Background Tests - Honeywell UDC3300 Product Manual

7.5

Background Tests

Introduction
Background tests
Table 7-6 Background Tests
Lower
Display
EE FAIL
Unable to write to non-volatile memory.
Anytime you change a parameter and it is
not accepted, you will see EE FAIL.
FAILSAFE This error message shows whenever the
controller goes into a failsafe mode of
operation. This will happen if:
INP1FAIL Two consecutive failures of input 1
integration. i.e., cannot make analog to
digital conversion.
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The UDC3300 performs on-going 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 more than one simultaneous malfunction, only the one with
the highest priority will appear in the lower display. Table 7-6 lists these
background tests, the reason for their failure, and how to correct the
problem.
Reason for Failure
• RAM test failed
• Configuration test failed
• Calibration test failed
• Burnout configured for none
and the input failed.
UDC3300 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 what tests pass
or fail, then run through the STATUS codes a
second time to see if the error cleared. Correct
according to the recommendations given in Table
7-5.
1. Make sure the actuation is configured correctly.
See Section 3 — Configuration.
2. Make sure the input is correct.
3. Check for gross overranging.
4. Restore the factory calibration:
a. Disconnect the wiring from and place a jumper
across terminals 26 and 27. The controller
should read room temperature if it is configured
for a thermocouple input.
b. If it does not read room temperature, see
Section 3 – Configuration and change the
IN1TYP prompt in the INPUT 1 group to
another type of thermocouple.
c. After the change, press [FUNCTION] key, then
the [LOWER DISPLAY] key. The limit controller
should read the correct room temperature. If it
does not, the unit has an input failure.
d. Repeat step b. This time switch the IN1TYP
back to the originally selected thermocouple.
e. Repeat step c. The controller is restored with
factory calibration.
f. Remove the jumper and reconnect the
thermocouple.
5. Replace the cold junction assembly.
Table continued on next page
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