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Onan 7NHM-FA/26105F User Manual

Onan 7NHM-FA/26105F
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lA wARNlNG! Many troubleshooting procedures present hazards which can result In se-
vere persona/Injury
or
dea_th.
Only qualified service personnel with knowledge
of
fuels,
electricity,
and
machinery hazards should perform service procedures. Review safety
precautions on Inside cover page.
Trouble
Engine Does
Not Crank
· Engine Cranks
But Does Not
Start
Possible Cause
5. Connect a voltmeter between
terminalS
on the start solenoid
and ground. Check for battery
voltage when
S1
is placed in
START position. If voltage is
present, fault is due to:
a.
K1
start solenoid not grounded.
b. Defective
K1
start solenoid.
c. Defective starter.
6. If voltage is not present as
described in step 5 test, fault
is
due to:
a. Open circuit between
K1
relay
and control PC board.
b. Defective control PC board.
7. B+ fuse (F1) is open.
1 . Faulty ignition due
to
worn
or
fouled spark plugs, faulty plug
wires, faulty ignition coil
or
control module.
2. Faulty tuel system due to low
fuel level in tank, supply valve
not open, sticking choke, faulty
fuel pump/fuel solenoid,
or
carburetor mixture screws
incorrectly adjusted.
3. Bad reiay K4 and/or fuse F2
1
4. Connect a voltmeter between
I
positive(+)
terminal
E1
ignition
il'
coil
and_
ground. Check for bat-
tery
voltage when 81 is placed
1
in
START
position.
if
voltage
1 not present, fau
It
due to:
I a. Open
E1
coil-to-control circuit.
j Defective control PC board,
I
Corrective Action
5a. Tighten solenoid bracket mounting
screw.
5b. Replace
K1
start solenoid.
5c. Refer to
Electric Starter (Section 6) for
test and service procedures.
6a. Check for continuity and correct if circuit
is open.
6b. Replace control PC board.
7. Replace fuse.
6
1 . Refer
to
Ignition System (Section 6) for
test and service procedures.
2. Refer
to
Fuel System (Section 6) for test
and service procedures.
3. Replace relay and/or fuse.
4. a. Check for continuity and correct
if
circuit is open.
4. b. Test/replace control PC board.

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Onan 7NHM-FA/26105F Specifications

General IconGeneral
BrandOnan
Model7NHM-FA/26105F
CategoryInverter
LanguageEnglish

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