Service manual

Outdoor Unit Functional Concept ESIE05-03
2–56 Part 2 – Functional Description
3
1
2
4
5
Frequency
restriction in
cooling
Heating High outdoor ambient (overload conditions):
In heating overload conditions, the outdoor fan speed will be adapted to secure the differential
pressure between high and low pressure.
Only the fan speed will be adapted in heating overload conditions.
No adjustments to the compressor frequency will be made.
Normal control
Used indoor unit
Wall mounted indoor
Other than wall mounted
indoor
---
Upper limit
frequency
Lower limit
frequency
71
109Hz
169Hz
38Hz
100
112Hz
174Hz
41Hz
125/140
139Hz
Upper limit
frequency
Lower limit
frequency
71
109Hz
48Hz
100
112Hz
72Hz
125/140
Upper limit
frequency
Lower limit
frequency
71
109Hz
62Hz
100
112Hz
72Hz
125/140
139Hz
139Hz
Ta
≥ 21°C
Ta
≥ -7°C
Ta
≤ 20°C
Ta
≤ -8°C
Normal operation
Outdoor unit fan
–1 step/30 sec
Outdoor unit fan
+1 step/30 sec
•Hp-Lp < 0.39MPa
•Compression ratio
< 1.8 (RZQ71)
•Hp > 3.43MPa
OR
OR
•LP<0.05MP (RZQ71)
•LPS activates (RZQ100~140)
•&
•OR
•OR
•&
•&
•&
•HP < 2.75MPa
•Hp-Lp > 0.69MPa
•Compression ratio > 2.4 (RZQ71
)
•Hp-Lp > 1.08MPa
•Compression ratio > 3.2 (RZQ71
)
•Hp < 3.2MPa
•Outdoor unit fan = 8 step
•Hp-Lp > 0.59MPa
•Compression ratio > 2.2
(RZQ71)
•Hp < 3.33MPa
ESIE05-03.book Page 56 Wednesday, April 6, 2005 4:09 PM