Curtis 1253 - LED Diagnostics; Table 6 STATUS LED FAULT CODES

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Curtis 1253 Manual, Rev. F
5 — DIAGNOSTICS & TROUBLESHOOTING
LED DIAGNOSTICS
e 1253 controller has a Status LED output that can be used to drive an ex-
ternal LED. is 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 ashes steadily on and o.
If the controller detects a fault, a 2-digit fault identification code is ashed
continuously until the fault is corrected. For example, code “3,2”—welded main
contactor—appears as:
¤¤¤ ¤¤ ¤¤¤ ¤¤ ¤¤¤ ¤¤
( 3 , 2 ) ( 3 , 2 ) ( 3 , 2 )
e codes are listed in Table 6.
Table 6 STATUS LED FAULT CODES
LED CODES EXPLANATION
LED o no power or defective controller
solid on controller or microprocessor fault
0,1
■
¤ controller operational; no known faults
1,1 ¤ ¤ EEPROM fault
1,2 ¤ ¤¤ hardware failsafe fault
1,3 ¤ ¤¤¤ motor shorted
1,4 ¤ ¤¤¤¤ [not used]
2,1 ¤¤ ¤ undervoltage
2,2 ¤¤ ¤¤ lift lockout
2,3 ¤¤ ¤¤¤ sequence error (startup lockout)
2,4 ¤¤ ¤¤¤¤ throttle fault
3,1 ¤¤¤ ¤ main contactor coil shorted
3,2 ¤¤¤ ¤¤ welded main contactor
3,3 ¤¤¤ ¤¤¤ precharge fault
3,4 ¤¤¤ ¤¤¤¤ main contactor missing or did not close
4,1 ¤¤¤¤ ¤ low battery voltage
4,2 ¤¤¤¤ ¤¤ overvoltage
4,3 ¤¤¤¤ ¤¤¤ thermal cutback, due to over/under temp
4,4 ¤¤¤¤ ¤¤¤¤ [not used]
Note: Only one fault is indicated at a time, and faults are not queued up. Refer
to the troubleshooting chart (Table 5) for suggestions about possible causes of
the various faults.