Hot Start Control (In Heating Operation Only) - Daikin VRV III REYQ8PY1B Service Manual

SiBE37-701
6.8

Hot Start Control (In Heating Operation Only)

At startup with thermostat ON or after the completion of defrosting in heating operation, the
indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity.
[Detail of operation]
When either the start condition 1 or the start condition 2 is established, the operations shown
below will be conducted.
Function
Defrost ending or oil return ending
or Thermostat ON
Hot start control
H/L remote
controller setting
LL
OFF
Remote controller
setting
Po (Horizontal)
Hot start in progress
The fan is not OFF before initiating the hot start: LL
The fan is OFF before initiating the hot start: OFF
TH : Temperature (°C) detected with the gas thermistor
2
TC : High pressure equivalent saturated temperature
Outline of Control (Indoor Unit)
Hot start ending conditions
·
lapse of 3 minutes
·
OR
[TH2]>34˚C
·
"Tc">52˚C
Normal control
Normal control
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