Error message
There are two ways to obtain the error message: by reading the appropriate display on the
handset display or by observing the fault codes issued by the status LED.
HANDSET DISPLAY DIAGNOSTICS
Faults are displayed in the Faults menu.
LED DIAGNOSTICS
During normal operation, with no faults present, the status LED is steadily on. If the controller
detects a fault, the status LED flashes a fault identification code continuously until the fault is
corrected.
The status LED uses a 2-digit code. For example, code "1,4"—UNDERVOLTAGE FAULT, appears as:
LED BLINKING
1212 MOTOR CONTROLLER
Error message
THERMAL FAULT
THROTTLE FAULT
SPEED POT FAULT
UNDERVOLTAGE FAULT
OVERVOLTAGE FAULT
MAIN OFF FAULT
(Not used)
MAIN FAULT
MAIN ON FAULT
(Not used)
WIRING FAULT
BRAKE ON FAULT
PRE-CHARGE FAULT
BRAKE OFF FAULT
HPD FAULT
CURRENT SENSOR FAULT
HARDWARE FAILSAFE
EE CHECKSUM FAULT
(Not used)
BATTERY DISCONNECT FAULT
1 SECOND STOP
LED BLINKING
LED BLINKING
digit 1
digit 2
1
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
1212 MOTOR CONTROLLER
LED
LED
BLINK-
BLINK-
ING
ING
digit 1
digit 2
1
1
1
2
1
3
1
4
1
5
2
1
1
2
3
2
3
2
4
4
5
3
1
1
2
3
2
3
4
3
3
5
3
4
1
2
3
5
3
4
4
1
5
1
2
4
2
3
4
4
3
5
4
5
Error
message
EXPLANATION
Error text
1. Temperature >80°C or <10°C.
Over-/
THERMAL
2. Excessive load on vehicle.
under-temper-
FAULT
3. Operation in extreme environments.
ature cutback
4. Electromagnetic brake not releasing.
PotLow and/or
1. Throttle input wire open or shorted.
THROTTLE
PotWiper out
2. Throttle potentiometer defective.
FAULT
of range
3. Wrong throttle type selected.
Speed limit
1. Speed limit potentiometer wire(s)
SPEED POT
potentiometer
broken or shorted.
FAULT
wiper out of
2. Broken speed limit potentiometer.
range
UNDER-
1. Battery voltage <17 volts.
Battery volt-
VOLTAGE
2. Poor connection at battery or
age too low
FAULT
controller.
1. Battery voltage >31 volts.
OVERVOLT-
Battery volt-
2. Vehicle operating with charger
AGE FAULT
age too high
attached.
3. Intermittent battery connection.
MAIN OFF
Main contactor
1. Main contactor driver failed to open.
FAULT
driver Off fault
Main contactor
1. Main contactor welded or stuck open.
MAIN FAULT
fault
2. Main contactor driver fault.
MAIN ON
Main contactor
1. Main contactor driver failed closed.
FAULT
driver On fault
HPD fault
1. Misadjusted throttle.
WIRING
present >10
2. Broken throttle potentiometer or
FAULT
sec.
throttle mechanism.
BRAKE ON
1. Electromagnetic brake driver shorted.
Brake On fault
FAULT
2. Electromagnetic brake coil open.
PRE-
1. Brake driver shorted.
Pre-charge
CHARGE
2. Pre-charge circuit damaged.
fault
FAULT
3. MOSFET failure.
BRAKE OFF
1. Electromagnetic brake driver open.
Brake Off fault
FAULT
2. Electromagnetic brake coil shorted.
1. Improper sequence of throttle and
HPD (High
HPD FAULT
KSI, push or inhibit inputs.
Pedal Disable)
2. Misadjusted throttle potentiometer.
CURRENT
Current sense
1. Short in motor or in motor wiring.
SENSOR
out of range
2. Controller failure.
FAULT
1. Motor voltage does not correspond to
HARDWARE
Motor voltage
the throttle request.
FAILSAFE
out of range
2. Short in motor or in motor wiring.
3. Controller failure.
EE CHECK-
EEPROM fault
1. EEPROM failure or fault.
SUM FAULT
BATTERY
Battery
1. Battery not connected.
DISCON-
disconnected
2. Poor connection to battery terminals.
NECT FAULT
Possible cause