Eh 0B (Indoor Pcb / Display Board Communication Error Diagnosis And Solution) - MrCool DIY E Star Series Troubleshooting Manual

Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole. This picture and the value are only for reference, actual appearance
and value may vary
7.6

EH 0b (Indoor PCB / Display board communication error diagnosis and solution)

Description: Indoor PCB does not receive feedback from the display board.
Recommended parts to prepare:
• Communication wire
• Indoor PCB
• Display board
Troubleshooting and repair:
Power off, then restart the unit 2 minutes
later
Is it still displaying
the error code?
YES
Check the wirings and connections
Are all the connections
good ?
YES
Replace the indoor main PCB
Does the error still exist?
Replace the display board
Troubleshooting 26
The unit functions normally
NO
Ensure a proper connection
NO