Curtis 1238SE - Summary of LED Display Formats; Troubleshooting

11 — DIAGNOSTICS AND TROUBLESHOOTING
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017 Return to TOC
pg. 130
Summary of LED Display Formats
e two LEDs have four dierent display modes, indicating the type of information they are providing.
Table 5 Types of LED Display
Display Status
Neither LED illuminated Controller is not powered on; or vehicle has dead battery; or severe damage.
Yellow LED ashing Controller is operating normally.
Yellow and red LEDs both
on solid
Controller is in Flash program mode.
Red LED on solid Internal hardware fault detected by the Supervisor or Primary microprocessor.
Missing or corrupt software. Interrupting a software download may cause
corruption of the software. Cycle KSI to clear. Reload software or replace
controller if necessary.
Red LED and yellow LED
ashing alternately
Controller has detected a fault. 2-digit code ashed by yellow LED identifies the
specific fault; one or two ashes by red LED indicate whether rst or second code
digit will follow.
TROUBLESHOOTING
e troubleshooting chart, Table 6, provides the following information on all the controller faults:
• fault code
• fault name as displayed on the programmer’s LCD
• the eect of the fault
• possible causes of the fault
• fault set conditions
• fault clear conditions.
Whenever a fault is encountered and no wiring or vehicle fault can be found, shut o KSI and turn it
back on to see if the fault clears. If it does not, shut o KSI and remove the 35-pin connector. Check
the connector for corrosion or damage, clean it if necessary, and re-insert it.