Southworth Stack-N-Go FPS3000-43NFO-21, Owner'S Manual

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17 Southworth Products FPS3000-43NFO-21/27 Manual
7. Troubleshooting
Turn off key and disconnect the battery before performing any
maintenance.
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