114
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-HR series
DiagnosisT roubleshooting
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
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 i f the connection of f an
motor communication w ire and
compressor module wire is correct
Check if the communication wire
of fan motor is disconnected;
Test i f the voltage o f the two
central needles o f CN28 a nd
CN57 changes by a multimeter.
Replace it correctly by after-
sales personnel on site.
Replace the interfac e
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
To Next Page
Loading...
