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32
Curtis 1212S Manual,
Rev. B
7 — DIAGNOSTICS & TROUBLESHOOTING
7
DIAGNOSTICS AND TROUBLESHOOTING
The 1212S controller provides diagnostics information to assist technicians in
troubleshooting drive system problems. The diagnostics information can be
obtained in two ways: by reading the appropriate display on the 1313 handheld
programmer or the 1314 PC Programming Station, or by observing the fault
codes displayed by the Status LED.
PROGRAMMER DIAGNOSTICS
The programming devices present complete diagnostic information in plain
language. Faults are displayed in the Faults/Diagnostics menu, and the status
of the controller inputs/outputs is displayed in the Monitor menu.
Additionally, the fault history file in the Faults/Diagnostics menu provides
a list of the faults that have occurred since the file was last cleared. Checking
(and clearing) the fault history file is recommended each time the vehicle is
brought in for maintenance.
Refer to the troubleshooting chart (Table 2) for suggestions about possible
causes of the various faults
For information on programming devices, see Appendix D.
LED DIAGNOSTICS
During normal operation, with no faults present, the status LED is steadily
on. If the controller detects a fault, the status LED flashes a 2-digit fault iden-
tification code continuously until the fault is corrected.
For example, code “1,4”—undervoltage—appears as:
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
( 1 , 4 )
( 1 , 4 )
( 1 , 4 )
Refer to the troubleshooting chart (Table 2) for the fault codes, and for
suggestions about possible causes of the various faults.
Note: The Status LED can only indicate one fault at a time. If multiple
faults are detected, the highest priority fault code flashes until it is cleared.
FAULT HANDLING
When a fault is detected, the controller operates in a manner that is safe in the
presence of that fault. Depending on the severity of the fault, the response can
range from reduction of current to complete shutdown of drive.