Daikin VRV III RXYQ5-54PY1 Service Manual page 152

Si34-601A
(3) Thermostat OFF by discharge air temperature
<Cooling>
Target discharge air temp. Ts – Discharge air temp. T4
<Heating>
&
6.11.3 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
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
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
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
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.
Function
>5 degree continue for 5 minutes.
→
Thermostat stops for 1 minute.

Discharge air temp. T4 – Target discharge air temp. Ts >5 degree


EV opening is low limit
This control shall be disabled at test run both in cooling and heating. (The test run shall be
conducted first.)
→
Thermostat stops for 1 minute.
Outline of Control (Indoor Unit)
→
Thermostat ON

continue for 5

minutes

→
Thermostat ON
°
C or lower.
°
C or lower after the said timer
°
C or lower.
°
C or lower after the said timer
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