LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 95)

85
Service Manual - NeoTherm 500
Removing and Replacing the Current User Interface
Fig. D7-1 - Current user interface
Tools and equipment required:
* Soft cloth (clean towel, etc.)
• Small Phillips-head screwdriver (size #1)
Procedure
1. Turn off power to the system. Use the main discon-
nect switch mounted above the front panel.
2. Place the soft cloth on top of the NT unit.
3. Pull the upper front panel outward. Grip the two
handles, and pull straight out. Once the panel is
free, handle it carefully, because the wires will still
be connected. Swing the panel up and place it, face
down, on the cloth.
Ribbon cable
connectors
X01 -
12-pin
X07 -
8-pin
4. Disconnect the two wiring connectors:
• 8-pin connector X07
• 12-pin connector X01
Each connector is held in place by a locking tab. To
release the connector, push the tab down.
5. Disconnect the two ribbon-cable connectors.
6. Remove the four Phillips-head screws and separate
the user interface board from the back of the front
control panel.
7. Below the circuit board you will see the button actua-
tor. This is a small soft plastic part that is part of the
button assembly. Be sure this part remains in the
position shown in the photo.
Fig. D7-2 - Removing the connectors
Fig. D7-3 - Placing the button actuator
D7