CONTROL TROUBLESHOOTING
Use the following troubleshooting guide to help lo-
cate problems related to the control circuits. Fig-
ures
7-1
and 7-5 show the location of most of the
control components. Refer to the appropriate wir-
ing diagram/schematic in Section
8 for the location
of
all terminal connections.
The troubleshooting guide is divided into sections.
After identifying the problem, refer to the guide for
the possible cause and the recommended correc-
tive action.
Many
of
the components listed In the following pro-
cedures are
not
present on the newer, electronic
governor Marquis gensets. Follow
only
the proce-
dures that apply
to
the particular genset being serv-
Iced.
IAWARNINGI Many troubleshooting procedures
present
hazards which can result
in
se-
vere
persona/Injury
or
death.
Only
qualified service
personnel
with knowledge
of
fuels,
electricity,
and
machinery hazards
should
perform service procedures. Review safety
precautions on Inside
cover
page.
Trouble Possible Cause
Engine Does
1.
Control fuse
F1
may be open.
Not Crank
2.
If engine cranks at set but not at
remote control panel, fault is
due to:
a. PC board P2/J2 connection not
secure.
b.
Open circuit in remote control.
c.
Remote start switch faulty.
3.
If
engine cranks
at
remote
control panel but not at set, fault
is due to faulty
S1
switch.
4.1nsufficient voltage for cranking
due to:
(See Low Battery Voltage also.)
a.
Battery not charged.
b.
Terminal connections loose
or
dirty.
c.
Battery cable too small.
7-15
Corrective Action
1 . Replace fuse
F1
if
open with
Onan-supplied fuse only.
2a. Ensure that wiring harness jack
connections are fully seated to
PC
board.
2b. Check for continuity and correct if circuit
is open.
2c. Replace remote start control switch.
3. Replace PC board A 1.
4a. Check condition
of
battery and recharge
or
replace.
4b. Clean and tighten all connections at
battery,
K1
start solenoid, and starter
motor.
4c. Increase cable size.
lA
WARNlNG
I
Short
circuiting
the battery cables
can
result
In severe persona/Injury. Discon-
nect
the
negative(·)
battery cable
at
the bat-
tery terminal before servicing.
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