Steps to troubleshoot the error Default COM MCB
Run a F97, If Default COM MCB is the ONLY MCB error, proceed to the steps below:
1. Power the meter off and grasp both clips at the top and bottom of the board and flip them to the
outward position. Grasp the board and slide it out toward you about a 1/2 inch.
2. Let the meter sit for 15-20 minutes, reseat the main board and power the meter on.
3. Now run a F80. This will re-initialize the peripherals for the MCB.
4. When you see the text displayed ‘initializing MCB if it says OK, the error will clear.