MCAC-UTSM-201606 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series
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13.7 Trouble-shooting
T2 evaporator sensor malfunction
E2
T1 evaporator sensor malfunction
Water-level alarm malfunction
E7
EEPROM communication error
EE: W ater-level alarm malfunction
Water-level switch connecting wire
between switch and main board gets loose.
There is something wrong with the water-
level switch.
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 switch.
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
E2: T2 evaporator sensor malfunction
T2 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