Honeywell UDC 2300, Product Manual

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Troubleshooting/Service
104 UDC2300 Controller Product Manual 12/00
10.3 Power-up Tests
What happens at power-up
When power is applied, the controller will run three diagnostic tests. After these tests are
completed, “TEST DONE” is displayed.
Test Failures
If one or more of these tests fail, the controller will go to the Failsafe Manual Mode, and
FAILSF will flash in the lower display and a message indicating which test failed will
appear in the lower display. Then, “DONE” will appear in the lower display.
3 position step test failures
For controller configured for 3 Position Step control with motor position indication and
Auto-cal has never been done, a prompt CAL MTR will appear suggesting that the
controller be calibrated. Refer to Subsection 9.4 - Three Position Step Output Calibration.
10.4 Status Tests
Introduction
When required, the results of these tests can be checked to determine the reason the
controller has gone to Failsafe.
How to check the status tests
The procedure in Table 10-2 tells you how to display the results of the status tests.
Table 10-2 Procedure for Displaying the Status Test (Numeric Code 1200)
Results
Step Operation Press Result
1 Select
STATUS
Set Up Group
SET UP
Upper Display = READ
Lower Display = STATUS (1200)
2 Read the test
results
FUNCTION
You will see:
Upper Display = NO ( 0 ) or YES ( 1 ) YES indicates a failure
Lower Display = FAILSF ( 1202)
FUNCTION
Upper Display = PASS ( 0 ) or FAIL ( 1 )
Lower Display = TEST (1203)