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 through an air
duct. A wired controller is used to set this installation method as a series connection.
Display position (master IDU)
Panel, display box, and wired controller
The master IDU and the linked FAPU: stop. Other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
The error of the linked FAPU is transmitted to the master IDU
The FAPU is faulty.
The master IDU's main control board is damaged.
A71/A73
Error in FAPU
After troubleshooting, is the
master IDU error code
cleared?
Replace the the main control
board of the master IDU
Fault cleared
Yes
No
Obtain the linked error code (1)
of the FAPU, and refer to the
corresponding error handling
method in the maintenance
manual of the FAPU for
troubleshooting
Note:
1. The error code can be queried after the FAPU is connected to the wired controller or the display
box.
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