Sinclair SDV 6 Service Manual page 65

8.1.4 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
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
62
Digital display
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
Automatic recovery
 The FAPU is faulty.
 The master IDU's main control board is damaged.
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
Note:
1. The error code can be queried after the FAPU is connected to the wired controller or the display
box.
A71/A73
No
cleared?
Yes
Fault clear ed
Display position (master IDU)
Panel, display box, and wired controller
Replace th e the main co ntr ol
boa rd o f th e master IDU