Midea Mini VRF C Series Owner's Manual page 10

Table 7-1
Symptoms
Unit does not start
Air flowing normally but
completely can't cooling
Units start or stop frequently
Low cooling effect
Low heating effect
Causes
• 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 air filter is dirty.
• Inlet/outlet of indoor/outdoor
units is blocked.
• Doors and windows are open
• Sunlight directly shine.
• Too much heat resource.
• Outdoor temp. is too high.
• Leakage of refrigerant or
lack of refrigerant.
• Outdoor temperature is lower than 7°C
• Doors and windows not
completely closed.
• Leakage of refrigerant or
lack of refrigerant.
8
Solution
• 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.
• Clean the heat exchanger.
• Clean the air filter.
• Eliminate all dirties and make air smooth.
• Close doors and windows.
• Make curtains in order to
shelter from sunshine.
• Reduce heat source.
• AC cooling capacity reduces
(normal). Check leakage and
rightly recharge refrigerant.
• Use heating device.
• Close doors and windows.
• Check leakage and rightly
recharge refrigerant.