlock relay (K17) and connect a jumper across
switch (20, Fig. 1) or resistor (R46) the resistor R46) (Sect.
is held in momentary 1-1; 21, Fig. 8). If the
ON position. contactor will now remain
Opens immediately closed, replace the resistor
when switch is released (R46). If the contactor will
to center ON position. not remain closed, replace
fuse-interlock relay (K17)
(Sect. 1-1; 2, Fig. 8) or
replace the protective relay
tray assembly.
3. Load contactor A. Fuse (1F or 2F) blown A. Remove and inspect fuses
opens during power (1-1; 16 and 17, Fig. 8).
delivery. NO fault Replace as required.
indicating lights
on.
B. A fault has developed B. If the load contactor cannot
in the load be closed by operation of
contactor holding the control switch (S5) (20,
circuit. Fig. 1), check the circuit
in accordance with instruc-
tions in Trouble 1, above
under LOAD CONTACTOR
OPERATING CIRCUIT. If the
load contactor can be closed, but
opens as soon as control
switch (S5) is released,
check for trouble under
Trouble 2, above.
C. Cable accidentally C. Reconnect cable.
disconnected from
OM-2028
June 20/89 Revised 3-1
Page 23