Discharge Pipe Temperature Control - Daikin SkyAir Service Manual

Frequency Regulating Functions
4.6

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
OR
OR
Parameters
Td = Discharge pipe temperature
70
Normal operation
Td > B°C
Compressor upper limit frequency
–1 step/20 sec
≥
• Td C°C
continues for 5 minutes
• &
• 300 sec
>
• Td D°C
Compressor upper limit frequency
H Hz
≥
• Td E°C continues
for G minutes
≥
• Td F°C
Compressor stop
Stopped 11 times
in 200 minutes
Malfunction stop (F3 indication)
RZQ71C7,
RZQS71·100C7V1B
A°C
B°C
C°C
D°C
E°C
F°C
Gmin
H Hz 118.5Hz
Compressor upper limit frequency
+1 step/1 min
≤
Td B°C
10 times or less stopping in 200 minutes
100°C
105°C
110°C
120°C
110°C
125°C
15min
SiBE28-804
• Td < A°C
OR
• Upper limit frequency
• &
= Maximum frequency
• Td < B°C
<
• Td A°C
OR
≤
• Td B°C
• &
• 5 min elapsed
RZQ100~140C7,
RZQS125·140C7V1B
100°C
105°C
110°C
120°C
115°C
135°C
10min
62Hz
Functional Description