202
Failure code
Outdoor
digital
display tube:
76-0, 1, 2
Indoor wired
controller:
4C
Indoor unit LED status
LED5
Failure description:
Incorrect settings of quantity, address or
capacity for outdoor unit
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 quantity of
outdoor unit changes; (76-0)
◆
Check if the address of
outdoor unit changes; (76-1)
◆
Check if the horse power of
outdoor unit changes.(76-2)
3. Abnormity confirmation
conditions
Quantity of sub-unit setting
does not conform to host
EEPROM data; address of sub-
unit setting does not conform
to host EEPROM data; horse
power setting of sub-unit does
not conform to host EEPROM
data.
4. Possible causes
◆
The quantity of connected
unit changes;
◆
The horse power of outdoor
unit of the same system
changes;
◆
The address setting of the
same system changes;
R e s e a r c h a n d l o c k t h e
outdoor unit.
Check if the horse power of
outdoor unit changes.
Check if the quantity of
outdoor unit changes.
Check if the address setting of
outdoor unit is correct.
R e s e a r c h a n d l o c k t h e
outdoor unit.
Replace it correctly by after-sales
personnel on site. Research and
lock the unit.
N
N
Y
Y
Y
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 ...