TP-6461 1/08
75
Section 4 Controller Test and Replacement
4.14.3 Replacement Procedure
Before removing the old controller, refer to Section
4.14.1. It may be possible to download the system
settings from the controller to a file that can later be
loaded onto the new controller for more efficient system
setup.
Disconnect power to the transfer switch before starting
to disconnect the controller.
Observe the following
safety precautions to avoid injury or equipment damage.
Note:
Model KGS/KGP transfer switches use a different
power board than other models with MPAC 1500
controls. Refer to Parts Catalog TP-6433 for the
correct part numbers.
Hazardous voltage.
Will cause severe injury or death.
Disconnect all power sources before
opening the enclosure.
DANGER
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open 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.
Controller Replacement Procedure
1. Move the generator set master switch to the OFF
position.
2. Disconnect the generator set engine starting
battery, negative (--) lead first.
3. Disconnect power to the transfer switch by opening
switches or circuit breakers to the switch.
Remove the old controller.
4. Open the transfer switch enclosure.
5. Check the voltage at the source lugs to verify that
the power is off.
6. Disconnect the transfer switch harness at the P1
connector at the bottom of the controller.
See
Figure 4-5.
7. Disconnect the programmed-transition board, if
equipped, from the controller at connector P2.
8. Disconnect the controller ground wire at the ring
terminal on the enclosure door.
9. Disconnect the accessory module assembly at
connector P16 at the top of the controller, if
connected.
10. Remove the plastic cover from the old controller
and save it to install on the new controller
assembly.
Note:
The cover includes the transfer switch
nameplate, which must remain with the
transfer switch.
To remove the cover, depress the latch at the
bottom of the cover. Swing the cover open on its
hinges and lift it off.
11. Label and then disconnect any input and output
leads connected to terminal strip TB1 on the logic
board. See Figure 4-5.
12. Label
and
then
disconnect
the
RS-485
communication cable from terminal strip TB2 on
the logic board (if connected). See Figure 4-5.
13. Disconnect
any
other
communications
connections to the ethernet port or the USB port.
See Figure 4-5 for connector identification.
14. Disconnect the current sensing accessory at
connector P3, if equipped.
Содержание KGP
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