TP-6745 7/10 69Section 3 Controller Test and Replacement
3.16 Controller Replacement
Always check for open switches or circuit breakers,
loose connections, or faulty wiring before replacing any
parts. Replace the controller only if the troubleshooting
and test procedures in this manual indicate conclusively
that the controller is damaged or inoperative.
The controller contains two circuit boards, the logic
board and the power board, which can be replaced
individually. The entire controller and plastic housing
can also be obtained as a complete assembly. Save the
old controller’s plastic cover, which includes the transfer
switch nameplate, for use with the new controller.
3.16.1 Controller Configuration
(Settings)
New controllers are shipped with the factory default
settings for the system settings, including voltage,
frequency, number of phases, phase rotation, and other
user-adjustable settings. After installation, the system
parameters must be set for the application.
If the old controller is operable, it may be possible to
save the configuration file (MPAC1500_######.cfg) to
a USB storage device before removing the controller
from the transfer switch. The configuration file contains
the system parameter settings, including system setup,
source setup, time delays, input and output
assignments, and communications settings. The
configuration file can be loaded onto the new controller
after it is installed. See Section 3.14 for instructions to
download and upload files through the controller’s USB
port.
Note: Operation problems can be caused by incorrect
controller settings. Do not load the old
configuration file onto the new controller unless
you are certain that all the settings in the file are
correct.
If the configuration settings file is not available, use the
controller user interface to check and adjust the system
settings for the application. Refer to the transfer switch
operation and installation manual for instructions.
3.16.2 Circuit Board and Electronic
Component Handling
Improper removal, installation, transportation, storage,
or service can damage sensitive electronic
components. Observe the following guidelines to
prevent damage when working with circuit boards or
electronic components.
Circuit Board and Electronic Component Handling
D Keep circuit boards or electronic components inside
the antistatic, cushioned factory packaging until
installation.
D Store circuit boards or electronic components in a
clean environment away from moisture, vibration,
static electricity, corrosive chemicals, and solvents.
D Disconnect all power sources before removing or
installing circuit boards or electronic components.
D Wear an approved, grounded, antistatic wrist strap
when handling circuit boards or electronic
components.
D Carefully hold the circuit board by its edges and not by
any of its components or electrical contacts.
D Do not drop the circuit board or electronic
components.
D Do not bend the circuit board, electronic components,
or electronic component leads.
D Do not strike the circuit board or electronic
components using or against a hard object.
D Clean dusty or dirty circuit boards with a vacuum
cleaner or soft, dry brush.
D Never attempt circuit board repairs, adjustments, or
modifications other than replacing plug-in service
parts or performing manufacturer-approved
installation or service procedures.
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