T a b l e
4 - 8 .
L o a d
B a n k
T r o u b l e s h o o t i n g
MALFUNCTION
1.
2.
3.
4.
5.
6.
Load bank does not
apply load to genera-
tor set.
Over temperature
reset switch does not
remain engaged in
ON position while in
manual load reject
mode.
Over temperature
reset switch does not
remain engaged in
ON position while in
automatic load reject
mode.
Load bank does not
disconnect from
generator set with
rated kilowatt meter
above 30 W while in
automatic load reject
mode.
Fan and motor ae-
sembly not operating
properly.
Indicator does not
illuminate when load
back is in operation.
PROBABLE CAUSE
a.
b
-
c.
a.
b.
c.
d
-
a.
b.
a.
b.
a.
b
-
c.
a.
b
-
c.
Refer to malfunction 2
and 3 below.
Defective load selector
switch.
Defective wiring harness.
Defective fan and motor
assembly.
Defective thermostat
switch.
Defective over tempera-
ture reset switch.
Defective wiring.
me as 2 above.
If rated kilowatt meter
within load limits of
30 W, defective load
reject relay.
Defective load reject
switch.
Defective wiring harness.
Defective fan end motor
assembly.
Defective diode bridge.
Defective wiring harness.
Defective lamp.
Defective light.
Defective wiring harness.
Corrective ACTION
a.
b
-
c.
a.
b
-
c.
d.
a.
b.
a.
b
-
a.
b
-
c.
a.
b
-
c.
Refer to malfunction 2 and 3 below,
Test and replace switch if defective. (Refer
to p a r a g r a p h 4 - 4 4 . )
Repsir or replace wiring harness. (Refer
to p a r a g r a p h 4 - 4 3 . )
Check fan and motor assembly for proper
operation as in 5 below.
Test switch and replace if defective. (Refer to
p a r a g r a p h
4 - 4 7 . )
Test switch and replace if defective, (Refer to
p a r a g r a p h
4 - 4 4 . )
Repair or replace wiring. (Refer to
p a r a g r a p h
4 - 4 3 . )
Same as 2 above.
Test relay and replace if defective (higher level
of maintenance required).
Test switch and replace if defective. (Refer to
p a r a g r a p h
4 - 4 4 . )
Repair or replace wiring harness. (Refer
to p a r a g r a p h 4 - 4 3 . )
Test assembly and refer to next higher
level of maintenance, if defective,
Test bridge and replace diode(s) if defective.
(Higher level of maintenance required. )
Repair or replace wiring harness. (Refer
to p a r a g r a p h 4 - 4 3 . )
Test lamp snd replace if defective. (Refer to
p a r a g r a p h
4 - 4 4 . )
Test light and replace if defective. (Refer to
p a r a g r a p h
4 - 4 4 . )
Repair or replace wiring harness. (Refer
to p a r a g r a p h 4 - 4 3 . )
4 - 3 7