Instruction manual

3-4 / Service ControlWaveLP

Figure 3-3 - Left Side View of ControlWaveLP

3.1.3 Removal/Replacement of the CPU Board and Lithium Battery

1. Perform steps 1 through 3 of section 3.1.2 (see Figures 3-1 & 3-2).

2. Remove the pluggable I/O Terminal Blocks from the FMI/OB’s card edge connectors.

3. Remove the four screws (A) (corners of FMI/OB) and the two screws (B) (near the center

of the FMI/OB) that secure the FMI/OB Board to the Mounting Panel (see Figures 3-1,

3-2 and 3-3). Carefully remove the 3-board ControlWave-RTU assembly from the

Mounting Panel. Gather the six screws for reuse.

4. In an ESD safe area remove the four screws (B) (top of FMI/OB) that secure the FMI/OB

Board to the CPU Board (see Figure 3-1 & 3-2).

5. Carefully disconnect the CPU Board from the FMI/OB Board.

6. To replace the 3V Lithium battery, pry up the Battery Securing Tab on the Coin-cell

Battery Holder and then remove the battery using a pair of tweezers or needle-nose

pliers. Install the replacement battery. Note: This step will not be required until units

have been in operation for an extended period of time (normally many years) as the

battery life is approximately 4000 hours of service. (Power is only drawn from the battery

when the unit looses power).

7. To replace the CPU Board follow steps 1 through 6 in reverse order, replacing rather

than removing the item in question.

3.1.4 Removal/Replacement of the FMI/OB Board