Midea MDV-252(8)W/D2RN1T(C) - Part 4 Field Settings

V4+R VRF 50/60Hz
201702 35
Part 3 - Control
Table 3-7.2: Indoor unit component control during oil return operation in cooling mode
Component
Unit state
Control functions and states
Fan
Thermo on
Remote controller setting
Standby
Off
Thermo off
Off
Electronic expansion valve
Thermo on
Normal control
Standby
300 (steps)
Thermo off
300 (steps)
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
14-16HP
Control functions and states
Inverter compressor A
COMP(INV)
●
●
Controlled according to load requirement
Inverter compressor B
COMP(INV1)
●
DC fan motor A
FANA
●
●
Controlled according to discharge pressure
DC fan motor B
FANB
●
●
Electronic expansion valve A
EXVA
●
●
Fully open
Electronic expansion valve B
EXVB
●
●
Four-way valve
ST1
●
●
Off
Four-way valve
ST2
●
●
Off
Four-way valve
ST3
●
●
On
Solenoid valve (liquid refrigerant injection)
SV2
●
●
Normal control
Solenoid valve (oil balance)
SV4
●
●
Normal control
Solenoid valve (fast defrosting)
SV5
●
●
Off
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)