Daikin RZQ100B8V3B Service Manual page 134

Outdoor Unit Functional Concept
3.3.5 Discharge Pipe Temperature Control
1
Outline
2
Flow chart
3
4
5
Parameters
2–50
The compressor operating frequency will be controlled in order to avoid abnormal high compressor
temperatures (see also expansion valve control).
Normal operation
Td > B°C
Compressor upper limit frequency
–1 step/20 sec
≥
• Td C°C
• &
Td
• 300 sec
OR
>
• Td D°C
Compressor upper limit frequency
79 Hz (RZQ71)
58 Hz (RZQ100~140)
≥
• Td E°C continues
OR
for G minutes
≥
• Td F°C
Compressor stop
Stopped 11 times
in 200 minutes
Malfunction stop (F3 indication)
A°C
B°C
C°C
D°C
E°C
F°C
Gmin
Td = Discharge pipe temperature
Compressor upper limit frequency
+1 step/1 min
≤
B°C
10 times or less stopping in 200 minutes
RZQ71B
100°C
105°C
110°C
120°C
110°C
125°C
15min
ESIE05-03
• Td < A°C
OR
• Upper limit frequency
• &
= Maximum frequency
• Td < B°C
<
• Td A°C
OR
≤
• Td B°C
• &
• 5 min elapsed
RZQ100~140B
100°C
105°C
110°C
120°C
115°C
135°C
10min
Part 2 – Functional Description