Midea MIV V4+ Mini Service Manual page 30

MIV V4+ Mini DC Inverter R410A (220V, 8 kW)
② Indoor unit's temp. Sensor malfunction
Indoor
Sensor malfunction
T1, T2 or T2B Connecting wire
between sensor and mainboard
gets loose
Temperature
short-circuited or punctured
Chip fault, or chip foot sheds off, or chip is
inverted (correct mode is semicircular bent
alignment)
Mainboard error:
For example,
getting wet
Caution: There are three temp. sensors in indoor unit, i.e. T1, T2 and T2B, of which fault in any one will cause operation light
flashing and report error.
28
unit's temp.
Exist
OK
OK
Exist
sensor is
OK
Reconnect and ensure
that the connection is
reliable.
Replace sensor
Error
Reinstall chip, or install other chip
with same model on the faulty unit,
to check
something wrong with chip.
OK
Replace
mainboard
whether there is
DM12-01.01.05en
Outdoor units