Midea V6 Series Service Manual page 48

Tables 3-7.3 and 3-7.4 show component control during oil return operation in heating mode.
Table 3-7.3: Outdoor unit component control during oil return operation in heating mode
Component
Inverter compressor A
Inverter compressor B
DC fan motor A
DC fan motor B
Electronic expansion valve A
Electronic expansion valve B
Electronic expansion valve C
Four-way valve
Solenoid valve (oil balance)
Solenoid valve (fast defrosting (in
heating) and unloading (in cooling))
Solenoid valve (EXV bypass)
Solenoid valve (indoor units bypass)
Solenoid valve (inverter compressor
A vapor injection)
Solenoid valve (inverter compressor
B vapor injection)
Solenoid valve (inverter compressor
B pressure balance)
Table 3-7.4: Indoor unit component control during oil return operation in heating mode
Fan
Electronic expansion valve
Wiring diagram
8-12HP
label
COMP(A)
●
COMP(B)
FANA
●
FANB
EXVA
●
EXVB
EXVC
●
ST1
●
SV4
●
SV5
●
SV6
●
SV7
SV8A
●
SV8B
SV9
Component Unit state
Thermo on
Standby
Thermo off
Thermo on
Standby
Thermo off
14-16HP 18-28HP 30-32HP
● ● ●
● ●
● ● ●
● ●
● ● ●
● ● ●
● ● ●
● ● ●
● ● ●
● ● ●
● ● ●
● ●
● ● ●
● ●
● ●
Control functions and states
Off
Off
Off
480 (steps)
480 (steps)
480 (steps)
V6 VRF 50Hz
Control functions and states
Fixed frequency
Fan speed controlled according to
discharge pressure
Position 480 (steps)
Position 96 (steps)
Off
Normal control
On
On
Normal control
Off
Off
Open before compressor B startup
47