Troubleshooting/Service
310 UDC3500 Universal Digital Controller Product Manual 3/07
7.3 Power-up Tests
What happens at power-up
When power is applied, the controller will run three diagnostic tests – Memory (RAM),
Calibration and Configuration. After these tests are completed, “TEST DONE” is
displayed.
Failsafe Failures
If one or more of these tests fail, the controller will go to the Failsafe Manual Mode, and
“FAILSAFE” and one or more diagnostic messages will appear in the lower display. See
Section 7.5 – Background Tests and Diagnostic Messages for diagnostic procedures.
Position Proportional and Three Position Step test failures
If Auto-calibration has never been performed on a controller configured for Position
Proportional or Three Position Step Control with motor position indication, then the
diagnostic CAL MTR will appear on the lower display. Refer to
Section 6.5 – Position
Proportional and Three Position Step Output Calibration. This error message is cleared
once the slidewire input has been calibrated.
7.4 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 7-2 tells you how to display the results of the status tests.
Table 7-2 Procedure for Displaying the Status Test Results
Step Operation Press Result
1
Select STATUS
Set Up Group
Setup
Upper Display = READ
Lower Display = STATUS
2
Read the test
results
Func
Loop 1/2
You will see:
Upper Display = NO or YES YES indicates a failure
Lower Display = FAILSAFE
Func
Loop 1/2
Upper Display = PASS or FAIL
Lower Display = TEST
3
Cycle through all
STATUS Set Up
Group prompts
Func
Loop 1/2
Continue through the rest of the prompts until you see:
Upper Display = READ
Lower Display = STATUS
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