SiME281906E
Outdoor Unit Control
Part 4 Functions and Control
62
4.13 Discharge Pipe Temperature Control
Outline
The compressor operating frequency will be controlled in order to avoid abnormal high
compressor temperatures (see also electronic expansion valve control).
Td: Discharge pipe temperature (°C)
Flowchart
Parameters
Normal operation
•&
OR
•&
OR
OR
Td >
B
°C
Compressor upper limit frequency
–1 step/20 seconds
Compressor upper limit frequency
+1 step/90 seconds
Compressor upper limit frequency
H
Hz
Compressor stop
Abnormal stop (
F3
indication)
10 times or less stopping in 200 minutes
Td
≤
B
°C
•Upper limit frequency:
Maximum frequency
•Td <
B
°C
•Td
≤
B
°C
•5 minutes elapsed
•Td
<
A
°C
•Td
≥
C
°C continues for
5 minutes
•300 seconds
•Td
≥
E
°C continues
for
G
minutes
•Td
≥
F
°C
Stopped 11 times
in 200 minutes
•&
•Td
>
D
°C
OR
•Td <
A
°C
RZF18/24AVMK
RZF30/36AVMK
A
(°C)
70
70
B
(°C)
105
105
C
(°C)
110
110
D
(°C)
115
115
E
(°C)
110
110
F
(°C)
118
120
G
(minutes)
15
15
H
(Hz)
97.5
108
