INVENTOR O3MVO32-09 Service Manual

Troubleshooting
 Page 79 
5.7 E7 (Indoor PCB /Display board communication error)
Description: Indoor PCB does not receive feedback from Display board for 120 seconds.
Recommended parts to prepare:
• Wiring mistake
• Faulty PCB
• Display board malfunction
Troubleshooting and repair:
Power off,
then restart the unit
2 minutes later.
Is it still displaying
the error code?
Check the wirings and
connection.
YES
The unit is operating normally.
NO
Are all the
connections
good?
Correct the connection
or replace the Wirings.
NO
Replace the indoor main
PCB.
YES
Is the error
extinguished?
Replace the Display board.
NO

INVENTOR O3MVO32-09 Specifications

General

Brand	INVENTOR
Model	O3MVO32-09
Category	Air Conditioner
Language	English