B
TROUBLESHOOTING
en-135
Safety, Operation, & Maintenance Manual
Lithium
TROUBLESHOOTING
TROUBLE SHOOTING ________________________________________________
Problem Possible Cause/Items to Check Additional Items to Check
Key switch ON - No power
to LDU
48VDC Battery or 48VDC Buffer Battery not
connected or discharged.
Check battery connections and voltage.
No 12V power to LDU. Overcurrent protec-
tion device in PDU may be tripped. Check
for open connection or shorted wire to GND
for LDU 48V power.
Cycle power once corrected.
Key switch ON - No power
to MCU or RCU
Main Contactor not on due to circuit breaker
tripped.
Check to see if circuit breaker 4 is tripped.
Fault Code on LDU Review any fault codes and take appropriate
action.
Overcurrent protection device in LDU
tripped. Check for open connection or
shorted wire to battery for main contactor
coil power.
No Traction Movement Ensure Machine was started. Check LDU
Green Lightning Bolt for steady on.
If flashing initiate start sequence.
Fault Code on LDU Review any fault codes and take appropriate
action.
Traction Contactor is off. Check MCU LED #
8 should be on when contactor is on. If off
see next item.
Overcurrent protection device in MCU
tripped. Check for open connection or
shorted wire to battery for traction contactor
power.
Check if Seat Switch is functioning. Check
MCU LED #24 should be on when on seat
and off when off seat.
Check switch and harness connection.
No CAN communication. Check connections.
Parking Brake not releasing Manually release parking brake, then
remove release screws. Cycle power.
Overcurrent protection device in PDU
tripped. Check for open connection or
shorted wire to GND for throttle pedal power,
TCU logic power, and park brake power.
Cycle power once corrected.
Overcurrent protection device in MCU
tripped. Check for open connection or
shorted wire to battery for traction contactor
coil power.
To Next Page
Loading...
Need help?
General
