Daikin RZQG71L9V1, Service Manual

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Function Details ESIE15-13C
42 Function and Control
3.2.12 High Pressure Protection Control
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.
3.2.13 Heating Control at High Outdoor Air Temperature
Under the condition of heating overload, control the outdoor unit fan in order to secure the
difference of elevation pressure and the pressure ratio of the compressor.
(Cooling) (Heating)
Normal operation
Hp > 3.57 MPa Hp < 3.42 MPa Hp > 3.53 MPa
Hp < 3.52 MPa
Hp < 3.42 MPa Hp > 3.67 MPa
Compressor operation
frequency –1 step/10 sec.
Compressor operation
fre1 step/1 min.
Normal operation
Compressor operation
frequency B Hz
Compressor stop
Abnormal stop (E3 indication)
Compressor operation
fre1 step/5 min.
Compressor operation
frequency A Hz
Compressor stop
Abnormal stop (E3 indication)
OR
• HPS activates
• Hp > 3.92 MPa
for 1 minute
• Hp < 3.24 MPa
• 30 sec elapsed
15 times or less
stopping in 300
minutes
• Hp > 3.92 MPa
• HPS activates
• Stopped 16 times in
300 minutes
• Stopped 16 times
in 300 minutes
&
OR
RZQG71L RZQG100-140L
A Hz 118.5 Hz 94.5 Hz
B Hz 57 Hz 94.5 Hz
Normal
• Hp-Lp < 0.39 MPa
• Hp > 3.43 MPa
OR
&
• &
• Hp < 2.75 MPa
OR
• Hp-Lp > 0.69 MPa
• OR
•&
• Lp < 0.12 MPa
(
(
(
(
( (
Outdoor unit fan
-1 step/30 sec.
Outdoor unit fan
+1 step/30 sec.
• Hp-Lp > 0.59 MPa
• Hp < 3.33 MPa
• Hp < 3.24 MPa
• Outdoor unit fan = 8 step