Upright LX31 Service Manual

MOS90 Fault Finding Flow Charts Section 3 - Troubleshooting
Page 3-10 067448-023 LX31/LX41 Electric and Bi-Energy Work Platform | European Specifications
4 Flashes
- Direction contactor welded.
(Point "A" within 6V of B+ve
in neutral)
- Leakage between motor
armature and field.
- Drive inhibited.
- Flashes in neutral until
fault is cleared
Check direction contactor tips
Free/change tips
Check power wiring for shorts
Rectify
Check motor for armature to field shorts or
leakage
Rectify
Check for shorts to frame and battery leakage
Rectify
Replace MOS90 Controller
5 Flashes
- Direction contactors (or line
contactor) did not close.
- Motor armature or field
open circuit.
- Point "A" not within 6V of
B+ve within one second of
selecting direction.
- Drive inhibited.
- Flashes until fault is cleared,
when contactor closes.
Check contactor tips
Repair/replace
Check contactor for mechanical operation and
coil O.K.
Repair/replace
Check power and control wiring
Rectify
Check for open circuit motor
Rectify
Replace controller

Upright LX31 Specifications

General

Brand	Upright
Model	LX31
Category	Lifting Systems
Language	English