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Control Board Replacement Kits 24U934, 24U935, 24U936, and 24U937
Disconnect the Control Board
NOTE: The control board is inside the electronics
cover. To replace the control board, you must replace
the entire electronics cover.
1. Unplug the position sensor, encoder, temperature
sensor, and motor from the control board.
2. Remove the wires from the clip inside the housing.
3. Remove any tie straps that are present.
4. Set the electronics cover and control board aside.
NOTE: For advanced models, see Disconnect the
Power Barrier Board, page 48.
Install the New Control Board
1. Plug the position sensor, encoder, temperature
sensor, and motor into the new control board.
F
. 37: New Control Board
IG
2. Secure the loose wires into the clip inside the
housing.
NOTE: For advanced models, see Disconnect the
Power Barrier Board, page 48.
38
Reset the Dip Switch
To calibrate the unit, you must toggle a dip switch on
the control board. There are two dip switches located
on the upper control board to calibrate the unit. Reset
either dip switch by toggling it to the opposite state.
This signals the control board that a replacement part
has been installed. The next time the unit is powered, it
runs an automatic calibration sequence.
NOTE: If you are performing more than one repair
procedure, the dip switch only needs to be toggled into
the opposite state once.
F
. 38: Dip Switch
IG
Reinstall the Electronics Cover
Be sure that no wires are pinched between the
electronics cover and the motor housing. Pinched
wires may damage the control board and will impair
explosion-proof safety.
1. Reinstall the electronics cover onto the center
housing.
2. Using a 6 mm hex wrench, install the 12 bolts.
NOTE: Ensure that the lock washers are still in
place.
3. Torque the bolts to 15 ft-lb (20 N•m).
3A4801G
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