User Manual

Troubleshooting
M
40.2
© MOSA REV.0-09/08
01/09/08 35770-GB
GE 7000-7500 HSX
The motor does not start up, or
starts up and then stops
immediately
1) Key and start-up selector in the wrong
positions
2) Lack of or insufficient oil in the motor
3) Faulty motor stopping device (oil-alert)
4) Lack of fuel in tank or fuel tap closed
5) Bad gasoline
Gasoline oxidizes and deteriorates over time,
causing hard starting
6) Dirty or faulty spark plug
7) Battery not activated, low or faulty
8) Battery cable terminals loose or corroded
9) Cold motor
10) Fuel filter restricted, carburetor malfunction,
ignition malfunction, valves stuck, etc.
1) Verify start-up procedure in the Operating Manual
2) Refill or top off
3) Replace
4) Refill the tank. Open the fuel tap
5) Drain fuel tank and carburetor. Refuel with fresh gasoline.
6) Clean or check and eventually replace
7) Activate, recharge, or replace the battery
8) Tighten and clean. Replace if corroded.
9) Please keep the CHOKE control in “CLOSE” position
for a longer time after the starting.
10) Replace or repair faulty components. Ask for
intervention of Service Department
No-load voltage too low or too
high
Problem Possible cause Solution
ENGINE
1) Check the air filter
2) Bad gasoline
3) Fuel filter restricted, carburetor malfunction,
ignition malfunction, valves stuck, etc.
GENERATOR
1) Protection tripped due to overload
2) Differential protection device tripped
3) Protection devices defective
4) Alternator not sparked
5) Alternator defective
1) Clean or replace filter element(s). Refer to engine manual
2) Drain fuel tank and carburetor. Refuel with fresh gasoline
3) Replace or repair faulty components.
Ask for intervention
of Service Department
1) Check the load connected and diminish
2) Check on the entire installation: cables, connections,
utilities connected have no defective sheathing which
may cause incorrect currents to ground
3) Replace
4) Carry out external spark test as indicated in alternator
manual. Ask for intervention of Service Department
5) Check winding, diodes, etc. on alternator (Refer to
alternator manual)
Repair or replace.
Ask for intervention of Service Department
1) Regulate speed to its nominal no-load value
2) Check winding, diodes, etc. on alternator (Refer to
alternator manual).
Repair or replace.
Ask for intervention of Service Department
1) Check the load connected and diminish
2) Reduce or rephase load
3) Check winding, diodes, etc. on alternator (Refer to
alternator manual)
Repair or replace.
Ask for intervention of Service Department
1) Check electrical connections and tighten
2) Ask for intervention of Service Department
3) Check winding, diodes, etc. on alternator (Refer to
alternator manual)
Repair or replace.
Ask for intervention of Service Department
The motor does not accelerate.
Inconstant speed.
Too little power provided by
motor.
Absence of output voltage
Corrected no-load voltage too low
with load
Unstable tension
1) Incorrect motor running speed
2) Alternator defective
1) Incorrect motor running speed due to
overload
2) Load with cos ϕ less than the nominal one.
3) Alternator defective
1) Contacts malfunctioning
2) rregular rotation of motor
3) Alternator defective