ep ICE301B - Troubleshooting Solutions of Common Faults

22
REV. 09/2020
23
REV. 09/2020
TROUBLESHOOTING TROUBLESHOOTING
3 3
3.2 Troubleshooting Solutions of Common Faults
Table 3.1 lists the common faults that may occur and handling
methods. Mainly consists of the following items:
Table 3.1 Troubleshooting of Common Faults
Fault Fault Symptom Probable Causes Troubleshooting
Power supply
failure
1. Whole vehicle power
outrage
• Power supply failure
• Fuse failure
• Emergency stop switch or circuit
failure
• Key switch or circuit failure
1. Check the voltage of storage
battery
2. Check the fuses
3. Check key switch and its
circuit
4. Check emergency stop switch
and its circuit
Travel Fault
1. Forward and reverse
moving failures of
the vehicle, but other
functions are normal
• Parking brake switch and seat
switch or its circuit connection
failure
• Gearbox failure
• Travel switch or its circuit
connection failure
• Drive motor or its circuit
connection failure
• Controller failure
Controller failure error, carry out
troubleshooting according to the
fault code information on the
instrument.
1. Check if parking brake
switch and seat switch or the
connection of its circuit is
normal;
2. Check the gearbox;
3. Check the travel switch and
its connection circuit;
4. Check the drive motor and its
connection circuit;
5. Replace the controller.
2. The vehicle can
travel at low speed,
but cannot travel at
high speed
Failures due to external factors:
• Motor bearing blocked
• Gearbox bearing blocked
Failures due to internal factors:
• Drive motor speed encoder
failure
• Controller failure
Controller failure error, carry out
troubleshooting according to the
fault code information on the
instrument .
1. Remove the motor, check if
the motor rotation is normal;
2. Check the speed encoder
and its connection circuit;
3. Remove the gearbox, check
if the gear rotation is smooth
and if there is blocking;
4. Replace the controller
3. Drive axle Bearings
noise or jammed
• Bearing fatigue damage or
foreign
1. Replace the bearings
* Carry out trouble shooting in accordance with the order listed in the table, it can help you quickly
identify problems and resolve accordingly.
Travel Fault
4. Abnormal tyre
wear, cracking or
degumming
• Improper use
1. Replace the drive wheel;
2. Replace the rear steering
wheel.
5. Drive wheel slipping
or jumping
• Wear
1. Replace the drive wheel
6. Vehicle sways while
running
• Wheel lock nut loosening
1. Tighten the nuts
7. Brake performance
weakened or failure
• Insu󰀩cient brake uid;
• Brake master pump blocked;
• Brake pipeline leaks.
1. Add brake uid;
2. Replace the master pump;
3. Replace the brake pipeline.
Motor Fault
1. Motor does not
rotate
• Cable U, V, or W is broken;
• Loosening connections to cable
U, V or W ;
• Stator coil open circuit;
• Motor bearing damage;
• Speed encoder or its circuit
failure.
1. Replace the Cable U,V, or W;
2. Tighten the nut;
3. Check the stator coil;
4. Replace the motor bearing;
5. Check the speed encoder, if
neccessary replace it.
2. Motor is rotating
in slow speed and
reverse
• Cable connection error
1. Remove the cables and re-in-
stall;
3. Motor with abnormal
noise or vibration
• Uneven clearance between stator
and rotor;
• Bearing failures;
• Loosening xing screws on motor
housing.
1. Replace the drive motor or
pump motor;
4. Motor smoking or
burning smell
• Stator winding short circuit, motor
burnt
1. Replace the drive motor or
pump motor;
5. Motor temperature
too high, controller
failure
• Stator winding short circuit;
• Motor U, V and W terminals with
surface ;
• Bearing failure, resulting in
severe heating;
• Motor cooling duct blockage with
foreign body;
• Overload.
6. Refer to the rated capacity
marked on the nameplate;
Table 3.1 Troubleshooting of Common Faults
Fault Fault Symptom Probable Causes Troubleshooting
* Carry out trouble shooting in accordance with the order listed in the table, it can help you quickly
identify problems and resolve accordingly.