Error, fault and alarm codes of products - what each code means, its causes and what to do - read from the manufacturers’ manuals, with the manual page each answer comes from.
The system detected a connection error with the indoor unit. The manual's first action is: “5 flashes”
Expansion valve error is displayed when the 3-way valve temperature thermistor has an error. The manual's first action is: “3 flashes”
The system detected an error in the 2-way valve temperature sensor. The manual's first action is: “3 flashes”
Communication error (inverter to multi controller) The manual's first action is: “8 flashes”
Outdoor unit fan error detected due to abnormal current value or motor not locked. The manual's first action is: “-Check DC 15V between black & white wire. Voltage not present. -Controller PCB defective.”
The compressor does not operate due to synchronization or position errors. The manual's first action is: “-Check if 2-way valve or 3-way valve are open. Check the compressor. (Wiring resistance value, loose wire). -Ch…
Active filter module (AFM) error (Second time) The manual's first action is: “2 flashes”
Current transformer error when current drops to zero amps within one minute of compressor start. The manual's first action is: “-Check if CT wire is open. (Ref. Service Manual for schematic on each model) -Controller …
Abnormal current value at the IPM is detected. The manual's first action is: “-Check if outdoor fan is defective (does not rotate). -JPM/Controller PCB defective.”
Pressure switch error indicates a high pressure switch issue. The manual's first action is: “8 flashes”
Compressor temperature sensor error The manual's first action is: “8 flashes”
The system has detected excessive outdoor pressure, causing a permanent stop. The manual's first action is: “7 flashes”
Outdoor unit doesn't accept the signal from the indoor unit The manual's first action is: “-Reset power. If error persists check wiring from panel to condenser, condenser to evaporator. Check for correct voltage at pa…
Discharge pipe temperature sensor error detected. The manual's first action is: “-Check thermistor for open or short. (Ref. Thermistor Resistance Chart) -Controller PCB defective.”
Outdoor temperature sensor error The manual lists no action for this code.