Troubles And Causes Of Air Conditioner; E3: T1 Evaporator Sensor Malfunction - Midea C Series Technical & Service Manual

Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series

E3: T1 evaporator sensor malfunction

T1 connecting wire between sensor and
Temperature sensor is short-circuited or
Chip fault, or chip foot sheds off, or chip is
inverted. (correct mode is semicircular bent
Main board error: for example, getting wet.

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
Unit does not start
Air flowing normally but
completely can't cooling
Low cooling effect
Low heating effect
13.7.2 Troubles and causes of remote controller
mainboard gets loose.
OK
punctured.
OK
alignment.)
OK
• 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.
• 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.
• Outdoor temperature is lower than
7℃;
• Doors and windows are not completely
closed.
Exist
Reconnect and ensure that the
Exist
Reinstall chip, or install other chip
Error
with same model on the faulty
unit, to check whether there is
something wrong with chip.
Causes
- 39 -
MCAC-UTSM-201606
connection is reliable.
Replace sensor.
OK
Replace main board.
Solution
• Wait for the comeback of
power;
• Switch on the power;
• Replace the fuse;
• Replace the batteries or check
the controller.
• Set the temperature properly.
• 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).
• Use heating device;
• Close doors and windows.