Curtis 1214-/15-/19-8 Manual 20
5 — DIAGNOSTICS & TROUBLESHOOTING
Table 1 TROUBLESHOOTING CHART
LED PROGRAMMER
CODE LCD DISPLAY
EXPLANATION POSSIBLE CAUSE
1,2
HW FAI LSAFE
hardware fail-safe error 1. Controller defective.
1,3
M- FAULT
M- output shorted 1. M- output shorted to ground.
2. Internal motor short to ground.
1,4
SRO
SRO fault 1. Improper sequence of KSI, brake, and
direction inputs.
2. Wrong SRO type selected.
3. Brake or direction switch circuit open.
4. Sequencing delay too short.
2,1
THROTTLE FAUL T 1
5kΩ–0 or wiper fault 1. Throttle input wire open.
2. Throttle input wire shorted to ground or B+.
3. Throttle pot defective.
4. Wrong throttle type selected.
2,2
BB WI R I NG CHECK
emerg. reverse wiring fault 1. BB wire open.
2. BB check wire open.
2,3
HPD
HPD sequencing fault 1. Improper seq. of KSI, brake, throttle inputs.
2. Wrong HPD type selected.
3. Misadjusted throttle pot.
4. Sequencing delay too short.
2,4
THROTTLE FAUL T 2
Pot Low broken or shorted 1. Pot Low wire open.
2. Pot Low wire shorted.
3. Wrong throttle type selected.
3,1
CONT DRVR OC
driver output overcurrent 1. Direction contactor coil shorted.
3,2
DIR CONT WELDED
welded direction contactor 1. Direction contactor stuck closed.
3,4
M I SS I NG CONTACTOR
missing contactor 1. Direction contactor coil open.
2. Direction contactor missing.
3. Wire to direction contactor open.
4,1
LOW BATTERY VOLTAGE
low battery voltage 1. Battery voltage <16 volts (24–36V models)
or <21 volts (36–48V models).
2. Corroded or loose battery terminal.
3. Loose controller terminal.
4,2
OVERVOL TAGE
overvoltage 1. Battery voltage >46 volts (24–36V models)
or >60 volts (36–48V models).
2. Vehicle operating with charger attached.
4,3
THERMAL CUTBACK
over-/under-temp. cutback 1. Temperature >85°C or <-25°C.
2. Excessive load on vehicle.
3. Improper mounting of controller.
4. Operation in extreme environments.
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