Daikin VRV III Manual page 41

Features
Nighttime Free Cooling Operation
<Flow Chart>
Nighttime Free Cooling
Operating Condition
Air-conditioner Operation
<STOP>
Nighttime free cooling Operation
<ON>
Yes
Lapsed time setup
<2hr, 4hr, 6hr, 8hr>
No From air-conditioner stop time
>
<Lapsed time> <Setup time>
Yes
Fan operation & Temperature monitor
<5Min>
Yes
>
<Indoor temp.> <Preset temp.+2˚C>
Yes
>
<Indoor temp.> <Outdoor temp.>
Yes
Fan operation
<ON (H)or(U-H)tap>
6.8.3.2 Automatic Changeover to Efficient Operation Patterns
Operation automatically changes to the optimum pattern to suit conditions.
Cooling
Exhaust fan Damper
EA
OA
Air supply fan
36
Nighttime Free Cooling
Air-conditioner Operation
No
Temp. monitor operation time
<Indoor temp.>
<Indoor temp.>
No
Fan operation Lapsed time
No
<Lapsed time>
In between (bypass ventilation)
Heat exchanger element
(heat recovery)
RA
EA
Automatic
changeover
SA OA
DX-coil (cooling)
Precedent Condition
Yes
<RUN>
No
Yes
>
<Lapsed time> 60hr
No
Yes
<
<Preset temp.>
=
No
Yes
<
<Outdoor temp.>
=
No
Yes
>
60Min
No
EA
RA
Automatic
changeover
SA OA
: http://splitoff.ru/tehn-doc.html
ED34-862
Standard mode
Standby mode
<60 Min>
( Fan ON time is included )
Fan operation
<STOP>
Heating
Heat exchanger element
(heat recovery)
RA
SA
DX-coil (heating) Humidifying
General Information