5.2 How to Power Up the Controller

Apply power

Diagnostic tests

When power is applied, the controller will run three diagnostic tests. All the displays will light and then the controller will go into automatic mode.

Table 5-1 lists the three diagnostic tests.

Table 5-1 Power Up Diagnostic Tests

Prompt on Lower Display

Condition

 

 

RAM TEST

Check RAM

 

 

CONFTEST

Check Non-volatile Memory

 

 

CAL TEST

Check Calibration

 

 

Test failures

Troubleshooting

If one or more of these tests fail, the controller will go to the Fail-safe Manual Mode, and “FAILSAFE” will flash in the lower display.

If the output type is Position Proportional, and AUTO-CAL has never been done, a prompt “CAL MTR” will appear suggesting that the controller be calibrated.

Refer to “STATUS TESTS” in Section 9 - Troubleshooting to identify and correct the problem.

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Honeywell UDC 3300 manual How to Power Up the Controller