Daikin RZQ71~125B7V3B, Service Manual

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ESIE04-01 Outdoor Unit Functional Concept
Part 2 – Functional Description 2–45
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2
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5
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3.3.3 Low Pressure Protection Control
Outline In order to prevent abnormal low pressures in the system, the below control function will be activated.
Low pressure is measured by the low pressure sensor.
Flow chart
Parameters
Normal operation
Lp < 0.49
MPa
Normal operation
&
(When cooling operation)
(When heating operation)
• Within 5 minutes after defrosting
• Lp < 0.1 MPa coninuously
Upper limit A Hz
Copmressor upper
limit frequency
B Hz
Compressor upper
limit frequency
C Hz
Compressor upper limit
frequency
C Hz
Compressor stop: O Hz
Malfunction stop (E4 indication)
• Within 5 minutes after
starting
• Within 10 minutes after
defrosting &
• OR
• Lp < 0.15 Mpa
&
• Lp > 0.59 Mpa
• 30 sec elapsed
10 times or less
stopping in 200 minutes
LP < 0.1 MPa continues
for 5 minutes
10 times or less stopping
in 200 minutes
Lp < 0.1 MPa
LP > 0.15 MPa
Condition D*
Condition D*
LP > 0.25 MPa
LP > 0.2 MPa
Stopped 11 times in 200 minutes
• Within 5 minutes after starting
• After 10 minutes after defrosting
Condition D* : &
• OR
• Lp > 0.15 Mpa
RZQ71B RZQ100 ~125B
A Hz 109 Hz 123 Hz
B Hz 62 Hz 62 Hz
C HZ 48 Hz 62 Hz
RZQ - Final.book Page 45 Wednesday, September 8, 2004 8:40 AM