Daikin RMXS-L Series, Руководство по обслуживанию

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Protection Control SiUS181305E
51 Function
4.2 Low Pressure Protection Control
Outline Low pressure protection control is used to protect compressors against the temporary decrease of
low pressure.
<Cooling Operation>
<Heating Operation>
Pe < 0.25 MPa (84 ftAq)
36 Hz Unload
Pe > 0.39 MPa (130 ftAq)
Pe < 0.07 MPa (23 ftAq)
Low pressure not limited
Hot gas bypass valve = OFF
Hot gas bypass valve = ON
(R19081)
Low pressure
limited
Pe: Low pressure sensor detection value
Low pressure
standby
When occurring 3 times within 30 minutes,
the error code
E4 is output.
Pe < 0.15 MPa
(50 ftAq)
Pe > 0.30 MPa
(100 ftAq)
&
Pe > 0.09 MPa (30 ftAq)
or
Ts1 – Te < 8˚C (14.4˚F)
Pe > 0.06 MPa (20 ftAq)
After 10 sec. Pe < 0.17 MPa (57 ftAq)
Pe < 0.17 MPa (57 ftAq)
Pe > 0.20 MPa (67 ftAq)
Pe < 0.07 MPa (23 ftAq)
After 15 sec.
Low pressure not limited
Low pressure limited
Current step limited
Hot gas bypass valve = OFF
Hot gas bypass valve = ON
(R19082)
Low pressure
standby
When occurring 3 times within 30 minutes,
the error code
E4 is output.
Pe: Low pressure sensor detection value
Pe < 0.12 MPa
(40 ftAq)
Pe > 0.17 MPa
(57 ftAq)
Upper limit frequency: 3-step down
Upper limit frequency: 1-step up