7 — DIAGNOSTIC AND TROUBLESHOOTING
Curtis Model 1351 – December 2018
pg. 114
7 — DIAGNOSTIC AND TROUBLESHOOTING
The controller has two status LEDs, one red and one yellow LED. The present status of the controller
can be ascertainable within seconds by observing the status LEDs. Each fault will flash a specific code.
THE DIAGNOSTICS PROCESS
Diagnostics information can be obtained in either of three ways: (1) by observing the fault codes
flashed by the controller’s status indicator, (2) by reading the indicated fault ( ) in the
Curtis Software
Suite
TM
Programmer app, or (3) the CAN Emergency Messages.
Table 22 specifies the condition and associated flash pattern for the 1351 System Controller LEDs.
Table 22 LED flash patterns
Condition
Red
Yellow
Pattern
OK
Off
Flashing at a 1.5 sec
cycle.
ON = 500 ms
Off = 1000 ms
Programming
ON
ON
Dead
ON
OFF
Error
Flash Code digit 1
250 ms ON
250 ms OFF
Flash Code digit 2
250 ms ON
250 ms OFF
Each code is followed by a
2-second pulse, and the next
code is started.
Invalid Software
Fast Flash
OFF
The Normal/OK state is shown by only on the yellow LED flashing a 1 at a 1.5 sec cycle rate.
Additionally, the On-time is lengthen to a full 500 ms, thus further differentiates it from any Error
flash code.
Programming is shown using two formats:
• Initiate Programming and End of Programming = Both LEDs ON 100%,
• While data is incoming = Red LED ON and Yellow LED fast flashing
Non-operation (dead) state is shown by the RED Led 100% on and the Yellow LED off.
Error Codes (faults) are shown on the Status LEDs using a sequence of flashes and pauses. The
technique used is a departure from the previous Curtis motor controller standard (e.g., E/SE
controllers). The 1351 uses a format where the Red LED flashes the upper Tens digit number and
the Yellow LED flashes the lower Ones digit number. The flash cycle is 500 ms with a 250 ms On time.
If there are multiple codes, they are flashed in succession with a 2-second pause between each. There
is an additional 2 seconds added to the last flash code in the list (4-second total pause) to denote the
last Error code has be flashed.
Examples: (Each block = 500 ms)
Normal/Ok/No errors
• On/Off cycle within each block = 100% (thus, the On time is 500 ms)