V6R VRF 50Hz
44
Midea V
6
R
Series S
er
vice M
anual
Table 3-7.4: Indoor unit component control during defrosting operation
Cooling indoor unit
2000P EEV
500P EEV
FAN
Thermo ON unit
Keep the previous fan speed
Thermo OFF unit
Stop or Fan
Electronic expansion valve (EEV)
Thermo ON unit
Superheat control
Thermo OFF unit
1200pls
300pls
Stop or Fan
1200pls
300pls
Heating indoor unit (ODU operates cooling main operation)
2000P EEV
2000P EEV
FAN
(Set the controller to display E0, default)
Thermo ON unit
OFF
Thermo OFF unit
OFF
Stop
OFF
FAN
(Set the controller not to display E0)
Thermo ON unit
Low fan speed
Thermo OFF unit
Low fan speed
Stop
OFF
Electronic expansion valve (EEV)
(Set the controller to display E0, default)
Thermo ON unit
Within 2min: 1920pls
2-4min: 1200pls
After 4min: 480pls
Within 2min: 480pls
2-4min: 300pls
After 4min: 120pls
Thermo OFF unit
Stop or error stop
Electronic expansion valve (EEV)
(Set the controller not to display E0)
Thermo ON unit
0pls
0pls
Thermo OFF unit
Stop or error stop
Rotating Defrosting Operation
Timing of rotating defrosting operation:
Te<-2°C and T4<20°C, and either of the points below is met:
There is an obviously drop in the temperature of outdoor unit heat exchanger outlet
Cumulative operating time after the latest defrosting control arrives an hour
Switching action of two-module parallel system heat exchanger
Figure 3-7.2:
Switching action of two-module parallel system heat exchanger
Condition E
Total defrosting control time has reached 5 minutes.
T3 >Target value for a certain time.
Notes:
1.
This function is only available when the indoor units connected in V6R system are 2nd generation AC VRF indoor units (which will be released soon) or 2nd
generation DC VRF indoor units produced after May 31st, 2020 only (The package of upgraded indoor units will add yellow label on both sides to distinguish
the indoor units before and after the upgrade).
