Troubleshooting - Mosa GE 4500 SX Manual De Uso Y Mantenimiento

Trouble shooting
Problem
The motor does not start up, or starts
up and then stops immediately
Lack of tension to the AC sockets
(Only AVR Vers.)
No-load output voltage too low or
too high
(Only AVR Vers.)
No-load voltage OK, too low with load
(Only AVR Vers.)
Lack of tension to the c.c. terminals
The battery discharges itself fre-
quently
Possible cause
1) Key/engine switch 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) Dirty or faulty spark plug
6) Battery not activated, low or faulty
7) Faulty start relay
8) Cold motor
9) Other causes
1) G.F.I. switch in the OFF position
2) Intervention of G.F.I. switch due to faulty
ground current
3) Faulty G.F.I. switch
4) Intervention of circuit breaker (thermo-
protection)
5) Faulty thermoprotection
6) Faulty alternator
7) AVR fuse blown
8) Faulty AVR
1) Incorrect motor speed
2) Faulty alternator
3) AVR out of calibration or fault
1) Faulty alternator
2) Overload
3) Number of motor rpm too low
4) Faulty AVR
1) Thermoprotection intervention
2) Faulty thermoprotection
3) Faulty diode bridge rectifier
4) Faulty alternator winding
1) Intervention of battery charge thermo-
protection
2) Faulty battery charge circuit
3) If connected to EAS automatic panel.
GE 4500 HSX
GE 4500 SX / GE 4500 SXE - EAS
GE 4500 SXE-AVR EAS
Solution
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) Clean or check and eventually replace
6) Activate, recharge, or replace the battery
7) Replace
8) Hold the CHOKE control, after start-up, for a longer
period of time
9) Consult the motor Operating Manual.
1) Position to ON
2) Disconnect load from AC sockets.
Position the G.F.I. switch to ON; if the switch
intervenes once again, the fault is on board the
machine.
Contrarily, the cause of the G.F.I. switch interven-
tion is due to a faulty ground current in the load or
connection cable. Find and remove the fault.
3) Replace
4) Check total power supplied by generator; if gre-
ater than the power reported on the specification
nameplate, decrease the load
5) Replace
6) Check rotating diode windings, alternator excitation
capacitor.
See specifc alternator manual.
7) Check and replace
8) Check and replace
1) Set the motor's no-load speed
2) Check rotating diode windings, alternator excitation
capacitor.
See specifc alternator manual.
3) Adjust VOLT potentiometer of the AVR replace
1) Replace rotating diodes
2) Check total load and eventually decrease
3) Check the fuel supply circuit.
See Motor Operating manual.
4) Check and replace
1) Check the load current and eventually decrease it.
2) Replace
3) Replace
4) Replace
1) Reset thermoprotection circuit breaker. In case of
new intervention, check battery.
2) Check: battery charge winding, battery charge dio-
de, T1 and M3 respectively on electrical diagram.
Replace.
3) Replace panel (faulty battery charge circuit on
EAS panel).
M
40.2
REV.1-12/11