Midea DLCMB - Page 67

Current protec on of compressor
Yes
Replace the electric control box
Check whether the
refrigerant system
is ok
No
Judge 1: Check whether the input
current of the power supply wire
is more than 15A(18K) (For
27K&hyper heat 18K, it is
18.5A.For 36K&hyper heat 27K, it
is 22.5A.For 48K&hyper heat
36K, it is 28A)
is higher than 50
Yes
Judge 2: Check whether the
outdoor ambient temperature
Stop the unit
No
Judge 3: Check whether the
outdoor unit is bad ven
la on
Yes Make the outdoor unit ven ate well
No
Judge 5: The refrigerant pipe is
blocked
Yes
No
Yes
Judge 4: Check whether the
heat exchanger is dirty
Yes
Clean the heat exchanger
Let the refrigerant out, then use the high pressure
nitrogen or refrigerant to blow pipe, vacuumize
and charge the refrigerant again
No
Yes
Trouble is solved
No
Replace outdoor main
board,and check whether the
system can run normally
Replace outdoor main board
DLCM(R/H)B: Service Manual