MrCool DIY E Star Series Installation & Owner's Manual page 50

10.6 Error Code: EH 0b (Indoor PCB / Display board communication error diagnosis and solution)
Derscription: 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
Check the wirings and connections
Replace the indoor main PCB.
The error codes and descriptions are for reference only. If your system displays any of
these codes contact a qualified technician to investigate the matter further.
Page 49
2 minutes later.
Is it still displaying the
error code?
YES
Are all the
connections
good?
YES
Does the error
still exist?
Replace the display board.
****Disclaimer****
The unit functions normally.
NO
NO Ensure a proper connection.
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