Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 78

Outline of Control (Indoor Unit)
When the indoor unit is a round flow or multi flow type, if the air outlet is set as dual-directional or tri-directional,
Note: the starting conditions will be changed as follows.
Liquid pipe temperature ≤ 1°C (33.8°F) (for total of 15 minutes)
or
Liquid pipe temperature ≤ 0°C (32°F) (for 1 minute continuously)
During freeze-up prevention operation, the airflow rate is fixed to LL.
(The cancelling conditions are same as the standard.)
Liquid pipe
temperature
(44.6˚F)
(32˚F)
OR
(44.6˚F)
(33.8˚F)
65
+7ºC
0ºC
1 min.
+7ºC
+1ºC
t1 t2
Freeze-up prevention control
Forced OFF by thermostat
Start
Freeze-up prevention control
Forced OFF by thermostat
t > 15
t3 t4
Start
10 min.
Normal operation
Cancel
10 min.
Normal operation
minutes
Cancel
Functions and Control
SiUS331604E