Wesley BC-620-4CA - Manual (Page 114)

110 Curtis 1234/36/38 Manual,
OS
11
8
8 — DIAGNOSTICS & TROUBLESHOOTING
DIAGNOSTICS AND TROUBLESHOOTING
These controllers detect a wide variety of faults or error conditions. Faults can
be detected by the operating system or by the VCL code. This section describes
the faults detected by the operating system.
Faults detected by VCL code (faults 51–67 in Table 5) cannot be defined
here as they will vary from application to application. Refer to the appropriate
OEM documentation for information on these faults.
DIAGNOSTICS
Diagnostics information can be obtained in either of two ways: (1) by reading
the display on a 1311 programmer or (2) by observing the fault codes issued
by the Status LEDs. See Table 4 for a summary of LED display formats.
The 1311 programmer will display all faults that are currently set as well
as a history of the faults that have been set since the history log was last cleared.
The 1311 displays the faults by name.
The pair of LEDs built into the controller (one red, one yellow) produce
flash codes displaying all the currently set faults in a repeating cycle. Each code
consists of two digits. The red LED flashes once to indicate that the first digit
of the code will follow; the yellow LED then flashes the appropriate number of
times for the first digit. The red LED flashes twice to indicate that the second
digit of the code will follow; the yellow LED flashes the appropriate number
of times for the second digit.
Example: Battery Undervoltage (code 23).
In the Fault menu of the 1311 programmer, the words
Undervoltage Cutback will be displayed; the real-time battery voltage
is displayed in the Monitor menu (“Keyswitch Voltage”).
The controller’s two LEDs will display this repeating pattern:
RED YELLOW RED YELLOW
✱
✲ ✲
✱ ✱
✲ ✲ ✲
(first digit) (2) (second digit) (3)
The numerical codes used by the yellow LED are listed in the troubleshooting
chart (Table 5), which also lists possible fault causes and describes the condi-
tions that set and clear each fault.