Midea MDV-252(8)W/D2RN1T(C)

V4+R VRF 50/60Hz
46 201608
Midea V4+R Series Service Manual
2.2 Components
Layout 2.2.1
Figure 5-2.2: Outdoor unit main PCB components
Function of buttons SW1 to SW4 2.2.2
Table 5-2.2: Function of buttons SW1 to SW4
Button
Function
SW1
Force cooling
SW2
System check
SW3
Reserved
SW4
Reserved
SW2 system check button 2.2.3
Before pressing SW2, allow the system to operate steadily for more than an hour. On pressing SW2, the parameters listed
in Table 5-2.3 will be displayed in sequence.
Table 5-2.3: SW2 system check
DSP1
content
Parameters displayed on DSP2
Remarks
- 0
Outdoor unit address
Master unit: 0; slave units: 1, 2, 3
- 1
Outdoor unit capacity
Refer to Note 1
- 2
Number of outdoor units
Displayed on master unit PCB only
- 3
Operating mode
Refer to Note 2
- 4
Outdoor unit output metric (total of all units)
Displayed on master unit PCB only
- 5
Indoor unit demand metric in cooling mode
- 6
Indoor unit demand metric in heating mode
- 7
Indoor unit demand metric in cooling mode after ambient temperature
correction
- 8
Indoor unit demand metric in heating mode after ambient temperature
correction
Table continued on next page …
ENC1
ENC3
S12
S3
S7
S1
ENC2
S4
S2
ENC4
SW4
SW2
SW3
SW1
Buttons
SW1/2/3/4
DSP1
DSP2
] Digital display
Current sensors
Main control chip
Communication chip
Inverter drive chips
LED indicators
LED1/2/3
LED indicators
LED4/5
LED indicators
LED6/7