Heat Pump Mini VRF Outdoor Unit 6 720 862 440 (2016/04)
TROUBLESHOOTING | 9
Table 7-1
Symptoms
Causes Solution
Unit does not start
• Power failure.
• Power switch is off.
• Fuse may have been activated.
• The batteries in the remote controller may need
changing.
• Wait for the electrical power supply to re-
establish.
• Switch on the power.
• Only a competent person is to replace the fuse.
• Replace batteries.
Air is discharging, but isn‘t very
cold
• Temperature is not set correctly.
• The compressor could be in it‘s 3 minute
protection period.
• Set the correct temperature.
• Wait.
Unit stops and starts frequently
• Too much or too little refrigerant inside the
system.
• Air or other contaminants in system.
• Compressor malfunction.
• Voltage is too high or too low.
• System circuit is blocked.
• A qualified person should check for refrigerant
leaks and for the correct refrigerant pressure.
• Vacuum and recharge refrigerant.
• Maintenance or change compressor.
• Install manostat.
• A qualified person should investigate.
Low cooling effect
• Outdoor unit and indoor unit heat exchangers are
dirty.
• The air filter is dirty.
• Inlet/outlet of indoor/outdoor units are blocked.
• Doors and windows are open
• Direct sunshine on outdoor unit.
• Too much heat resource in room.
• Outdoor temp. is too high.
• Leakage of refrigerant or lack of refrigerant.
• Clean the heat exchanger.
• Clean the air filter.
• Clean filters.
• Close doors and windows.
• Ensure the unit is not exposed to direct sunlight.
• Reduce heat source.
• AC cooling capacity reduces (normal).
• A qualified person should check for refrigerant
leaks and for the correct refrigerant pressure.
Low heating effect
• Outdoor temperature is lower than 7 °C
• Doors and windows not completely closed.
• Leakage of refrigerant or lack of refrigerant.
• Use heating device.
• Close doors and windows.
• A qualified person should check for refrigerant
leaks and for the correct refrigerant pressure.
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