Daikin RZQ125B7W1B [133/326] High pressure protection control

Daikin RZQ100B8V3B [133/326] High pressure protection control
ESIE05-03 Outdoor Unit Functional Concept
Part 2 Functional Description 2–49
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2
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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. In case of RZQ100~140, low pressure is a calculated value.
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 > (C) bar
15 times or
less stop-
ping in 300
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
frequency +1 step/1 min
Compressor operation
frequency +1 step/5 min
Hp > (D) bar
Hp > (C) bar
OR
OR
&
&
Hp < (H) bar
Hp > (E) bar*
HPS activates
HPS activates
Stopped 16 times in
300 minutes
Hp < (F) bar
HPS activates
Hp > (E) bar for
1 minute
HPS activates
Stopped 16 times
in 300 minutes
(When cooling operation)
(When heating operation)
Hp < (G) bar
Hp < 3.24Mpa
30 sec elapsed
Note: (E) bar* = (E) bar for 1 minute
RZQ71B RZQ100~140B
A Hz 79 Hz 58 Hz
B Hz 62 Hz 58 Hz
RZQ71B RZQ100~140B
C bar 35.3 bar 35.3 bar
D bar 36.3 bar 36.3 bar
E bar 38.2 bar 38.2 bar
F bar 34.8 bar 34.8 bar
G bar 32.9 bar 32.9 bar
H bar 33.8 bar 33.8 bar
I bar 38.2 bar 38.2 bar
ESIE05-03.book Page 49 Wednesday, April 6, 2005 4:09 PM

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