Protection Control; Low Pressure Protection Control; High Pressure Protection Control - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

SiBE26-701

2.4.5 Protection Control

2.4.5.1 Low Pressure Protection Control

Drooping control and protection control below mentioned are conducted to prevent low pressure
from abnormal lowering.

2.4.5.2 High Pressure Protection Control

Drooping control and protection control below mentioned are conducted to prevent high
pressure from abnormal rising and activation of protection devices.
Function and Operation
[When cooling operation]
Normal operation
·
Lp<0.34
Lp>0.38MPa
&
·
MPa
30 sec. elapsed
Compressor frequency
62 Hz
Lp<0.15
Lp>0.20MPa
MPa
Hot gas bypass valve : ON
Lp<0.07 MPa continues
Stopped 3 times in 100 minutes
Malfunction stop (E4 indication)
[When cooling operation]
Normal operation
Hp>3.56
MPa
Compressor operation
frequency -1 step / 10 sec.
Hp>3.63
MPa
Compressor operation
frequency 62Hz
Hp>3.68MPa
Stopped times in 30 minutes
Malfunction stop (E3 display)
[When heating operation]
Lp<0.19MPa
Lp<0.13MPa
Hot gas bypass valve : ON
3 minutes elapsed
Compressor stop: 0 Hz
[When heating operation]
Normal operation
Hp>3.38
MPa
Compressor operation
frequency 62Hz
3 minutes elased
Compressor stop : 0 Hz
Outdoor Unit
Normal operation
Lp>0.23MPa
Compressor frequency
124 Hz
Lp>0.17MPa
Compressor frequency
62 Hz
·
Hp<3.09MPa
&
·
30 sec. elapsed
65