mundoclima MUCS-20-W9, Руководство по обслуживанию

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11. Troubleshooting
Troubles and causes of air conditioner
If one of the following malfunctions occur, stop operation, shut off the power, and contact with your dealer.

The operation lamp is flashing rapidly (five times per second), you disconnect the unit with the power and
then connect the unit with the power again after two or three minutes but the lamps still flash.

Switch operations are erratic.

The fuse is blown frequently or the circuit breaker is tripped frequently.

Foreign matter or water has fallen inside the air conditioner.

Water leaks from the indoor unit.
If the system does not properly operate except the above mentioned cases or the above mentioned malfunctions
are evident, investigate the system according to the following procedures.
Symptoms Causes Solution
Unit does not start.
• Power failure/
• Power switch is off.
• Fuse of power switch may have burned.
• Batteries of remote controller exhausted
or other problem of controller.
• Wait for the comeback of
power.
• Switch on the power.
• Replace the fuse.
• Replace the batteries or check
the controller.
Air flowing normally but
completely can’t cooling.
• Temperature is not set correctly. • Set the temperature properly.
Units start or stop frequently.
• Air or no concreting gas in the watering
circuit.
• Three-way valve is malfunction.
• Voltage is too high or too low.
• System circuit is blocked.
• Temperature is not set correctly.
• Vacuum.
• Maintenance or change
three-way valve.
• Install manostat.
• Find reasons and solution.
Low cooling effect.
• Indoor unit heat exchanger is dirty.
• The air filter is dirty.
• Inlet/outlet od indoor unit is blocked.
• Doors and windows are open, sunlight
directly shine.
• Too much heat source.
• Leakage of water.
• 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.
Low heating effect.
• Doors and windows not completely
closed.
• Leakage of water.
• Use heating device.
• Close doors and windows.
• Check leakage.
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Four-way Cassette DC Fan Coil Unit