P71 Main Control Board Eeprom Fault - Midea V8 VRF Series Service Manual

6.1.39 P71 - Main control board EEPROM fault
Error display
The faulty IDU stops. Other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
When the master chip cannot receive data from EEPROM (EEPROM: a non-volatile memory whose
Error trigger
data are kept even when powered off)
Error recovery
Automatic recovery

Possible cause

Troubleshooting
Digital display
The IDU main control board is damaged.
External interference (such as noise and electromagnetic)
Power off and then
power on the IDU
Is the fault cleared?
Yes
The main control board
of IDU is normal and
subject to external
interference (such as
noise and
electromagnetic)
Panel, display box, and wired controller
P71
No
V8 VRF Indoor Units
Display position
Replace the main control
board of the IDU
87