Taco Electronic Solutions iWorx MPU2, Installation Manual

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iWorx® MPU2/MPU3
26 502-009, Effective: April 17, 2013
© 2013 Taco Electronic Solutions, Inc.
TROUBLESHOOTING TIPS
This section provides remedies for common problems.
Getting Help
Components within an iWorx® controller, sensor, or power supply cannot be field repaired. If there is a problem with a unit,
follow the steps below before contacting your local TES representative or TES technical service.
1.Make sure controllers, sensors, and power supplies are connected and communicating to desired devices.
2.Record precise hardware setup indicating the following:
Version numbers of application software.
Device and/or firmware version number.
A complete description of difficulties encountered.
APPLICABLE DOCUMENTATION
Problem Solution
Controller is not running and Status LED is not
illuminated. No power to controller. Verify the voltage on the controller’s
power connector (24 VAC).
How do I reset the controller? The controller can be reset by the LCI, or you can cycle power
to the controller. Refer to the LCI documentation for more infor-
mation on resetting the controller using the LCI.
Can my iWorx® system contain multiple MPU
controllers? Yes, provided that you do not exceed the maximum number of
controllers that can be handled by the Local Control Interface
(LCI).
Can I reverse the minimum and maximum val-
ues for the bypass damper? Yes. This will result in reverse damper action.
Can I use the bypass damper outputs to control
a VFD instead? Yes.
Thermistor readings fluctuate rapidly, some-
times by several degrees. The controller is not properly grounded. The controller’s ground
(GND) pin (T40) must be connected to earth ground.
Description Audience Purpose
iWorx® MPU Application
Guide
, Document No. 505-009
– Application Engineers
– Wholesalers
– Contractors
– Start-up Technicians
– End user Provides instructions for setting up and using the iWorx®
MPU.
iWorx® LCI2 Application
Guide
, Document No. 505-002
iWorx® LCI3 Application
Guide
, Document No. 505-050
– Application Engineers
– Installers
– Service Personnel
– Start-up Technicians
– End user Provides instructions for setting up and using the iWorx® Local
Control Interface.