Specifications

26
Curtis 1204M/1205M/1209M/1221M Manual
5
5 — DIAGNOSTICS & TROUBLESHOOTING
DIAGNOSTICS AND TROUBLESHOOTING
The 1204M/05M/09M/21M controllers detect a wide variety of faults or error
conditions. Fault information can be obtained in either of two ways: (1) by
observing the fault codes issued by the external Status LEDs or (2) by reading
the display on a programmer. Because the programmer uses the same connector
as the Status LED, only one of these ways can be used at any given time.
LED DIAGNOSTICS
During normal operation, with no faults present, the Status LED flashes steadily.
If the controller detects a fault, a 2-digit fault code is flashed until the fault is
corrected. For example, code “2,3”—HPD—appears as:
¤¤ ¤¤¤ ¤¤ ¤¤¤ ¤¤ ¤¤¤
( 2 , 3 ) ( 2 , 3 ) ( 2 , 3 )
Table 4 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 known faults
1,1
¤ ¤
EEPROM fault
1,2
¤ ¤¤
MOSFET short fault
1,3
¤ ¤¤¤
[not used]
1,4
¤ ¤¤¤¤
wiring fault
2,1
¤¤ ¤
under voltage cutoff
2,2
¤¤ ¤¤
[not used]
2,3
¤¤ ¤¤¤
HPD sequencing error
2,4
¤¤ ¤¤¤¤
throttle fault
3,1
¤¤¤ ¤
main contactor coil short / driver fault
3,2
¤¤¤ ¤¤
main contactor weld fault
3,3
¤¤¤ ¤¤¤
main contactor driver fault
3,4
¤¤¤ ¤¤¤¤
main contactor DNC (missing or open)
4,1
¤¤¤¤ ¤
under voltage cutback, low battery voltage
4,2
¤¤¤¤ ¤¤
over voltage
4,3
¤¤¤¤ ¤¤¤
thermal cutback, due to over/under temperature
4,4
¤¤¤¤ ¤¤¤¤
over temperature cutoff, due to severe
overtemperature(>110°C)
Note: Only one fault is indicated at a time. Faults are not queued up.
The numerical codes are listed in the troubleshooting chart (Table 5), which
also lists effects, clear conditions, and possible causes for each fault.