TP-6461 1/08
59
Section 4 Controller Test and Replacement
4.3.2
Controller Backup Battery
Hazardous voltage.
Will cause severe injury or death.
Disconnect all power sources before
opening the enclosure.
DANGER
Servicing the transfer switch. Hazardous voltage can
cause severe injury or death.
Deenergize all power sources
before servicing. Turn off the main circuit breakers of all
transfer switch power sources and disable all generator sets
as follows:
(1) Move all generator set master controller
switches to the OFF position. (2) Disconnect power to all
battery chargers. (3) Disconnect all battery cables, negative
(--) leads first.
Reconnect negative (--) leads last when
reconnecting the battery cables after servicing. Follow these
precautions to prevent the starting of generator sets by an
automatic transfer switch, remote start/stop switch, or engine
start command from a remote computer. Before servicing any
components inside the enclosure: (1) Remove all jewelry. (2)
Stand on a dry, approved electrically insulated mat. (3) Test
circuits with a voltmeter to verify that they are deenergized.
Note:
Disconnect power to the controller before
installing or replacing the battery.
The transfer switch controller uses a 4.1-volt backup
battery for power when no source is available. A Low
Backup Battery message on the screen indicates that
this battery needs to be replaced. See Figure 4-5 for the
battery location.
Note:
Do not use a standard AA battery; the voltage is
not correct and the specifications are not
adequate
for
this
equipment.
Obtain
replacement
battery
GM47057
from
the
manufacturer.
Note:
Do not use a metal tool to remove or install the
battery.
When installing the battery, follow the polarity (+/--)
markings on the circuit board.
Set the controller’s current time and date after installing
the battery.
See the transfer switch Operation and
Installation Manual for instructions.
4.3.3
Powering the Controller Directly
(Service Kit GM52407)
On occasion it is necessary to supply 120 VAC power
directly to the controller for testing.
Service Kit
GM52407 contains a cable with a transformer to supply
power to the controller from a 120 VAC wall outlet.
Disconnect the controller from the transfer switch.
Disconnect the I/O module assembly (if equipped) and
connect the cable to the controller’s P16 connector. See
Figure 4-6. The cable can also be connected to the I/O
module assembly, if desired. Plug the cable into a 120
VAC wall outlet to power the controller during testing.
Note:
Do not connect 120 VAC power to any other
location on the controller.
GM46733
1. Connect service kit power cable to controller connector P16
(I/O module connection)
1
Figure 4-6
Service Kit GM52407 Connection
(controller cover removed for illustration
only)
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