GE DEH-40417 manual Board

ASTAT ®-IBP Plus Service Instructions

Protection Board Replacement

1.Remove the following components:

a.The cover, as described in steps 1–2 of Cover Removal and Replacement.

b.The Logic Board, as described in steps 2–3 of Logic Board Replacement.

c.The Power Supply Board, as described in steps 2– 5 of Power Supply Board Replacement.

2.Remove the six wire connectors from the Protection Board, as shown in Figure 11. Note the locations of these terminals for reassembly.

3.Disconnect the four leads from the two current transformers and the two leads from the thermostat connecting to the six-point Terminal Board, located at the top-right edge of the Protection Board. Label these leads to ensure that they are connected to the same terminals on the new Protection Board.

4.Loosen the four screws holding the Protection Board to the housing. Remove the Protection Board from the ASTAT-IBP.

5.Place the new Protection Board in position in the ASTAT-IBP and secure it with the four mounting screws to the housing.

6.Attach the four current transformer leads and the two thermostat leads to the six-point Terminal Board.

7.Attach the six push-on wire connectors to the Protection Board.

8.Reinstall the following components:

a.The Power Supply Board, as described in steps 6– 9 of Power Supply Board Replacement.

b.The Logic Board, as described in steps 4–5 of Logic Board Replacement.

c.The cover, as described in steps 3–4 of Cover Removal and Replacement.

Six-Point

Terminal Board

Protection Board

Wire Connectors

Mounting Screw

Figure 11. Removing the wire connectors from the Protection

Board.

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