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Instructions to Replace Fuse in Califia Patient Module (CPM) Electronic Board
BACKGROUND:
Use these instructions to replace a blown fuse in the electronic board inside the Califia Patient Module (CPM).
PREPARATION:
- Drain the reservoir in its entirety
- Power off the unit
- Disconnect all external tubing
- Disconnect power cable and Ethernet cable
- Move the Califia Patient Module (CPM) to a table or benchtop with plenty of workspace
REQUIRED TOOLS:
- 2mm hex driver
![](https://kb.biomedsimulation.com/wp-content/uploads/2023/10/image-1.jpeg)
- Small flat-blade screwdriver
![](https://kb.biomedsimulation.com/wp-content/uploads/2023/10/image-4.png)
STEPS TO REPLACE BLOWN FUSE:
- Use a 2 mm allen key or hex driver to remove the top panel screws, Figure 1, total of 14 screws.
![](https://kb.biomedsimulation.com/wp-content/uploads/2023/10/image-2.png)
Figure 1. Califia Patient Module (CPM)
- Find a small plastic Ziploc bag taped to the interior side wall of the CPM. It should include the following fuses: 2x 1.5A and 2x 5A fuses.
- Identify embedded computer board, Figure 2.
![](https://kb.biomedsimulation.com/wp-content/uploads/2023/10/image-3.png)
Figure 2. CPM with the top removed and Embedded Computer labeled
- Apply power to CPM and turn the power switch ON. Look for the red LED (light), Figure 3. The blown fuse would be above the red light.
![](https://kb.biomedsimulation.com/wp-content/uploads/2023/10/image-2-768x1024.jpeg)
Figure 3. CPM board with blown fuse identified
Power OFF CPM and disconnect from power.
- Pop blown fuse out from holder using flat blade screwdriver. Wedge screwdriver between spring-loaded top terminal then gently pry fuse out of socket.
- Identify replacement fuse. For instance, if the blown fuse is 5A, then make sure to replace it with the same size.
- Insert a new fuse into the cradle and gently secure using your finger.
- Apply power to CPM and power ON. Check all fuse lights are back to white.
- Replace CPM top.