Honeywell UDC2500 manual Power-up Tests, Status Tests

Troubleshooting/Service

7.3 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.

Three Position Step test failures

For controller configured for Three Position Step Control with motor position indication and Auto-cal has never been done, the prompt CAL MTR will appear to suggest that the controller be calibrated.

7.4Status 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 7-2tells you how to display the results of the status tests.

Table 7-2 Procedure for Displaying the Status Test (Numeric Code 1200)

Results

Step	Operation	Press	Result
1	Select		Upper Display = READ
		Setup
	STATUS		Lower Display = STATUS
	Set Up Group
2	Read the test		You will see:
		Function
	results		Upper Display = NO or YES YES indicates a failure
			Lower Display = FAILSAFE

Function

Upper Display = PASS or FAIL Lower Display = TEST

4/07 UDC2500 Universal Digital Controller Product Manual 161