Replace The Electronic Control Board- Kuhl; Replace The User Interface - Friedrich Kuhl KCS12B10A Service Manual

Replace the Electronic Control Board- Kuhl

1.
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Failure to do so could result in serious injury or
death.
Unplug the unit
2. Remove the Front Cover. Refer to Routine Maintenance, Figure 401.
3. Remove three (3) screws from Control Box Panel .
Remove
3 screws
4. If necessary, cut wire ties and remove one(1) screw from electronic
holder to create slack in wiring. Refer to figure 712.
5. Swap wires one for one from old control board to new control
board. If swapping wires one for one is not possible, identify and tag
wires. Refer to figure 713.
6 . Remove the four(4) circuit Board pins using needle nose pliers or
other suitable tool. Refer to figure 714.
7. If Jumper is installed on High pressure switch terminals, Swap
jumper from old control board to new control board.
8. Install the control board using four(4) new circuit board pins.
9. Install fish paper as insulation between control board and metal.
Secure with the circuit board pins.
10. Reinstall the control board panel, reinstall the screw in the
electronic holder, and secure wiring as required.
11. Install the Front Cover. ( Refer to Routine Maintenance, Figure 401.
74
COMPONENT TESTING
WARNING
Figure 712
Remove pins
4 places
12. Plug in the unit and test the unit for proper operation. Refer to
operation section.

Replace the User Interface

1. Unplug the Unit
Remove the Front Cover. Refer to Routine Maintenance, Figure 401.
2. Remove 2 –mounting screws securing UI and disconnect ribbon
cable.
3. Inspect ribbon cable for obvious signs of damage.
4. If ribbon cable is damaged, or damage is suspected, disconnect
cable from User Interface and Control Board.
5. Paying careful attention to the ribbon cable routing, remove the old
cable and replace with a new ribbon cable.
5. Connect ribbon cable to the power board and user interface as
required.
6. Install new UI using the 2-screws.
7. Plug in the unit and verify control operation. Refer to Operation
Section.
Figure 713
Figure 714