Midea MV6-252WV2GN1 Service Manual page 47

V6 VRF 50/60Hz
Tables 3-7.1 and 3-7.2 show component control during oil return operation in cooling mode.
Table 3-7.1: Outdoor unit component control during oil return operation in cooling 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 3-7.2: Indoor unit component control during oil return operation in cooling mode
Fan
Electronic expansion valve
46
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
Remote controller setting
Off
Off
Normal control
300 (steps)
300 (steps)
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
Controlled according to inverter
compressor A
Controlled according to inverter
compressor B
Open before compressor B startup