Curtis 1244 Manual, Rev. E
73
8— DIAGNOSTICS & TROUBLESHOOTING
Table 5 TROUBLESHOOTING CHART
LED PROGRAMMER FAULT
CODE LCD DISPLAY CATEGORY
EXPLANATION
POSSIBLE CAUSE
1,2 H W F A I L S A F E 1 - 2 - 3 1 self-test or watchdog fault 1. Controller defective.
M - S H O R T E D 1 internal M- short to B- 1. Controller defective.
F I E L D O P E N 1 field winding fault 1. Motor field wiring loose.
1,3 2. Motor field winding open.
A R M S E N S O R 1 armature current sensor fault 1. Controller defective.
F L D S E N S O R 1 field current sensor fault 1. Controller defective.
T H R O T T L E F A U L T 1 1 wiper signal out of range 1. rottle input wire open.
2,1
2. rottle input wire shorted to B+ or B-.
T H R O T T L E F A U L T 2 1 pot low fault 1. rottle pot defective.
2. Wrong throttle type selected.
2,2 S R O 3 SRO fault 1. Improper sequence of KSI, interlock, and
direction inputs.
2. Wrong SRO type selected.
3. Interlock or direction switch circuit open.
4. Sequencing delay too short.
2,3 H P D 3 HPD fault 1. Improper seq. of direction and throttle inputs.
2. Wrong HPD type selected.
3. Misadjusted throttle pot.
4. Sequencing delay too short.
5. HPD threshold set too low.
2,4 B B W I R I N G C H E C K 1 emergency reverse wiring fault 1. Emergency reverse wire open.
2. Emergency reverse check wire open.
3,1 C O N T D R V R O C 1 cont. driver output overcurrent 1. Contactor coil shorted.
3,2 M A I N C O N T W E L D E D 1 welded main contactor 1. Main contactor stuck closed.
2. Main contactor driver shorted.
3,3 P R EC H A R G E F A U L T 1 internal voltage too low at startup 1. Controller defective.
2. External short, or leakage path to B- on
external B+ connection.
M I S S I N G C O N T A C T O R 1 missing contactor 1. Any contactor coil open or not connected.
3,4
M A I N C O N T D N C 1 main contactor did not close 1. Main contactor missing or wire to coil open.
4,1 L O W B A T T E R Y V O L T A G E 2 low battery voltage 1. Battery voltage <undervoltage cutback limit.
2. Corroded battery terminal.
3. Loose battery or controller terminal.
4,2 O V E R V O L T A G E 2 overvoltage 1. Battery voltage >overvoltage shutdown limit.
2. Vehicle operating with charger attached.
3. Battery disconnected during regen braking.
4,3 T H E R M A L C U T B A C K 2 over-/under-temperature cutback 1. Temperature >85°C or < -25°C.
2. Excessive load on vehicle.
3. Improper mounting of controller.
4. Operation in extreme environments.
4,4 A N T I - T I E D O W N 3 Mode 2 or Mode 4 selected at 1. Mode switches shorted to B+.
startup 2. Mode switches “tied down” to select Mode 2
or Mode 4 permanently.
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