Table 7-5 Troubleshooting Power Failure Symptoms - Honeywell UDC2500 Product Manual

Troubleshooting/Service
Procedure #1
Table 7-5 explains how to troubleshoot power failure symptoms.

Table 7-5 Troubleshooting Power Failure Symptoms

Step
Check the AC line voltage.
1
2 Make sure the chassis plugs
into the rear of the case
properly.
3 Check the system for Brown-
outs, heavy load switching, etc.,
and conformance to installation
instructions.
Change Power board.
4
What to do
UDC2500 Universal Digital Limit ControllerProduct Manual
How to do it
Use a voltmeter to measure the AC voltage
across terminals L1 and L2 on the rear
terminal panel of the controller.
Check the earth ground connection.
Withdraw the chassis and visually inspect the
controller board and the inside of the case.
Refer to Section 2 - Installation.
Installation instructions supplied with new
board.
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