Fisher FSAIF-Pro-95AE2 Service Manual page 42

9.2.4 Refrigerant Leakage Detection diagnosis and solution(EC)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
EC
Define the evaporator coil temp.T2 of the compressor just starts
running as Tcool.
In the beginning 5 minutes after the compressor starts up, if T2
＜Tcool－2℃ does not keep continuous 4 seconds and this
situation happens 3 times, the display area will show "EC" and
AC will turn off.
T2 sensor faulty
●
Indoor PCB faulty
●
System problems, such as leakage or blocking.
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