Midea MV6-R1000WV2RN1, Service Manual

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V6R VRF 50Hz
26
Midea V
6
R
Series S
er
vice M
anual
1 General Control Scheme Flowchart
Sections 3-2 to 3-8 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 only/main cooling
operation

Startup control for heating only/main heating
operation
4
Thermo on
Normal operation control

Component control during normal operation

Compressor control

Heat exchanger control

Electronic expansion valve control

Outdoor fan control
5
Protection control

High pressure protection control

Low pressure protection control

Discharge temperature protection control

Over-current protection control

Ambient temperature out of range protection
control

Inverter module temperature protection control

Wet compression protection control

High pressure ratio protection control
6
Other control

Overload control

Pump-down control

Snow-blowing control

Auto mode and Dual set
points

Low noise mode

Power limitation mode
8