Daikin RZQ71~125B7V3B, Service Manual

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Outdoor Unit Functional Concept ESIE04-01
2–46 Part 2 – Functional Description
3
1
2
4
5
3.3.4 High Pressure Protection Control
Outline In order to prevent abnormal high pressures in the system and hence avoiding activation of the high
pressure safety device the below control function will be activated.
Details The high pressure value will be calculated from the low pressure, power input and compressor
frequency.
P
HPS opens at : 40 bar (tolerance: +0 / -0.15)
P
HPS closes at : 30 bar (tolerance : +/- 0.15)
Flow chart
Parameters
Normal operation
OR
Hp > 3.53 MPa
15 times or
less stop-
ping in 200
minutes
Normal operation
Compressor operation
frequency B Hz
Compressor stop
Malfunction stop (E3 indication)
Malfunction stop (E3 indication)
Compressor stop
Compressor operation
frequency A Hz
Compressor operation
frequency –1 step/10 sec
Compressor operation
fre1 step/1 min
Compressor operation
fre1 step/5 min
Hp > 3.58 MPa
Hp > 3.43 MPa
OR
OR
&
&
Hp < 3.38 MPa
• Hp > 3.82Mpa
• HPS activates
• HPS activates
• Stopped 16 times in
200 minutes
Hp < 3.48 MPa
• HPS activates
• Hp > 3.82 MPa
for 1 minute
• HPS activates
• Stopped 16 times
in 200 minutes
(When cooling operation) (When heating operation)
Hp < 3.29 MPa
• Hp < 3.24Mpa
• 30 sec elapsed
RZQ71B RZQ100 ~125B
A Hz 79 Hz 62 Hz
B Hz 62 Hz 62 Hz
RZQ - Final.book Page 46 Wednesday, September 8, 2004 8:40 AM