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 total capacity of the indoor units has been exceeded or is under the minimum acceptable range. The manual's first action is: “- Check total capacity of the connected indoor units. - Check all field wiring to ensur…
The system detected an incorrect number of wires or pipes. The manual's first action is: “- Check indoor unit connection. - Check for crossed wiring or piping. (Ref. Service Tip #021 Incorrect Wiring)”
Check run unfinished when remote command is input without confirming completion. The manual's first action is: “Check indoor unit number connection. - Power down all indoor units with remote controller, reset dis conn…
Outdoor unit fan motor 2 error when fan rotation speed is below 100 RPMs in 20 seconds after starting. The manual's first action is: “After motor restarts, if same operation within 60 seconds is repeated 3 times in a …
Outdoor unit fan motor error occurs when motor rotation speed is below 100 RPMs in 20 seconds after starting. The manual's first action is: “After fan motor restarts, if the same operation within 60 seconds is repeate…
Compressor Motor Control Error if rotor location is out of phase more than 90 degrees The manual's first action is: “After the compressor restarts, if the same operation is repeated within 40 seconds, the compressor s…
The inverter compressor has stopped due to overcurrent generation after 10 consecutive attempts. The manual's first action is: “The number of generations is reset if the start-up of the compressor succeeds.”
Intake grille error when the micro switch is detected open while running the compressor. The manual's first action is: “-Check limit switch.”
Indoor heat exchanger thermistor error detected by the controller. The manual's first action is: “-Check thermistor resistance value”
The indoor unit cannot receive the signal from the Wired Remote Control for more than 1 minute during normal operation. The manual's first action is: “-Check the connection of terminal between remote control and indoo…
Low pressure error occurs when suction pressure drops below 7.35 PSI for five minutes and repeats five times within two hours. The manual's first action is: “-Check if 3-way valve (gas side) is open. -Checked strainer…
Compressor temperature error occurs when compressor temperature exceeds 236°F (107.8°C) twice in 24 hours. The manual's first action is: “-Check EEV, strainer. (Ref. Service Tip #001-Discharge Temperature Thermistor E…
Discharge temperature error occurs when discharge temperature exceeds 23°F (110°C) twice in 24 hours. The manual's first action is: “-Check if 3-way valve is open. -Check EEV, strainer. (Ref. Service Tip #001-HFI Disc…
The 4-way valve error code indicates the compressor stops when indoor heat exchanger temp minus room temp exceeds 20°F (cooling) or falls below -20°F (heating). The manual lists no action for this code.
Heat sink thermistor error indicates the heat sink temperature thermistor is open or shorted. The manual's first action is: “-Check for erroneous connection or removed connector.”