MQ GA-2.9R —TROUBLESHOOTING (GENERATOR)
Practically all generator breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, please take a remedial action following the
diagnosis based on the Generator Troubleshooting (Table 7) information shown below and on the preceding page. If the problem cannot be remedied, please leave the unit just as it is and consult our company's business office or service plant.
TABLE 7. GENERATOR TROUBLESHOOTING
SYMPTOM | POSSIBLE PROBLEM | SOLUTION | |
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Low voltage | Engine speed too low? | Raise engine speed to rated RPM. | |
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| AC voltmeter not working? | Replace AC voltmeter. | |
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| Control box internal wiring | Check control box wiring. | |
| malfunction? |
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Low voltage. Engine speed | Defective ignition coil? | Check red and green ignition wires. Replace ignition wires if | |
normal 3650 RPM (unloaded), |
| necessary. | |
2500 RPM (idle) |
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Rotor winding malfunction? | Check or replace rotor. | ||
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| Stator winding malfunction? | Check or replace stator. | |
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| Breaker malfunction? | Check or replace CB1. | |
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Voltage output too high. | Engine speed too high? | Lower engine speed to rated RPM. | |
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Voltage output too high. Engine | Control box internal wiring | Check control box wiring. | |
speed normal 3650 RPM | malfunction |
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(unloaded), 2500 RPM (idle) |
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Circuit breaker will not turn on | Defective circuit breaker? | Replace circuit breaker. | |
"NO LOAD" |
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Circuit breaker will turn on | Overload? | Reduce load or replace breaker. | |
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"LOADED" but trips immediately. | Load circuit is shorted? | Check load circuit for short. | |
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Does not accelerate from low to | Stuck solenoid? | Check solenoid. | |
high "NO LOAD" |
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Does not accelerate from low to | Control box interal wiring | Check control box wiring. | |
high "LOAD ACTIVE | defective? |
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| Defective rotor windings? | Check or replace rotor. | |
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Does not decelerate no | Defective solenoid? | Check or replace solenoid. | |
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"VOLTAGE OUTPUT". | Defective idle control device? | Check or replace idle control device. | |
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| Defective solenoid? | Check or replace idle control device. | |
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| Control box wiring malfunction? | Check control box wiring, replace any defective components. | |
Does not decelerate but has |
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Defective solenoid? | Check or replace solenoid. | ||
"VOLTAGE OUTPUT". | |||
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| Idle control device malfunction? | Check or replace idle control device. | |
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MQ