Low Pressure Protection Control - Daikin CMSQ200A7W1B Service Manual
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Also See for CMSQ200A7W1B:
- Installation manual (238 pages) ,
- Operation manual (10 pages) ,
- Service manual (502 pages)
Table of Contents
Protection Control
4.2
Low Pressure Protection Control
This low pressure protection control is used to protect compressors against the transient
decrease of low pressure.
[In cooling operation]
★
Low pressure not limited
Pe<0.34MPa
Low pressure limited
Pe<0.25MPa
Pe<0.07MPa
Low pressure standby
[In heating operation]
★
Low pressure not limited
Pe<0.17 MPa
INV upper limit frequency:
3-step down from current
compressor frequency
Pe<0.17 MPa
Pe<0.13 MPa
52 Hz
48
In the case of multi-outdoor-unit system, the entire system performs this control in the
following sequence.
Pe>0.39MPa
52 Hz
In the case of multi-outdoor-unit system, each outdoor unit performs this control
individually in the following sequence.
Pe >0.23 MPa
&
INV upper limit Hz = MAX
After 10 sec.
Low pressure limited
After 10 sec.
Pe<0.07 MPa
Low pressure standby
Pe: LP pressure sensor detection
Pe<0.15MPa
When occurring 4 times within 30 min.,
the malfunction code " E4 " is output.
Pe: LP pressure sensor detection
value for each outdoor unit
Pe
>0.20 MPa
INV upper limit frequency: 1-step
up from current compressor
frequency
After 15 sec.
When occurring 4 times within 30 min.,
the malfunction code "E4" is output.
value for master unit
Hot gas SVP = OFF
Pe>0.30MPa
Hot gas SVP = ON
Hot gas SVP = OFF
Pe<0.12MPa
Hot gas SVP = ON
SiBE28-805
Pe>0.17MPa
Function
- Quick Links:
- Indoor Units
- Specifications
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Troubleshooting
