Curtis 1243GEN2 Manual
74
7 — DIAGNOSTICS & TROUBLESHOOTING
STATUS LED DIAGNOSTICS
A Status LED is built into the 1243GEN2 controller. It is visible through a
window in the label on top of the controller. This Status LED displays fault
codes when there is a problem with the controller or with the inputs to the
controller. During normal operation, with no faults present, the Status LED
flashes steadily on and off. If the controller detects a fault, a 2-digit fault
identification code is flashed continuously until the fault is corrected. For
example, code “3,2”—main contactor welded—appears as:
¤¤¤ ¤¤ ¤¤¤ ¤¤ ¤¤¤ ¤¤
( 3 , 2 ) ( 3 , 2 ) ( 3 , 2 )
The codes are listed in Table 8.
Table 8 STATUS LED FAULT CODES
LED CODES EXPLANATION
LED off no power or defective controller
solid on controller or microprocessor fault
0,1
■
¤ controller operational; no faults
1,1 ¤ ¤ current sensor error
1,2 ¤ ¤¤ hardware failsafe fault
1,3 ¤ ¤¤¤ M- fault or motor output short
1,4 ¤ ¤¤¤¤ static return to off (SRO)
2,1 ¤¤ ¤ throttle wiper high
2,2 ¤¤ ¤¤ emergency reverse circuit check fault
2,3 ¤¤ ¤¤¤ high pedal disable (HPD), or expired timer
2,4 ¤¤ ¤¤¤¤ throttle wiper low
3,1 ¤¤¤ ¤ contactor driver overcurrent or field winding short
3,2 ¤¤¤ ¤¤ main contactor welded
3,3 ¤¤¤ ¤¤¤ field winding open
3,4 ¤¤¤ ¤¤¤¤ missing contactor
4,1 ¤¤¤¤ ¤ low battery voltage
4,2 ¤¤¤¤ ¤¤ overvoltage
4,3 ¤¤¤¤ ¤¤¤ thermal cutback, due to over/under temp
4,4 ¤¤¤¤ ¤¤¤¤ anti-tiedown fault, or overheated motor
Note: Only one fault is indicated at a time, and faults are not queued up. Refer
to the troubleshooting chart (Table 7) for suggestions about possible causes of
the various faults. Operational faults—such as a fault in SRO sequencing—are
cleared by cycling the interlock switch or keyswitch.
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