Overview of the heating mode functions
ESIE02–01
2–38
Part 2 – Functional Description
3
1
2
4
5
3.2
Defrost Control
Applicable units
■
RY35-45E(A)Z7V1
■
RYP71-250B
Purpose
The purpose of the defrost control is to prevent frost on the outdoor heat exchanger coil. This frost
forms when the unit is in heating position.
Starting conditions:
RYP71-250B
The defrosting starts when either condition 1 or 2 has been realized.
Heating integral
capacity
The integral heating capacity is calculated by using the indoor unit data (R2T - R1T) divided by the
compressor running time.
Condition 1
Condition 2
The compressor has been running for a total of 25 min since the start of heating or since the end
of the previous defrosting.
■
Outdoor heat exchanger temp.
≤
-3˚C, and
■
Outdoor heat exchanger temp.
≤
0.4 x Ta - 5˚C
■
Compressor ON
≥
5 min continuously, and
integral heating capacity diminishes (see
further in this section), or
■
Ta > -5˚C for 3 h accumulated
(if DS1-2 is ON, 40 min;
if DS2-1 is ON, 24 h), or
■
Ta
≤
-5˚C for 6 h accumulated
Above condition for 10 min accumulated.
Outdoor fan is ON (not in overload control)
Outdoor fan is OFF (overload control)
-15
-10
-5
-5
-1
-3
-7
-9
0
5
Outdoor heat exchanger
temp. (Tc) (˚CDB)
Outside air
temp. (˚CDB)
Defrost activation range
Integral
capacity
Compr. ON time
Heating
Defrosting
Diminishing
integral capacity
Max. integral
capacity value
Содержание Sky Air R-407C
Страница 1: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Страница 2: ......
Страница 3: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Страница 4: ......
Страница 16: ...Introduction ESIE02 01 xii 3 1 4 5...
Страница 18: ...ESIE02 01 1 2 Part 1 System Outline 3 1 1 5...
Страница 42: ...General Outline Outdoor Units ESIE02 01 1 26 Part 1 System Outline 3 1 1 4 5...
Страница 49: ...ESIE02 01 General Outline Indoor Units Part 1 System Outline 1 33 3 1 4 5...
Страница 72: ...General Outline Indoor Units ESIE02 01 1 56 Part 1 System Outline 3 1 1 4 5...
Страница 86: ...Specifications ESIE02 01 1 70 Part 1 System Outline 3 1 1 4 5...
Страница 110: ...ESIE02 01 1 94 Part 1 System Outline...
Страница 130: ...Switch Box Layout ESIE02 01 1 114 Part 1 System Outline 3 1 1 4 5...
Страница 180: ...PCB Layout ESIE02 01 1 164 Part 1 System Outline 3 1 1 4 5...
Страница 182: ...ESIE02 01 2 2 Part 2 Functional Description 3 1 2 5...
Страница 204: ...General Functionality ESIE02 01 2 24 Part 2 Functional Description 3 1 2 4 5...
Страница 216: ...Overview of the cooling mode functions ESIE02 01 2 36 Part 2 Functional Description 3 1 2 4 5...
Страница 232: ...ESIE02 01 3 2 Part 3 Troubleshooting 3 1 3 5...
Страница 294: ...Error Codes System Malfunctions ESIE02 01 3 64 Part 3 Troubleshooting 3 1 3 4 5...