Background Tests; Table 7-3 Background Tests - Honeywell UDC2300 Product Manual

7.5

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 simultaneously malfunctions, the messages will appear in sequence in the
lower display. Table 7-3 lists these background tests, the reason for their failure, and how
to correct the problem.
Lower
Display
EEFAIL Unable to write to non-volatile
memory. Anytime you change a
parameter and it is not accepted, you
will see EE FAIL.
This error message shows whenever
FAILSF
the controller goes into a Failsafe
mode of operation. This will happen if:
Two consecutive failures of input 1
IN1FL
integration; i.e., cannot make analog to
digital conversion. This will happen if:
• PV low limit is > PV high limit
CNFERR
• SP low limit is > SP high limit
• Output low limit > Output high limit
1/01

Table 7-3 Background Tests

Reason for Failure
• RAM test failed
• Configuration test failed
• Calibration test failed
• Burnout configured for none
and the input failed.
• Upscale or Downscale burnout
is selected
• Input not configured correctly
UDC2300 Limit Controller Product Manual
How to Correct the Problem
1. Check the accuracy of the parameter and re-
enter.
2. Try to change something in configuration.
3. Run through STATUS tests to re-write to
EEPROM.
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.
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. Replace factory calibration. See Section 6.6.
1. Check the configuration for each item and
reconfigure if necessary.
Troubleshooting/Service
57