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One of our 6581B GE machine (Mark V) at 20% speed "liquid fuel control fault" alarm appeared while unit was running on Gas fuel selected. liquid flow was showing above 3%.
Liquid fuel control fault, L3LFLT, is indicated when flow feedback is above 3% with the stop valve closed or when the liquid fuel servo current is in negative saturation.
Liquid fuel accessory gear driven pump was rotating during the startup with 100-150 RPM, In other units also pump is rotation during startup on gas fuel, but alarm appeared in this units only.
We have checked all flow divider pickups, all check valves and stop solenoid valve leakages, all are found OK.
Anybody can suggest what to be checked further?
Appreciated for your valuable suggestions.
Thanks,
Joy
Liquid fuel control fault, L3LFLT, is indicated when flow feedback is above 3% with the stop valve closed or when the liquid fuel servo current is in negative saturation.
Liquid fuel accessory gear driven pump was rotating during the startup with 100-150 RPM, In other units also pump is rotation during startup on gas fuel, but alarm appeared in this units only.
We have checked all flow divider pickups, all check valves and stop solenoid valve leakages, all are found OK.
Anybody can suggest what to be checked further?
Appreciated for your valuable suggestions.
Thanks,
Joy