© Jan 2022 6-34 0607SE Maintenance Manual
REPAIR
Code Problem Action Limit Solution
connections and tight or clean. Check the voltage
to the ECU and PCU.
69
High Neutral Current
Fault (Zapi Only)
Disable Lifting and Driving
High Neutral Current: The MC is sensing current in
the motors when there should not be. This could
occur anytime the MC thinks the brakes are on
and the motors are still turning. This message
sometimes comes just before other faults but
should be ignored in those cases.
70
Steer Input Out of
Range (Zapi Only)
Disable Lifting and Driving
Steering Input Out of Range: There is an
inappropriate voltage at the steering input of the
ZAPI motor controller. The ZAPI may need to be
“trained” for the three steering voltages (on
Differential Steered machines). Or the steering
voltage from the ECU was at some point outside of
the range that was recorded during the “training”
session. Re-train the ZAPI and/or check for
fluctuating voltages due to lose wires, etc.
71
Motor Controller Main
Contactor Fault
Disable Lifting and Driving
Motor Controller Main Contactor Fault: Check the
connections to the main contactor. Replace the
contactor if necessary. Replace the Motor
Controller if necessary.
72
Motor Controller Over
Voltage Fault
Disable Lifting and Driving
Motor Controller Over Voltage Fault. Check battery
voltage and make sure the battery charger is not
on. Then cycle power to the lift. If that does not
resolve the issue, try replacing the Motor
Controller.
73
Motor Controller
Thermal Cutback
Fault
Disable All Motion
Motor Controller Thermal Cutback Fault: Drive or
Lift Motor may be overheating. Let the lift cool
down. If that does not help, cycle power to reset
the Motor controller. If that doesn’t resolve the
issue, replace the Motor Controller.
74
Motor Controller Over
Heat Fault
Disable All Motion
Motor Controller Motor Fault: Check connections
to the motors. Cycle power to the lift and if that
does not resolve the issue, replace the Motor
Controller.
75
Motor Controller
Pump Motor Fault
Disable All Motion
Motor Controller Pump Motor Fault: Check
connections to the Pump Motor. Cycle power to
the lift and if that does not resolve the issue,
replace the Motor Controller.
76
Motor Controller Left
Drive Motor Fault
Disable All Motion
Motor Controller Left Drive Motor Fault: Check
connections to the motors. Cycle power to the lift
and if that does not resolve the issue, replace the
Motor Controller.
77
Motor Controller Right
Drive Motor Fault
Disable Lifting and Driving
Motor Controller Right Drive Motor Fault: Check
connections to the motors. Cycle power to the lift
and if that does not resolve the issue, replace the
Motor Controller.
78
Pump Motor Short
Fault
Disable Lifting and Driving
Pump Motor Short Fault: Check connections to the
pump motor. Cycle power to the lift and if that does
not resolve the issue, replace the Motor Controller.
79
Left Drive Motor Short
Fault
Disable All Motion
Left Drive Motor Short Fault: Check the Motor
connections and make sure they are tight. Check
the Motor for a short.
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