AFTER THE COMPRESSOR WORKS IN HIGH FREQUENCY FOR 9 MINUTES, IF THE TEMPERATURE OF THE INDOOR UNIT EVAPORATOR AND THE OUTDOOR UNIT CONDENSER ONLY HAVE VERY MINIMAL VARIATION COMPARED TO PREVIOUS LEVELS BUT THE COMPRESSOR DISCHARGE TEMPERATURE IS ON A HIGH LEVEL, THE AC UNIT WILL DISPLAY THE FY ERROR CODE.
REPAIR:
1) CHECK THE PIPE CONNECTORS FOR ANY GAS LEAKAGE. IF YES, PLEASE FIX IT
2) CHECK IF ANY OTHER PLACE HAS A GAS LEAKAGE. PLEASE CHECK AND FIX IT IF NECESSARY