206
Failure code
Outdoor
digital
display tube:
111-1, 2
Indoor wired
controller:
6F
Indoor unit LED status
LED5
Failure description:
Compressor out of control
20 times
Outdoor unit LED status
LED1
LED2
Normal
Normal
1. Model
Failure diagnosis and troubleshooting
MRV 5-RC series
Diagnosis
Troubleshooting
2. Abnormity detection method
◆
Check if the module is in
normal conditions and if P and
N is short-circuited to U, V and
W; Measure with diode to see if
there is a voltage drop between
P/N and U/V/W.
◆
Check if the module is
securely fixed and the heat
dissipation is good;
◆
Check if the compressor
winding is normal.
◆
Check if the compressor
wiring UVW is connected
correctly and the inverter board
and module board is securely
wired.
3. Abnormity confirmation
conditions
Over current of module
hardware
4. Possible causes
◆
The module alarms failure
as it broke down;
◆
Liquid shock is found in
compressor which results in
over current upon starting or
operating;
◆
The compressor winding is
burned out;
◆
UVW wiring is wrongly
connected or the inverter board
and module board are wired
insecurely.
Check if the supply voltage is normal
Check if the electrical cabinet and
compressor wires are secured, the
UVW is correctly connected and
the variable frequency board and
module board are wired correctly.
Check if the PWM signals
from 6 channels on variable
frequency control board and
IPM driver board are normal.
Check if the power module is normal
Check if the compressor, resistance
and insulation are normal
The compressor is overloading
and check for the causes.
Replace on site by after-sales
personnel.
Replace on site by after-sales
personnel.
Replace the variable frequency
control board.
Replace the power module.
Replace the compressor.
Y
Y
Y
Y
Y
N
N
N
N
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 ...