Daikin Aurora Series Service Manual page 147

SiUS341802E
[2-89]: Intermittent fan drive setting
To prevent snow accumulation on the fan grille, fan is turned on intermittently when outdoor air
temperature is low.
[2-90]: Indoor unit without power
U4 error generation.
In case an indoor unit needs maintenance or repair on the electric side, it is possible to keep the rest of
the VRV DX indoor units operating without power supply to some indoor unit(s).
Default value: 0 (not active)
Field setting 1: Possible to operate system when some indoor units are temporarily without power
supply. Follow the steps below when shutting off power to indoor unit:
Following conditions need to be fulfilled:
Maximum equivalent piping length of the farthest indoor less than 120 m (394 ft).
Total capacity of powered off indoor units is less than 30% of outdoor unit capacity.
Operation time is limited to 24 hours from when the indoor unit is powered off.
Do not change cooling/heating mode of the system while indoor unit is powered off.
Not possible to use service mode operation (e.g. recovery mode).
Backup operation has priority over this special feature.
Field Settings and Test Operation
Value Intermittent fan
[2-89] drive setting
0 OFF
1 ON
2 ON
3 ON
4 ON
5 ON
6 ON
7 ON
(1) Wait 15 minutes after changing setting to 1.
(2) Turn off indoor unit using remote controller and wait 10 minutes before shutting off power
to indoor unit.
If remote controller indicates "Defrost" mode, wait 10 minutes after the "defrost" indication
is cleared from the remote controller before shutting off power to indoor unit.
(3) After finishing maintenance, return power to indoor unit.
(4) Return setting to 0.
Field Setting from Outdoor Unit
Fan OFF time
Fan speed
(min)
—
Low
Medium
Low
Medium
Low
Medium
Low
Fan ON time
(min)
— —
30 1
30 1
15 1
15 1
5 1
5 1
— Always ON
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