Faults And Causes - EP Equipment CPD30L1-B Service Manual

DRIVE SYSTEM
Installation
- Install according to the reverse order of rem-
oval.
- Motor gear should fully engage with the gear
within the gearbox, rotate the gearbox without
blocking, and then fix it with four screws.
Speed Encoder
Removal
5
-
Switch off the truck power connections and
remove the pedal;
- Unplug the AMP connector on the speed
encoder (2, Fig3131-20008SM) ;
- Unscrew the screw (1) from the drive motor
and remove the speed encoder.
Installation
- Install according to the reverse order of rem-
oval.
REV. 05/2020
CAUTION

5.2.2 Faults and Causes

Fault Motor does not rotate
a. Cable U, V, or W is broken;
b. Loosening connections to cable
U, V or W ;
1
Cause c. Stator coil open circuit;
d. Motor bearing damage;
e. Speed encoder or its circuit
failure.
Motor is rotating in slow speed and
Fault
reverse
2
Cause Cable connection error
Motor with abnormal noise or
Fault
vibration
a. Uneven clearance between
3
stator and rotor;
Cause b. Bearing failures;
c. Loosening fixing screws on
motor housing.
Fault Motor smoking or burning smell
4
Stator winding short circuit, motor
Cause
burnt
Motor temperature too high,
Fault
controller failure
a. Stator winding short circuit;
b. Motor U, V and W terminals with
surface ;
5
c. Bearing failure, resulting in
Cause
severe heating;
d. Motor cooling duct blockage
with foreign body;
e. Overload.
On load, motor speed is turning
Fault
slow
a. Insufficient voltage of battery;
b. Overload;
6
c. U, V, W terminals with abnormal
Cause
voltage input;
d. Speed encoder or its circuit
failure.
40