Daikin RZQ Series FCQ20EVA Service Manual page 49

SiME281501E
4.2.13 Discharge Pipe Temperature Control
The compressor operating frequency will be controlled in order to avoid abnormal high compressor
temperatures (see also electronic expansion valve control).
Td > B°C
Compressor upper limit frequency
• Td  C°C
• & continues for 5 minutes
OR
• 300 sec.
• Td > D°C
Compressor upper limit frequency
• Td E°C continues
OR
for G min.
• Td F°C
Stopped 11 times
in 200 minutes
Abnormal stop (
[Electronic expansion valve opening degree control]
Td: Discharge pipe temperature
Function and Control
Normal operation
–1 step/20 sec.
Td B°C
H Hz
Compressor stop
F3
indication)
RZQ20/24LVA
A °C 100 °C
B °C 105 °C
C °C 110 °C
D °C 120 °C
E °C 110 °C
F °C 125 °C
G min. 15 min.
H Hz 97.5 Hz
Td > 95˚C
Electronic expansion valve opening
degree lower limit
+5 pulses/Cooling for 2 minutes &
heating for 1 minute
Td > 100˚C
Electronic expansion valve opening
degree lower limit
+10 pulses/Cooling for 2 minutes &
heating for 1 minute
• Td < A°C
OR
• Upper limit frequency
• &
• Td < B°C
Compressor upper limit frequency
+1 step/1 min.
10 times or less stopping in 200 minutes
RZQ36/45LVA,
RZQ45/48MYL
100 °C
105 °C
110 °C
120 °C
115 °C
135 °C
10 min.
62 Hz
Normal control
Td < 90˚C
Function Details
= Maximum frequency
• Td < A°C
OR
• Td B°C
• &
• 5 min. elapsed
Td < 80˚C
Electronic expansion valve opening
degree lower limit
-5 pulses/Cooling for 2 minutes &
heating for 1 minute
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