Trouble Shooting Chart Letrix Power ECU 24volts
Code
LCD Display
Explanation
Possible Cause
1.1
Throttle Fault 1
throttle fault
1. Throttle input wire open or shorted
2. Throttle pot defective
3. Wrong Throttle type selected
over temperature
cutback
1. Temperature >92°c
2. Excessive load
3. Extreme enviroment
4. Brake not releasing
Thermal Cutback
1.2
1.3 Speed Pot Fault
speed limit pot fault
1. Speed limit pot wire broken
2. Speed limit pot worn or bad
1.4 Low Battery
battery volts too low
1. Battery Voltage below 8.5volts
2. Loose or bad battery terminal
1.5 Over voltage
battery volts too high 1. Battery Voltage >45 volts
2. Charger connected
3. Bad battery terminal
2.1 Main Off Fault
main contactor Off
1. Main contactor failed
2.3
Proc / wiring fault
HPD present <10sec
1. Main Contactor Open
2. Main Contactor faulty
3. Brake coil resistance too high
Main Contactor
main contactor faulty
2.4 Main On Fault
main contactor open
1. Main contactor failed to close
3.1
1. Misadjusted throttle pot
2. Throttle pot bad
3.2 Brake on fault
brake on fault
1. Electromagnetic brake open
2. Electromagnetic brake faulty
3.3 Precharge Fault
precharge fault
1. Low battery voltage
2. Keyswitch & throttle activated
3.4 brake Off fault
brake off fault
1. Electromagnetic brake open
2. Electromagnetic brake faulty
3.5 H.P.D
Throttle disabled fault 1.Throttle used before keyswitch
2. Throttle pot needs adjustment
4.1
HW Failsafe
current sense fault
1. Short in motor wiring
2. Controller failure
4.2
Current sense fault
motor voltage fault
1. Motor voltage incorrect
2. Short in motor or wiring
3. Controller failure
4.3 EEPROM fault
EEPROM failure
1. EEPROM Failure
4.4 Power section fault power section fault
1. EEPROM failure
2. Short in motor or wiring
3. Controller failure
