1055
UnclassifiedGeneral
What This Code Means
VSCF Phase Error; Vrms > 125 & Hz < 45 while ramping; An incorrect voltage and frequency has been detected during starting
Possible Causes
- •Brush harness connector is damaged
- •Faulty brushes, slip rings, AVR, or AVR 3-phase connections
- •Stator output voltage is greater than 125 VRMS but frequency is less than 45 Hz
- •The brushes are arcing or worn
- •The brushes are incorrectly wired
- •The brushes are not connecting to the slip-ring
- •The gas pressure is low and the engine is not coming up to speed
- •The generator has started into a severe load
- •The rotor is shorted
- •The stepper motor is not working or the linkage is binding
Suggested Actions
- 1Check for Overload conditions
- 2Check for proper fuel supply and settings must be within specifications of unit
- 3Check for proper fuel supply and settings within specifications of unit
- 4Check rotor resistance at slip rings
- 5Check stepper operation
- 6Open MLCB and retest unit
- 7Perform Rotor Brush test
- 8Perform stepper motor test
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