Graco LineDriver 25U670, Operation - Repair - Parts

Page: 27 / 40

Troubleshooting - Motor Controller
3A9034B 27
39
Main Contactor Did
Not Close
1. Main contactor did not
close.
2. Main contactor tips are
oxidized, burned, or not
making good contact.
3. External load on battery
pack (B+ connection
terminal) that prevents
battery pack from
charging.
4. Blown 300 amp fuse.
Set: With the main contactor
commanded closed, the battery
pack voltage (B+ connection
terminal) did not charge to B+.
Clear: Cycle Power Switch.
1. Inspect contactor cable and
connectors.
2. Inspect all cables and
connectors from batteries to
controller.
3. Inspect contactor contacts for
damage or corrosion and repair
or replace contactor.
4. Inspect 300 amp fuse and
replace if needed.
41 Throttle Open
1. Throttle wiper voltage
too high.
Set: Throttle wiper (pin 16)
voltage is higher than the high
fault threshold.
Clear: Bring throttle wiper voltage
below the fault threshold.
1. Inspect throttle cable insulation
and connectors for damage
and repair or replace where
needed.
2. Replace throttle assembly.
42 Throttle Short
1. Throttle wiper voltage
too low.
Set: Throttle wiper (pin 16)
voltage is lower than the low fault
threshold.
Clear: Bring throttle wiper voltage
above the fault threshold.
1. Inspect throttle cable and
connectors.
2. Replace throttle assembly.
47
HPD/Sequencing
Fault
1. Power Switch, seat, and
throttle inputs applied in
incorrect sequence.
2. Faulty wiring, crimps, or
switches at Power
Switch, seat, or throttle
inputs.
Set: HPD (High Pedal Disable) or
sequencing fault caused by
incorrect sequence of Power
Switch, seat, and throttle inputs.
Clear: Reapply inputs in correct
sequence (neutral throttle, power,
seat switch).
1. Cycle power with no pressure
on Speed Pedals.
2. If error persists, inspect throttle
and seat switch cables.
3. Recalibrate the accelerator
assembly. Refer to Accelerator
Calibration , page 17.
4. Replace throttle assembly.
73 Stall Detected
1. Stalled motor.
2. Motor encoder failure.
3. Bad crimps or faulty
wiring.
4. Problems with power
supply for the motor
encoder.
Set: No motor encoder movement
detected.
Clear: Cycle Power Switch.
1. Reduce load on driver so it can
move with applied throttle.
2. Inspect encoder/thermistor
cable. Verify motor wires U, V,
W are properly wired.
3. Replace motor.
4. Replace controller.
88
Encoder Pulse
Count Fault
1. Encoder Steps
parameter does not
match the actual motor
encoder.
Set: Detected wrong setting of
the Encoder Steps parameter.
Clear: Cycle Power Switch.
1. Inspect motor
encoder/thermistor cable.
2. Replace motor.
CODE DESCRIPTION POSSIBLE CAUSE SET / CLEAR CONDITIONS SOLUTION