Daikin RZQ140B7W1B [134/326] Discharge pipe temperature control

Daikin RZQ140B7W1B [134/326] Discharge pipe temperature control
Outdoor Unit Functional Concept ESIE05-03
2–50 Part 2 Functional Description
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3.3.5 Discharge Pipe Temperature Control
Outline The compressor operating frequency will be controlled in order to avoid abnormal high compressor
temperatures (see also expansion valve control).
Flow chart
Parameters
Td = Discharge pipe temperature
Normal operation
•&
OR
•&
OR
OR
Td > B°C
Compressor upper limit frequency
–1 step/20 sec
Compressor upper limit frequency
+1 step/1 min
Compressor upper limit frequency
79 Hz (RZQ71)
58 Hz (RZQ100~140)
Compressor stop
Malfunction 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 min elapsed
•Td
< A°C
•Td
C°C
300 sec
•Td
E°C continues
for G minutes
•Td
F°C
Stopped 11 times
in 200 minutes
•&
•Td
> D°C
OR
•Td < A°C
RZQ71B RZQ100~140B
A°C 100°C 100°C
B°C 105°C 105°C
C°C 110°C 110°C
D°C 120°C 120°C
E°C 110°C 115°C
F°C 125°C 135°C
Gmin 15min 10min
ESIE05-03.book Page 50 Wednesday, April 6, 2005 4:09 PM

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