Overview of the cooling mode functions
ESIE02–01
2–32
Part 2 – Functional Description
3
1
2
4
5
2.5
Normal Outdoor Fan Control in Cooling Operation
Applicable units
R(Y)P71-250B
Purpose
The purpose of this normal outdoor fan control is to ensure a correct discharge pressure in function of
the outdoor air and indoor room temperature.
Method
The table below shows in which conditions the outdoor fan works at low or high speed.
Ta = ambient temperature = outdoor air temperature; Tr = room suction temperature.
Different fan
speeds
The table below explains the meaning of L, H and HH fan speed.
Used input
The normal outdoor fan control during cooling operation uses the following inputs:
Condition
Fan Speed
Ta < 41.7 - 0.84 x Tr
L
Ta > 45.7 - 0.84 x Tr
H
Fan operation
71
100 and 125
200 and 250
1 fan
Upper fan
(MF1)
Lower fan
(MF2)
Fan 1
Fan 2
OFF
OFF
OFF
OFF
OFF
OFF
L
L
L
L
H
OFF
H
H
H
H
H
H
HH
HH
HH
HH
H
H
Input
Connection on
indoor PCB
Connection on
outdoor PCB
Indoor room temperature R1T
X19A
—
Outdoor air temperature R1T
—
X4A
Summary of Contents for Sky Air R-407C
Page 1: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 2: ......
Page 3: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 4: ......
Page 16: ...Introduction ESIE02 01 xii 3 1 4 5...
Page 18: ...ESIE02 01 1 2 Part 1 System Outline 3 1 1 5...
Page 42: ...General Outline Outdoor Units ESIE02 01 1 26 Part 1 System Outline 3 1 1 4 5...
Page 49: ...ESIE02 01 General Outline Indoor Units Part 1 System Outline 1 33 3 1 4 5...
Page 72: ...General Outline Indoor Units ESIE02 01 1 56 Part 1 System Outline 3 1 1 4 5...
Page 86: ...Specifications ESIE02 01 1 70 Part 1 System Outline 3 1 1 4 5...
Page 110: ...ESIE02 01 1 94 Part 1 System Outline...
Page 130: ...Switch Box Layout ESIE02 01 1 114 Part 1 System Outline 3 1 1 4 5...
Page 180: ...PCB Layout ESIE02 01 1 164 Part 1 System Outline 3 1 1 4 5...
Page 182: ...ESIE02 01 2 2 Part 2 Functional Description 3 1 2 5...
Page 204: ...General Functionality ESIE02 01 2 24 Part 2 Functional Description 3 1 2 4 5...
Page 216: ...Overview of the cooling mode functions ESIE02 01 2 36 Part 2 Functional Description 3 1 2 4 5...
Page 232: ...ESIE02 01 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 294: ...Error Codes System Malfunctions ESIE02 01 3 64 Part 3 Troubleshooting 3 1 3 4 5...