Watlow MLS-PM, User Manual

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110 MLS User’s Guide
Troubleshooting
WARNING
A manual controller reset clears the MLS memory
and resets its parameters to their default values. If
you reset a stand-alone system, you cannot recover
your original parameters. If you have a computer
supervised system, ANASOFT stores a copy of
your parameters.
Do not attempt to repair the MLS yourself. There
are no user-repairable components in the MLS. If
the troubleshooting procedures in this chapter do
not solve your system's problems, you will need to
return the unit to ANAFAZE for testing and
repair, see Returning the Unit to ANAFAZE below.
Returning your Unit to ANAFAZE
If you need to return the MLS to ANAFAZE, please call ANAFAZE for
a Returned Materials Authorization (RMA) number. The RMA number
helps us track your equipment and return it to you as soon as possible.
Try to figure out if the problem is in the MLS-PM or the MLS-AIM, and
send only that part for repair.
Troubleshooting Stand-Alone Systems
The MLS is self contained, so there are very few things you can test if it
is not functioning properly. However, the MLS is only part of a control
system; check other parts of the system, like thermocouples, before you
assume that the unit is broken.
You may assume that there is a problem if:
•
The LEDs on the Analog Input Module (AIM) are not blinking.
• The MLS Processor Module's LCD screen is not lit.
• The LCD screen does not display graphics or characters.
The rest of this section describes common problems and solutions for
stand-alone systems.
MLS-PM Has No Power
If you supply power to the MLS-PM and the LCD screen does not light
up, check the power supply and its connections. Follow the instructions
in the Power Wiring and Controller Test section of the Installation
chapter.