Midea MKG-400 User Manual

Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201606
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13.7.1 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 (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.
• Water leaks from indoor unit.
• Other malfunctions.
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.
Low cooling effect
• Indoor unit heat exchanger is dirty;
• The air filter is dirty;
• Inlet of indoor unit is blocked;
• Doors and windows are open;
• Sunlight shine directly;
• Too many heat resources;
• Outdoor temperature is too high.
• 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 resource;
• AC cooling capacity reduces
(normal).
Low heating effect
• Outdoor temperature is lower than
7℃;
• Doors and windows are not completely
closed.
• Use heating device;
• Close doors and windows.
13.7.2 Troubles and causes of remote controller
E3: T1 evaporator sensor malfunction
T1 connecting wire between sensor and
mainboard gets loose.
Temperature sensor is short-circuited or
punctured.
Chip fault, or chip foot sheds off, or chip is
inverted. (correct mode is semicircular bent
alignment.)
Main board error: for example, getting wet.
Reconnect and ensure that the
connection is reliable.
Replace sensor.
Reinstall chip, or install other chip
with same model on the faulty
unit, to check whether there is
something wrong with chip.
Replace main board.
OK
OK
OK
OK
Exist
Exist
Error

Midea MKG-400 Specifications

General

Brand	Midea
Model	MKG-400
Category	Air Conditioner
Language	English