MDC XT14E - Page 34

33
1300 4X4 4X4
Code of
malfunction
Description of
malfunction
Malfunction reason
Troubleshooting
1
Over-voltage
or Under-
voltage
Voltage is beyond
nominal voltage ±25%
Check your power supply by multimeter. If below nominal
voltage 25%, pls recharge or change battery. If above
nominal voltage 25%, please change your power supply.
2
Over-heating
1. Blockage in the air
inlet or air outlet
Clear the air inlet or air outlet if there is a blockage.
2. Blockage in the
exhaust pipe
Clean the exhaust pipe if there is a block.
3
Fault of flame
sensor
1. Incorrect connection
Check all the plug-in connectors and ensure lead is not
loose. Rectify if required.
2. Short circuit or open
circuit of lead
Check for a short circuit or open circuit of lead of flame
sensor with a multimeter. Fix it or replace as necessary.
3. Damage of motor
Check continuity of flame sensor by multimeter. If it fails
replace it
4
Fault of motor
1. Incorrect connection
Check all the plugs for secure connection and rectify if
necessary
2. Short circuit or open
circuit of lead
Check whether there is short circuit or open circuit of
motor lead by multimeter. If yes, please fix it or replace it.
3. Damage of motor
Check whether motor rotation is normal after energized
detection. If not, please replace it.
5
Fault of glow
plug
1. Incorrect connection
Check whether all the plug connections are secure and
rectify where necessary
2. Short circuit or open
circuit of lead
Check whether there is short circuit or open circuit of
motor lead by multimeter. If yes, please fix it or replace it.
3. Damage of glow
plug
Check glow plug’s resistance between two leads. If it is
not between 1-4 ohms, pls replace it
6
Fault of over-
heating
sensor
1. Incorrect connection
Check all the plugs for secure connection and rectify if
necessary
2. Short circuit or open
circuit of lead
Check whether there is short circuit or open circuit of lead
by multimeter. If yes, please fix it or replace it.
3. Damage of over-
heating sensor
Check whether there is a damage of over-heating sensor.
If yes, please replace it.
7
Fault of fuel
metering
pump
1. Incorrect connection
Check all the plugs for secure connection and rectify if
necessary
2. Short circuit or open
circuit of lead
Check whether there is short circuit or open circuit of lead
with multimeter. If yes, please fix it or replace it.
3. Damage of fuel
metering pump
Check fuel pump’s resistance between two leads. If it is
not between 15-25 ohms, pls replace it
8
Fault of
temperature
sensor
1. Short circuit or open
circuit of lead
Check whether there is short circuit or open circuit of lead
by multimeter. If yes, please fix it or replace it.
2. Damage of
temperature sensor
Check whether there is a damage of temperature sensor.
If yes, please replace it.