2m continuously
13 13(0DH) 31D Solenoid valve
abnormal
Solenoid valve act
incorrectly 3 times
continuously
○
14 76(4CH) 15D Discharging temp.
sensor abnormal
Sensor broken down or
short circuit for more than
2m continuously
○
15 05(05H) 17D EEPROM abnormal EEPROM data missing Run as the
default
value
16 84(54H) 26D Pressure
abnormal(low
pressure)
Low pressure switch acts in
normal running
○
17
80（50H）
15D Compressor overheat the discharging
temperature is higher than
120degree
Resumable
if lower
than
100degree
18
12（0CH）
23D Abnormal mode Indoor operation mode is
different with the running
indoor unit.
○
19
75（4BH）
18D Outdoor coil
B(suction temp
sensor—for MRV II)
Sensor broken down or
short circuit for more than
2m continuously
○
20
77（4DH）
15D Outdoor discharging
B(oil temp
sensor—for MRV II)
Sensor broken down or
short circuit for more than
2m continuously
○
○ shows resumable fault, ※ shows it is not resumable fault.
Setting address method:
The address setting can be realized by setting indoor PCB.
If you use the group control function, there should be a master unit and 15 sets of slave units.
For the master unit, the SW5-3 should be at “1”. For the slave units, the SW5-3 should be at
“0”.
Please refer the below table,
Indoor
unit
address
SW1-4 SW1-3 SW1-2 SW1-1
1 OFF OFF OFF OFF
2 OFF OFF OFF ON
3 OFF OFF ON OFF
4 OFF OFF ON ON
5 OFF ON OFF OFF
6 OFF ON OFF ON
7 OFF ON ON OFF
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