Capacitor voltage is low before the line
contactor closes.
Symptom
Lift truck does not move.
Line contactor does not close.
Motor controller capacitor does not pre-charge.
Possible Causes and Test Procedures
- Control fuse open.
Check control fuse for open circuit; replace fuse if
necessary.
- Faulty PTC.
Replace PTC.
- Verify that the hydraulic pump motor contactor tips
are not welded.
If the contactor tips are welded, replace the contactor
tips.
- Accessory or component other than motor controllers
connected to load side of line contactor.
Verify that the traction and pump motor controllers
are the only components on the load side
of the line contactor.