MULTI VRF-Ⅱ  INDOOR UNIT SERVICE MANUAL    EUROPEAN/LATIN AMETICA (R410A) 
60 
Factory setting 
recovery for user 
functions 
Select "01" and then press and 
hold the “ENTER/CANCEL” button 
to restore the factory settings for 
user functions (factory setting 
recovery fails if remote shielding is 
valid). 
Factory setting 
recovery for 
engineering 
settings 
Select "01" and then press and 
hold the “ENTER/CANCEL” button 
to restore the factory status for 
engineering settings (factory setting 
recovery fails if remote shielding is 
valid). 
Prevention for 
heat collection 
00: disabled 
10: 10 seconds 
20: 20 seconds 
30: 30 seconds 
40: 40 seconds 
50: 50 seconds 
60: 60 seconds 
It indicates the number of seconds 
for enabling the low-level fan every 
15 minutes. 
Project number 
settings of IDU 
Automatically 
generated upon 
the initial system 
operation 
In “P42” status, press the “MODE” 
button to enter the setting menu. 
The project number blinks in the 
timer area. Press “ ” or “ ” to 
adjust the project number. Press 
the “ENTER/CANCEL” button to 
confirm settings and return to the 
upper-level menu. 
One-key project 
number reset for 
IDU 
When it is set to "01", the wired 
controller initiates an IDU project 
number reset command. 
Minimum 
opening degree 
setting for 
heating 
breakdown of 
IDU expansion 
valves 
00: automatically 
controlled 
After the default minimum opening 
degree for heating breakdown is 
manually modified, the opening 
degree remains unchanged upon 
heating breakdown. 
Target outlet 
temperature 
setting for fresh-
air IDU in cooling 
mode 
Enter query in “P50” status and 
press “▲” or “▼” to set the target 
outlet temperature of fresh-air IDU. 
The default value is 18°C upon 
factory departure. 
Press the “ENTER/CANCEL” 
button to confirm settings and 
return to the upper-level menu. 
Display mode: 
Temperature area: displays the 
target outlet temperature of fresh-
air IDU. 
Target outlet 
temperature 
setting for fresh-
air IDU in heating 
mode 
Enter query in “P51” status and 
press “▲” or “▼” to set the target 
outlet temperature of fresh-air IDU. 
The default value is 22°C upon