Daikin VRV II RXYQ5MY1B Service Manual page 123

Outline of Control (Indoor Unit)
(3) Thermostat OFF by discharge air temperature
<Cooling>
Target discharge air temp. Ts – Discharge air temp. T4
<Heating>
&
6.5.3 Low Outdoor Air Temperature Protection Control
Objective
In cooling (or fan operation) or heating, if outdoor air is low in temperature, stop the fan forcibly.
Details
[Cooling and fan operation]
Turn OFF the fan for a period of 60 minutes at a suction temperature of 5 ºC or lower.
In order to monitor the outdoor air temperature, however, turn ON the fan for a period of one
minute and turn OFF the fan again at a temperature of 5 ºC or lower after the said timer
completes the operative period.
Reset the 60-minute timer when the fan stops running.
[Heating]
Turn OFF the fan for a period of 60 minutes at a suction temperature of –5 ºC or lower.
In order to monitor the outdoor air temperature, however, turn ON the fan for a period of one
minute and turn OFF the fan again at a temperature of –5 ºC or lower after the said timer
completes the operative period.
Reset the 60-minute timer when the fan stops running.
* The thermostat will not turn ON in one minute due to the temperature while the fan stops.
112
Discharge air temp. T4 – Target discharge air temp. Ts >5 degree
EV opening is low limit
→Thermostat stops for 1 minute.
This control shall be disabled at test run both in cooling and heating. (The test run shall be
conducted first.)
>5 degree continue for 5 minutes.
→Thermostat stops for 1 minute.
SiE39-404
continue for 5
minutes
Function