Midea MV6-i670WV2GN1-E - General Control Scheme Flowchart

V6-i VRF 50/60Hz
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Midea V6-i Series Service Manual
1 General Control Scheme Flowchart
Sections 3-2 to 3-7 on the following pages detail when each of the controls in the flowchart below is activated.
Legend
Numbers in the top right-hand
corners of boxes indicate the
relevant section of text on the
following pages.
Conditions met
for oil return
Conditions met
for defrosting
Thermo on
Special control
 Outdoor unit duty cycling
 Oil return operation
 Defrosting operation
7
Stop operation
 Abnormal shutdown
 System stops
 A unit stops when the load demanded decreases
2
Standby control
 Crankcase heater control
3
Startup control
 Compressor startup delay control
 Startup control for cooling operation
 Startup control for heating operation
4
Thermo on
Normal operation control
 Component control during normal operation
 Compressor output control
 Compressor step control
 Operation priority and rotation of compressors
 Electronic expansion valve control
 Outdoor fan control
5
Protection control
 High pressure protection control
 Low pressure protection control
 Discharge temperature protection control

Compressor and inverter module protection
control
 Disable heating control
6