Starting Outdoor Fan Control In Heating Mode - Daikin Sky Air R-407C Service Manual

Overview of the heating mode functions
3.7

Starting Outdoor Fan Control in Heating Mode

1
Applicable units
Purpose
2
Method
3
4
5
Different fan
speeds
Used input
2–46
RYP71-250B
The purpose of the starting outdoor fan control is to control the fan speed in function of the indoor and
outdoor unit air temperature.
The illustration below shows the fan starting control in heating mode.
LPS is not detected for 3 min after start-up.
The starting fan speed lasts 5 min. When the outside temperature is 10˚C or lower, the fan speed
stays at H for the first 5 s if it is switched from OFF to L.
Outdoor unit air
temperature
OFF
9
H
4.5
-1
HH
The table below explains the meaning of L, H and HH fan speed.
71
Fan operation
1 fan
OFF OFF
L L
H H
HH HH
The outdoor fan starting control in heating mode uses the following inputs:
Input
Outdoor thermistor
Suction thermistor
OFF OFF
RYP71-125B: OFF OFF
RYP200-250B: L
H
H L
17 24
100 and 125
Upper fan Lower fan
(MF1) (MF2)
OFF OFF
L L
H H
HH HH
Connection on
indoor PCB
—
R1T
ESIE02–01
Indoor unit air
temperature
200 and 250
Fan 1 Fan 2
OFF OFF
H OFF
H H
H H
Connection on
outdoor PCB
R1T
—
Part 2 – Functional Description