7 — DIAGNOSTICS AND TROUBLESHOOTING
pg. 37
Return to TOC 1212 & 1212P Manual - Sep 2019
7 — DIAGNOSTICS AND TROUBLESHOOTING
The 1212 and 1212P controllers provide diagnostics information to assist technicians in
troubleshooting drive system problems. e diagnostics information can be obtained in two ways:
by reading the appropriate display on the programmer or by observing the fault codes issued by the
status LED.
PROGRAMMER DIAGNOSTICS
e 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 le in the Faults/Diagnostics menu provides a list of the faults that have
occurred since the le 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 3) 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 ashes a 2-digit fault identification code continuously until the fault
is corrected.
For example, code “1,4”—undervoltage—appears as:
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
( 1 , 4 ) ( 1 , 4 ) ( 1 , 4 )
e fault codes are listed in Table 2. Refer to the troubleshooting chart (Table 3) for suggestions about
possible causes of the various faults.
Note: e status LED can only indicate one fault at a time. If multiple faults are detected, the highest
priority fault code ashes 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.
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