Watlow Series D8 - Manual (Page 176)

Chapter 7: Troubleshooting and Reconfiguring Series D8 User’s Guide
158 Watlow Anafaze Doc. 0600-3120-2000
CAUTION! Before trying to troubleshoot a problem by
replacing your controller with another one,
first check the installation. If you have short-
ed sensor inputs to high voltage lines or a
transformer is shorted out, and you replace
the controller, you will risk damage to the
new controller.
If you are certain the installation is correct, you can try replac-
ing the controller. If the second unit works correctly, then the
problem is specific to the controller you replaced.
Returning a Unit
Before returning a controller, contact your supplier or call
Watlow (see page 1) for technical support.
Controllers purchased as part of a piece of equipment must be
serviced or returned through the equipment manufacturer.
Equipment manufacturers and authorized distributors should
call customer service at Watlow to obtain a return materials
authorization (RMA) number. Shipments without an RMA
will not be accepted. Other users should contact their suppli-
ers for instructions on returning products for repair.
Troubleshooting the Controller
A problem may be indicated by one or more of several types
of symptoms:
•
A process alarm
• A failed sensor alarm
• A system alarm
• Unexpected or undesired behavior
The following sections list symptoms in each of these catego-
ries and suggest possible causes and corrective actions.