96th day of attachment

After charging a brand new battery overnight, the pump still unable to run on batteries. I believe that there may be a battery circuit must have been open circuit. Therefore, I used wires to reconnect the circuit and using a DMM to test the continuity of the circuit. However, I feared that might I do not have to ability to accomplish the repair before I left as I have been dealing with it for a month and so. After reconnecting the circuit with insulated wires, the circuit is able to run on batteries. However, Air-in-line indicator keeps lights up even when the water tubing in inserted to the pump. It may be the air-in-line detector is stained by the solution. I wiped with the alcohol pad and the air-in-line detector goes off once I inserted the tubing.

Initially, I thought I have finished one pump. Sadly, Error 2 appeared again. It seems like I am back to square one again. May be the microcomputer that was used for the rotation is faulty. There are so many possibilities that lead to the error 2. Therefore, I start checking the continuity of the circuit that controls the motor rotation.

I replaced with another display circuit board and found out that the IC4 is not the problem that caused it. Therefore, I have to find other resort to this problem instead of just changing the whole HIC board without knowing which part truly affects the HIC board that gave this problem.

Disconnecting the battery circuit to find out which component is affecting the error 2 as before reconnecting the battery circuit, the LED display did not indicate error 2.

In the late afternoon, I analyzed two devices, otoscope and pump control from alternating mattress pressure system, and they are functioning properly.