Hot Start Control (In Heating Operation Only) - Daikin SkyAir RZQ-P Series Service Manual

Outline of Control (Indoor Unit)
6.6

Hot Start Control (In Heating Operation Only)

 FCQ, FHQ, FAQ
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 starting condition 1 or the starting condition 2 is established, the operations
shown below will be conducted.
34
Hot start starting conditions
• Starting condition1: Defrost ending or
OR oil return ending
• Starting condition 2: 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 detected with the gas thermistor
2
TC: High pressure equivalent saturated temperature
SiUS28-902_B
Hot start ending conditions
• lapse of 3 minutes
OR
• TH2 > 93˚F
• Tc > 126˚F
Normal control
Normal control
Function