Midea V8 VRF Series Service Manual page 46

6.1.4 A71 - The error of the linked FAPU is transmitted to the master IDU (series setting)
Note:
1) The type of FAPU may be HRV, VRF fresh air IDU and so on.
2) Series setting: The air supply side of the linked FAPU is directly connected to the air return side of the master IDU thro ugh an air
duct. A wired controller is used to set this installation method as a series connection.
Error display
The master IDU and the linked FAPU: stop. Other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
Error trigger
The error of the linked FAPU is transmitted to the master IDU
Error recovery Automatic recovery

Possible cause

Troubleshooting
Note:
1. The error code can be queried after the FAPU is connected to the wired controller or the display
box.
Digital display
The FAPU is faulty.
The master IDU's main control board is damaged.
A71/A73
Obtain the linked error code (1)
of the FAPU, and refer to the
correspon ding error han dling
method in the maintena nce
manua l of the FAPU for
trouble sho otin g
Erro r in FAPU
Afte r troub leshooting, is the
master IDU error code
cleared?
Yes
Fault clear ed
V8 VRF Indoor Units
Display position (master IDU)
Panel, display box, and wired controller
No
Replace th e the main co ntr ol
boa rd o f th e master IDU
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