TOMCAR TM37E - Page 98

98
Troubleshooting
MAINTENANCE
CODE
Fault name & Effect of Fault
Possible cause
Set/Clear Conditions
17
Severe B+ Under Voltage
Reduced drive torque
1. Traction battery depleted
below authorized SOC.
2. Main contactor did not close.
Check SOC on spyglass display.
Cycle KSI
17
Severe KSI under Voltage
Motor current may switch off
and reset may occur.
1. Low power circuit power
source is below 8.4 volts.
2. Blown Fuse
Check auxiliary battery voltage
and bring above 10 volts.
Check fuse 11 in traction battery
fuse panel.
18+57
Severe B+ Over Voltage
Shutdown Motor;
Shutdown Main Contactor;
Shutdown Throttle;
Full Brake;
1. Battery charger fault. Battery
was charged to excessive
voltage.
2. Battery disconnected while
regen braking.
Cycle KSI
18
Severe KSI Over Voltage
Shutdown Motor;
Shutdown Main Contactor;
Shutdown Throttle;
Full Brake;
1. Auxiliary battery voltage too
high.
2. Auxiliary battery polarity is
reversed.
Check auxiliary voltage battery
voltage and polarity.
22
Controller Over Temp Cutback
Reduced drive and brake torque
1. Controller is operating in an
extreme environment.
2. Excessive load on vehicle
Bring controller temperature
below 85
o
C.
23
B+ Under Voltage Cutback
Reduced drive torque
Batteries need recharging
Recharge the traction battery