Midea MIV V4+ Mini Service Manual page 35

DM12-01.01.05en
2) E2 malfunction
LED indicates E2
Communication malfunction between indoor/outdoor units
Judge 1: Check whether the indoor unit power is on
Judge 2: Check whether the signal wiring is shield
cable or whether the shield cable is grounded
Judge 3: Check whether the signal wiring between
the indoor and outdoor units is wrong polarity?
Judge 4: Check whether the signal wiring between
the indoor and outdoor units is broken?
Indoor or outdoor main board is broken, replace the
main board until the malfunction is disappear
Outdoor units
Yes
Yes
No
No
MIV V4+ Mini DC Inverter R410A (220V, 8 kW)
No
Turn on the indoor unit power
No
Adopt the shield cable/ shield cable
grounded
Yes
Connect the signal wiring correctly
Yes
Replace the broken wiring
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