Daikin VRV RXYQ72-384XAYCA, Service Manual

Page: 198 / 419

Field Settings for Outdoor Unit SiUS342004EB
191 Part 5 Field Settings and Test Operation
Note(s)
The setting of [2-86] = 2 saves energy but may increase the time required to reach set point.
[2-82]: Heating comfort setting for VRT control
Default value: 1.
Value
[2-82]
Heating comfort setting
0 Eco
1 (default) Mild
2 Quick
3 Powerful
Change [2-82] to 0, 1, 2 or 3 in function of required limitation.
This setting is used in conjunction with setting [2-9].
When [2-82] is set to 0, the original refrigerant temperature target based on [2-9] is kept without
any correction, unless for protection control.
For more information and advice about the effect of these settings, refer to
Energy Saving and
Optimum Operation on page 201.
[2-86]: Optional setting to prioritize VRT control
Default value: 0.
Value
[2-86]
Level
0 (default) Prioritize largest demand
2 Prioritize smallest demand
[2-89]: Intermittent fan operation
Default value: 0.
Used for intermittent fan operation to assist snow discharge on outdoor fan.
Value
[2-89]
Intermittent fan operation
0 (default) OFF
1 30 minutes OFF, 1 minute ON with medium fan speed
2 30 minutes OFF, 1 minute ON with high fan speed
[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: It is possible to operate system without U4 error when some indoor
units are temporarily without power supply.
Field setting 2: It is possible to operate system with U4 warning when some indoor
units are temporarily without power supply.
Following conditions need to fulfil:

Maximum equivalent piping length of the farthest indoor less than 120 m (394 ft).

Index indoor units power simultaneously less than 30% of the nominal outdoor.

Total capacity is less than 30% of the nominal one of the outdoor unit.

Operation time is limited to 24 hours period.

It is recommended to shut down connected indoor units at the same floor.

Not possible to use service mode operation (e.g. recovery mode).

Backup operation has priority over this special feature.