194
Failure code
Outdoor
digital
display tube:
45
Indoor wired
controller:
2D
Indoor unit LED status
LED5
Failure description:
Communications between outdoor units
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
◆
Incorrect order of outdoor
communication wire;
◆
Incorrect wiring of outdoor
communication wire;
◆
Incorrect terminal
connection of outdoor
communication wire;
◆
Incorrect setting of address
dip switch of outdoor unit;
3. Abnormity confirmation
conditions
No communication for 30s (E)
4. Possible causes
◆
Poor communication
wire: short circuit or
disconnection;
◆
Non-corresponding
communication wire A, B and
C;
◆
Incorrect connection of
outdoor unit communication
port of PCB;
◆
Interference source,
which causes unstable
communication of outdoor
unit.
Replace it correctly by after-
sales personnel on site.
Check if the communication wire
between the outdoor units is normal.
Check if the address DIP switch
of outdoor unit is correct.
Check if there is interference source in the
position where the outdoor unit is installed.
Power off the outdoor unit and research it.
Replace the outdoor unit PCB
Reset it correctly by after-
sales personnel on site.
Clear the interference
source.
N
N
N
Y
Y
Y
N
Summary of Contents for MRV 5-RC AB052MAERA
Page 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Page 3: ......
Page 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Page 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Page 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 ...
Page 116: ...113 2 Preparation before installation ...
Page 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Page 165: ...162 One by four valve box PCB code 0151800466 ...