Installation Guide

Common Faults and Repair Methods of Generator
Number Fault Symptoms Reason & Troubleshooting
1 Generator
without power
indication
1. Check whether battery is damaged
2. Fuse broken
(Check, replace)
2 Generator has
power indication
but no power
output
1. Breaker not open
2. AC output is poorly connected (Check)
3. Check AVR and its fuse
4. Check carbon brush
3 Generator
overheating
1. Lack of coolant or pipe blocked (Add coolant or clean up radiator hoses)
2. Thermostat closed or damaged
3. Water pump worn out or damaged (Clean or replace pump)
4. Too much engine oil (Remove the unnecessary engine oil)
5. Damage of rotor bearing (Replace bearing)
6. Radiator blocked or damaged (Clean or replace radiator)
7. Short circuit of stator winding (Check wiring)
8. Rubbing of stator and rotor (Check, adjust gap)
4 Insufcient pow-
er output
1. Abnormal gas pressure (adjust pressure)
2. Engine throttle worn out
3. Air lter blocked
4. Some spark or cylinder wire is damaged
5. Too much oil
6. Piston ring worn out
Common Faults and Repair Methods of Engine
Symptoms Possible Solutions
Controller has no response with
power.
Check starting batteries;
Check controller connection wirings;
Check DC fuse.
Generator shuts down
Check the water/cylinder temperature is too high or not;
Check the genset AC voltage; check DC fuse.
Low oil pressure alarm after crank
disconnect
Check oil level, then oil pressure sensor and its connections.
High coolant temp alarm after crank
disconnect
Check coolant level, then temperature sensor and its connections.
Shutdown Alarm
Check related switch and its connections according to the information
on LCD; check auxiliary input ports.
Fail to start
Check fuel oil circuit and its connections; check starting batteries;
Check speed sensor and its connections; refer to engine manual.
Starter no response Check starter connections; check starting batteries.
Stepping Motor Reverse
Cross connect the S11 and S12;
Cross connect the S21 and S22;
Change conguration (motor reduce direction) via PC.
GOV is out of control.
Check the speed sensor voltage is no less than 2V when cranking.
Check the connections of S11, S12, S21, S22.
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