196
Failure code
Outdoor
digital
display tube:
46-4, 5
Indoor wired
controller:
2E
Indoor unit LED status
LED5
Failure description:
Communication with fan motor module
board 1, 2 failure
20 times
Outdoor unit LED status
LED1
LED2
Normal
Normal
1. Model
Diagnosis and troubleshooting
MRV 5-RC series
Diagnosis
Troubleshooting
2. Abnormity detection method
◆
Check if the communication
wire correspondence of fan
motor is correct;
◆
Check if the communication
wire is disconnected;
◆
Check if the driver module
whitch power supply to the fan
motor is powered
3. Abnormity confirmation
conditions
Fan motor has a host computer
or compressor inverter, no
communication for 30s
4. Possible causes
◆
Poor communication wire:
disconnection;
◆
Incorrect correspondence
of INV1 and INV2; incorrect
connection of outdoor unit
communication port of PCB;
◆
Poor inverter board or
connection board
Replace it correctly by after-
sales personnel on site.
Check if the connection of fan
motor communication wire and
compressor module wire is correct
Check if the communication wire
of fan motor is disconnected;
Test if the voltage of the two
central needles of CN28 and
CN57 changes by a multimeter.
Replace it correctly by after-
sales personnel on site.
Replace the interface
board of outdoor unit.
N
N
Y
Y
N
Y
Check if the compressor module
connected with the fan motor is
OK
N
Replace the compressor module
Содержание MRV 5-RC VP1-112B
Страница 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Страница 3: ......
Страница 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Страница 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Страница 106: ...103 2 Dimension 4 19 200 60 25 25 25 249 108 232 84 69 388 73 82 65 103 177 4 44 4 35 277 ...
Страница 116: ...113 2 Preparation before installation ...
Страница 130: ...127 2 Dimension 290 67 410 220 567 137 160 189 57 144 109 159 159 212 393 4 22 65 65 65 65 65 44 65 76 4 52 67 156 830 ...
Страница 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Страница 165: ...162 One by four valve box PCB code 0151800466 ...