Midea LRSJF-V120

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)
exchanger is dirty.
 The water filter is dirty.
 Inlet/outlet of indoor/outdoor units is
blocked.
 Sunlight shines directly.
 Too much heat resource.
 Outdoor temp. is too high.
 Leakage of refrigerant or lack of
refrigerant.
 Clean the water filter.
 Eliminate all dirties and make air
smooth.
 Make curtains in order to shelter from
 sunshine.
 Reduce heat source.
 AC cooling capacity reduces
(normal).
 Check leakage and rightly recharge
refrigerant.
Low heating effect
Outdoor temperature is lower than 7℃
Leakage of refrigerant or lack of refrigerant.
 Use heating device.
 Check leakage and rightly recharge
refrigerant.
4. Malfunction Code and Troubleshooting
If there is phenomenon as follows, please stop running and cut power supply and refer to the following.
If the problem still appears, please contact with your dealer and offer machine’s model and detailed malfunction.
4.1 Outdoor unit malfunction Code and troubleshooting
Display
Malfunction or Protection
E0
EEPROM error
E2
Communication error of the outdoor chip and the indoor chip
E3
Communication error
E4
T3, T4 sensor error
E5
Voltage protection error
E6
Direct-current fan error
E7
Heating fan error in the area A lasts for 5 minutes
E8
There are two times E6 error in 10 minutes(recovery will be after power off)
P0
The cooling fin high temperature protection
P1
High pressure protection
P2
Low pressure protection
P3
Compressor current protection
P4
Discharge temperature protection
P5
Outdoor condenser T3 high temperature protection
P6
Modules protection
P7
Evaporator T2 high temperature protection
P8
Typhoon protection
Display Function Instruction:
1. When stand by, LED displaying the amount of indoor units online which communicate with outdoor units.
2. When operation, LED displaying frequency value of compressor. 3. When defrost, LED displaying “dF”.