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REV. 07/2020
2
H
LED
BLINKS
digit 1
LED
BLINKS
digit 2
Error Message
Explanation
Possible cause
Error text
1
1
THERMAL FAULT
over-/under-temperature
cutback
1. Temperature >80°C or <
-10°C.
2. Excessive load on vehicle.
3.Operation in extreme
environments.
4.Electromagnetic brake not
releasing.
1
2
THROTTLE FAULT
Pot Low and/or Pot
Wiper out of range
1.Throttle input wire open or
shorted.
2.Throttle pot defective.
3.Wrong throttle type
selected.
1
3
SPEED POT FAULT
speed limit pot wiper out
of range
1.Speed limit pot wire(s)
broken or shorted.
2. Broken speed limit pot.
1
4
UNDER VOLTAGE
FAULT
battery voltage too low
1. Battery voltage <17 volts.
2. Bad connection at battery
or controller.
1
5
OVER VOLTAGE
FAULT
battery voltage too high
1. Battery voltage >31 volts.
2. Vehicle operating with
charger attached.
3.Intermittent battery
connection.
2
1
MAIN OFF FAULT
main contactor driver Off
fault
1.Main contactor driver failed
open.
2
3
MAIN FAULT
main contactor fault
1.Main contactor welded or
stuck open.
2. Main contactor driver fault.
2
4
MAIN ON FAULT
main contactor driver On
fault
1.Main contactor driver failed
closed.
3
1
WIRING FAULT
HPD fault present >10
sec.
1.Misadjusted throttle.
2.Broken throttle pot or
throttle mechanism.