Honeywell UDC2300 - Background Tests

Troubleshooting/Service
12/00 UDC2300 Controller Product Manual 105
10.5 Background Tests
Introduction
The UDC2300 performs ongoing background tests to verify data and memory integrity.
If there is a malfunction, an error message will be displayed (blinking) in the lower
display.
In the case of simultaneous malfunctions, the messages will appear in sequence in the
lower display. Table 10-3 lists these background tests, the reason for their failure, and
how to correct the problem.
Table 10-3 Background Tests
Lower
Display
Reason for Failure How to Correct the Problem
E FAIL
Unable to write to non-volatile
memory. Anytime you change a
parameter and it is not accepted, you
will see E FAIL.
1. Check the accuracy of the parameter and re-
enter.
2. Try to change something in configuration.
3. Run through Read STATUS tests to re-write
to EEPROM.
FAILSF
This error message shows whenever
the controller goes into a failsafe mode
of operation. This will happen if:
• RAM test failed
• Configuration test failed
• Calibration test failed
• Burnout configured for none
and the input failed.
1. Run through STATUS check to determine the
reason for the failure.
2. Press the SET UP key until STATUS appears
in the lower display.
3. Press the FUNCTION key to see whether the
tests pass or fail, then run through the
STATUS codes a second time to see if the
error cleared.
IN1RNG
Input 1 out of range. The process input
is outside the range limits.
1. Make sure the range and actuation are
configured properly.
2. Check the input source.
3. Restore the factory calibration. (See
Subsection 8.8.)
4. Field calibrate. See Section 8 - Input
Calibration.
IN1_FL
Two consecutive failures of input 1
integration; i.e., cannot make analog to
digital conversion. This will happen if:
• Upscale or Downscale burnout
is selected
• Input not configured correctly
1. Make sure the actuation is configured
correctly. See Section 4 - Configuration.
2. Make sure the input is correct.
3. Check for gross over-ranging. Check S101
jumper position. See Figure 2-2 Jumper
Placements.
4. Restore factory calibration. See Subsection
8.8.
IN2RNG
Input 2 out of range. The remote input
is outside the range limits.
Same as IN1RNG above.