Midea LRSJF-V N1, Owner'S Manual

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Symptom 4: Noise of heat pump’s cooling
Symptom 3.1: Outdoor unit
Symptom 4.1: Outdoor unit
When the system is changed over to heating operation after
defrost operation Moisture generated by defrost becomes
steam and is exhausted.
A continuous low hissing sound is heard when the system is in
operation.
This is the sound of refrigerant gas flowing through both indoor
and outdoor units.
A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation.
This is the noise of refrigerant caused by flow stop or flow
change.
When the tone of operating noise changes.
This noise is caused by the change of frequency.
Symptom 5: Dust comes out of the unit
Symptom 6: The units can give off odours
When the unit is used for the first time in a long time.
This is because dust has gotten into the unit.
The unit can absorb the smell of rooms, furniture, cigarettes,
etc., and then emit it again.
Symptom 7: The outdoor unit fan does not
spin.
During operation. The speed of the fan is controlled in order to
optimize product operation.
The operation lamp is flashing rapidly (twice every second)
This lamp is still flashing rapidly after turn off the power and turn
on again.
Remote controller receives malfunction or the button does not
work well.
A safety device such as a fuse, a breaker frequently actuates.
Obstacles and water enter the unit.
Water leaks from indoor unit.
Other malfunctions.
7. TROUBLESHOOTING
If one of the following malfunctions occur, stop operation, shut
off the power, and contact with your dealer.
If the system does not properly operate except the above
mentioned cases or the above mentioned malfunctions is
evident, investigate the system according to the following
procedures. (see in Table 7-1)
7.1. Troubles and causes of heat pump
5
owner's manual
Solution
Clean the heat exchanger.
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.
Causes
Unit does not start
Air flowing normally but
completely can't cooling
Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote controller exhausted
or other problem of controller.
Temperature is not set correctly.
Be in 3 minutes protection of
compressor.
Refrigerant is too little or too much.
Air or no concreting gas in the
refrigerating circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Outdoor unit and indoor unit heat
exchanger is dirty.
The water filter is dirty.
Inlet/outlet of indoor/outdoor units is
blocked.
Sunlight directly shine.
Too much heat resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of
refrigerant.
Wait for the comeback of power.
Switch on the power.
ReplLocation:
Replace the batterises or check the
controller.
Set the temperature properly.
Wait.
Check leakage, and rightly recharge
refrigerant.
Vacuum and recharge refrigerant.
Maintenance or change compressor.
Install manostat.
Find reasons and solution.
Use heating device.
Check leakage and rightly recharge
refrigerant.
Outdoor temperature is lower than 7 C
Leakage of refrigerant or lack of
refrigerant.
Table 7-1
Units start or stop frequently
Low cooling effect
Low heating effect
Water flowing normally but
completely can't cooling
Unit does not start
Symptoms