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7. Troubleshooting
Unit will not lift (motor does not run)
•
Faulty wiring from fuse to lift switch in handle
•
Faulty lift switch
•
Faulty wiring from battery positive terminal to pump contactor to pump motor.
•
Burned out brushes in pump motor
•
Low hydraulic pressure caused by:
•
Pressure relief valve needs adjustment
•
Pump check valve stuck open
•
Faulty solenoid valve
•
Faulty wiring from lift switch to solenoid
•
Faulty lift contactor
•
Defective control circuit fuse
•
Chain or roller bound
•
Check oil level
Forks will not lower
•
Look for binding in chains or rollers
No electrical power
•
Dead Batteries:
•
Keyswitch on "OFF" position
•
E-stop button depressed
•
Loose or dirty battery connections
•
Blown fuse(s)
•
Faulty wiring from fuse to travel control switch
•
Faulty control switch
•
Faulty wiring from travel control switch direction contactor
•
Faulty contactor
Presto Lifts
Turn off key and disconnect the battery before performing any
maintenance.
17
PPS2200-62NFO-21/27 Manual
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