CodeCode
Programmer displayProgrammer display
Probable fault reasonProbable fault reason
Deep faultDeep fault
reason/troubleshootingreason/troubleshooting
Fault displayFault display
BrakeBrake
Pump stops workingPump stops working
4. 4. Fuse Fuse protector protector disconnectsdisconnects. . contactorcontactor, , restart restart the the key key switch.switch.
4141
Throttle Wiper HighThrottle Wiper High
Throttle invalidThrottle invalid
1. Throttle pot wiper voltage too1. Throttle pot wiper voltage too
highhigh
ReasonReason：： Throttle Throttle pot wpot wiper(piniper(pin
16) voltage is higher than the16) voltage is higher than the
high fault threshold(can behigh fault threshold(can be
changed with the VCL functionchanged with the VCL function
setup_pot_faults()setup_pot_faults()
））
TroubleshootingTroubleshooting：： Reduce Reduce thethe
throttle pot wiper voltagethrottle pot wiper voltage
4242
Throttle Wiper LowThrottle Wiper Low
Throttle invalidThrottle invalid
1. Throttle pot wiper voltage too1. Throttle pot wiper voltage too
lowlow
ReasonReason
：：
Throttle Throttle pot wpot wiper(piniper(pin
16) voltage is lower than the low16) voltage is lower than the low
fault threshold(can be changedfault threshold(can be changed
with the VCL functionwith the VCL function
setup_pot_faults()setup_pot_faults()））
TroubleshootingTroubleshooting：： Raise Raise thethe
throttle pot wiper voltagethrottle pot wiper voltage
4343
Pot 2 Wiper HighPot 2 Wiper High
Full brakeFull brake
1. Pot 2 wiper voltage too high1. Pot 2 wiper voltage too high
ReasonReason：：Pot 2 wiper(pin 17)Pot 2 wiper(pin 17)
voltage is higher than the highvoltage is higher than the high
fault threshold(can be changedfault threshold(can be changed
with the VCL functionwith the VCL function
setup_pot_faults()setup_pot_faults()
））
TroubleshootingTroubleshooting：： Reduce the potReduce the pot
wiper voltagewiper voltage
4444
Pot2 Wiper LowPot2 Wiper Low
Full brakeFull brake
1. Pot 2 wiper 1. Pot 2 wiper voltage too low.voltage too low.
ReasonReason
：：
Pot 2 Pot 2 wiper(pin 1wiper(pin 17)7)
voltage is lower than the low faultvoltage is lower than the low fault
threshold(can be changed withthreshold(can be changed with
the VCL functionthe VCL function
setup_pot_faults()setup_pot_faults()））
TroubleshootingTroubleshooting：：Increase the potIncrease the pot
wiper voltagewiper voltage
4545
Pot Low OvercurrentPot Low Overcurrent
Throttle invalidThrottle invalid
Full brakeFull brake
1. Potentiometer impedance is too1. Potentiometer impedance is too
low.low.
ReasonReason
：：
Pot low Pot low end (pin 18)end (pin 18)
exceeds 10mA.exceeds 10mA.
Troubleshooting: Reduce low endTroubleshooting: Reduce low end
current, restart the key switchcurrent, restart the key switch
4646
EEPROM FailureEEPROM Failure
Motor stopsMotor stops
Main contractor stops.Main contractor stops.
EM brake stopsEM brake stops
Throttle stopsThrottle stops
Interlock stopsInterlock stops
Driver1-4 stopDriver1-4 stop
PD stopsPD stops
BrakeBrake
Pump stopsPump stops
1. Error writing to the 1. Error writing to the EEPROMEEPROM. It. It
may be caused by VCL writing tomay be caused by VCL writing to
EEPROM, or CANBUS, orEEPROM, or CANBUS, or
incorrect parameter editing.incorrect parameter editing.
ReasonReason
：：
Controller system tries toController system tries to
write into EEPROM but failed.write into EEPROM but failed.
TroubleshootingTroubleshooting：：DownloadDownload
correct software(OS), set correctcorrect software(OS), set correct
parameterparameter, and then , and then restart therestart the
key switch.key switch.
4747
HPD/Sequencing FaultHPD/Sequencing Fault
Throttle invalidThrottle invalid
1. Wrong sequence setting of key1. Wrong sequence setting of key
start, interlock, direction andstart, interlock, direction and
throttle input sequence setting.throttle input sequence setting.
2. Wiring, 2. Wiring, switch keyswitch key, interlock,, interlock,
direction or throttle input fault.direction or throttle input fault.
ReasonReason
：：
The wrong input of keyThe wrong input of key
start, interlock, direction andstart, interlock, direction and
throttle cause HPD andthrottle cause HPD and
sequencing fault.sequencing fault.
TroubleshootingTroubleshooting：：Re-inputRe-input
according to correct sequence.according to correct sequence.
4747
Emer Rev HPDEmer Rev HPD
Throttle invalidThrottle invalid
1. Emer Rev already finished, but1. Emer Rev already finished, but
the throttle, forward or reversethe throttle, forward or reverse
input and interlock do not return toinput and interlock do not return to
neutral.neutral.
ReasonReason：：After Emer Rev fiAfter Emer Rev finishes,nishes,
each input does not return toeach input does not return to
neutral, that cause the fault.neutral, that cause the fault.
TroubleshootingTroubleshooting
：：
Re-inputRe-input
according to correct sequence.according to correct sequence.
4949
Parameter Change FaultParameter Change Fault
Motor stops workingMotor stops working
Main contractor stops workingMain contractor stops working
EM brake stops workingEM brake stops working
Throttle invalidThrottle invalid
BrakeBrake
1. In 1. In order to protect order to protect truck safetytruck safety,,
change of certain specialchange of certain special
parameter is only valid after restartparameter is only valid after restart
the key switch.the key switch.
ReasonReason：：Parameter changeParameter change
needs restart of the key switch.needs restart of the key switch.
TroubleshootingTroubleshooting
：：
Restart the keyRestart the key
switchswitch
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