Product Manual

IMD LLC_____________________________________________________ 24
10011-12 04/15
Troubleshooting - *For Authorized Service Only
Problem
Possible Fault
Correction
PTO shaft turns, but
alternator does not.
1. Damaged gearbox.
2. Broken Tapered Shaft.
3. Broken Rotor shaft
1. Replace Gearbox
2. Call IMD LLC
3. Call IMD LLC
Alternator Does not
excite
1. Demagnetized machine
2. Reduced speed
3. Faulty rotating diodes
4. Failure in the winding
5. Faulty capacitor (AVR
board)
1. Apply to terminals a DC voltage
between 6-12V for max. 1 second (Only
Capacitor regulated.)
2. Check speed and bring to the rated value
3. Check and replace
4. Check the winding resistance
5. Check and replace
2pc 25MF450V
(AVR Board)
Low no-load voltage
1. Reduced Speed
2. Faulty rotating diodes
3. Wrong capacitor value (AVR
settings)
4. Faulty windings
1. Check speed and regulate
2. Check and replace
3. Check and replace
2pc 25MF450V
(AVR board)
4. Check the winding resistance
High no-load voltage
1. Excessive motor Speed
2. Wrong capacitor value (AVR
settings)
1. Check speed and regulate
2. Check and replace
2pc 25MF450V
(AVR board)
Correct no-load voltage
and too low full-load
voltage
1. Overload
2. Engine speed slows down
3. Faulty rotating diodes
1. Check the load current
2. Check motor capacity
3. Check and replace
Unstable Voltage
1. Loose connections
2. Irregular rotation
1. Check connections
2. Verify the rotation uniformity
Machine Overheating
1. Partially obstructed ventilation
openings
2. Probable overload
1. Remove and clean the air inlet and outlet
grids
2. Check the load
Noisy machine
1. Damaged shaft or gearbox
2. Faulty bearings
1. Check mechanical connection and
gearbox
2. Check and replace
Spare Parts:
To obtain spare parts for your PTO generator, please contact your IMD dealer
or to find a dealer in your area, please call 1.864. 968.0858. www.imdllc.com
To enable us to help you quickly, please provide the model and serial number
for your PTO generator.