Midea MV6-i900WV2GN1-E - Page 47

V6-i VRF 50/60Hz
46
Midea V6-i Series Service Manual
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
Wiring
diagram label
8-12HP
14-18HP
20-24HP
26-28HP
30-32HP
Control functions and states
Inverter compressor A
COMP(A)
●
●
●
●
●
Fixed frequency
Inverter compressor B
COMP(B)
●
●
●
DC fan motor A
FANA
●
●
●
●
●
Fan speed controlled according
to discharge pressure
DC fan motor B
FANB
●
●
●
Electronic expansion valve A
EXVA
●
●
●
●
●
Position 480 (steps) or 3000
(steps)
Electronic expansion valve C
EXVC
●
●
●
●
●
Position 96 (steps)
Four-way valve
ST1
●
●
●
●
●
Off
Solenoid valve (oil balance)
SV4
●
●
●
●
●
Normal control
Solenoid valve (fast defrosting)
SV5
●
●
●
●
●
On
Solenoid valve (EXV bypass)
SV6
●
●
●
●
●
On
Solenoid valve (indoor units
bypass)
SV7
●
●
Normal control
Solenoid valve (inverter
compressor A vapor injection)
SV8A
●
●
●
●
Off
Solenoid valve (inverter
compressor B vapor injection)
SV8B
●
●
Off
Solenoid valve (inverter
compressor B pressure balance)
SV9
●
●
●
Open before compressor B
startup
Table 3-7.4: Indoor unit component control during oil return operation in heating mode
Component
Unit state
Control functions and states
Fan
Thermo on
Off
Standby
Off
Thermo off
Off
Electronic expansion valve
Thermo on
480 (steps)
Standby
480 (steps)
Thermo off
480 (steps)