Daikin ZQG71~140L7V1B Service Manual page 72

Function Details
3.2.15 Discharge Pipe Temperature Protection Control
Electronic expansion valve opening degree and the compressor operating frequency will be
controlled in order to avoid abnormal high compressor temperatures.
Td: Discharge pipe temperature
Compressor Operating Frequency Control
OR
OR
Electronic Expansion Valve Opening Degree Control
Td: Compressor discharge pipe temperature (°C)
3.2.16 Capacitor Electric Discharge Control
After the operation stopped (the stop caused by the remote controller, an error, and the
compressor and outdoor unit fan motor when retry thermo. is off), open phase waveform is
output for about one minute for electric discharge of the capacitor.
Afterwards, electric discharge will continue due to discharge resistance until the capacitor
voltage becomes 0 V. At this time, operation sound may be heard from the outdoor unit.
60
Normal operation
Td > 105°C
Compressor upper limit frequency
–1 step/20 sec.

• Td 110°C
continues for 5
• &
minutes
>
• Td A°C
Compressor upper limit frequency
RZQG71L: 12 steps
RZQG100-140L: 9 steps

• Td B°C continues
for C minutes

• Td 125°C
Compressor stop
Stopped 11 times
in 200 minutes
Abnormal stop (F3 indication)
A°C
B°C
C minutes
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
Compressor upper limit frequency
+1 step/1 min.

Td 105°C
10 times or less stopping in 200 minutes
RZQG71L
105°C
120°C
5 minutes
Normal control
Td 90°C
• Td < 70°C
OR
• Upper limit frequency
• &
= Maximum frequency
• Td < 105°C
<
• Td 70°C
OR

• Td 105°C
• &
• 5 min. elapsed
RZQG100-140L
105°C
115°C
10 minutes
Td  80°C
Electronic expansion valve opening
degree lower limit
-5 pulses/Cooling for 2 minutes
Heating for 1 minute
Function and Control
ESIE12-06