Noblift LPT22, Service Maintenance Manual

Page: 36 / 65

35
CURTIS 1230 CONTROLLER TROUBLESHOOTING CHART
LED
CODE
PROGRAMMER
LCD DISPLAY EXPLANATION POSSIBLE CAUSE
1. Incorrect encoder wiring.
Motor speed encoder
Motor speed encoder pulses
are not correct.
2. Controller defective.
1. Incorrect encoder wiring.
2. Motor blocked.
3. Insufficient braking torque.
4. Motor control P Gain and I Gain
settings too low.
1, 2
Motor Failsafe
Motor stalled, or motor turning
faster than desired.
5. Failsafe delay too short.
1. Incorrect motor wiring.
Motor Overcurrent Motor phase overcurrent.
2. Controller defective.
1. Incorrect motor wiring.
1, 3
Motor Output Fault
Motor output protection feature
has been triggered.
2. Controller defective.
1. Improper sequence of KSI,
interlock,and direction inputs.
2. Wrong SRO type selected.
3. Misadjusted throttle pot.
4. Direction switch open.
5. Sequencing delay too short.
1 ， 4 Static Return To Off SRO sequencing error.
6. Wrong throttle type selected.
1. Throttle input wire shorted to B+.
2. Defective throttle pot.
3. Wrong throttle type selected.
2
，
1
Throttle Wiper High
Throttle wiper voltage is too
high.
4. Incorrect speed limit pot wiring.
2
，
2 EMR Wiring Open
Emergency reverse wiring
fault.
1. Emerg. Rev. wire or check wire broken.
1. Improper sequence of KSI, interlock,
and throttle inputs.
2. Wrong HPD type selected.
3. Misadjusted throttle pot.
4. Interlock switch open.
5. Sequencing delay too short.
2
，
3 High Pedal Disable HPD sequencing error.
6. Wrong throttle type selected.
1. Throttle input wire shorted to B-.
2. Defective throttle pot.
2
，
4 Throttle Wiper Low
Throttle wiper voltage is too
low.
3. Wrong throttle type selected.
1. MUX card not plugged in.
2. MUX not wired properly.
3
，
1 Multiplexer Fault Tiller multiplexer error.
3. MUX card defective.
1. Main contactor coil open.
3
，
2 Main Contactor Missing or welded main
contactor.
2. Main contactor missing.