Define the evaporator coil temperatureT2 of the compressor just
starts running as Tcool.
In the beginning 8 minutes after the compressor starts up, if T2
＜Tcool－2℃ does not keep continuous 4 seconds and
compressor running frequency higher than 50Hz does not keep
continuous 3 minutes, and this situation happens 3 times, the
display area will show “EC” and AC will turn off.
Is there cool air blowing
out from indoor air outlet?
Yes
Yes
Check if T2 sensor is well
fixed. Correct the installation
or replace T2 sensor. Does
the problem remain again?
No
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
No
Shut off the power supply and
turn it on 2 minutes later. Is it
still displaying the error code?
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
Yes
Clear the blocking.
Yes
Is there any block i n g ? (Such as the
capillary or the welded points of the pipes.)
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