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Mitsubishi Electric PEFY error codes

Codes

0403Error codeSerial communication error (Indoor unit): Serial communication cannot be established between the Indoor controller board and the INV board.
1521Error codeRefrigerant leakage Abnormal if refrigerant leakage is detected by a refrigerant sensor.
1522Error codeRefrigerant leakage / Refrigerant sensor error / Communication error is applied to the connector connector CNMF with unit fan does not run. board fuse (F1) (F2) check No normal? Yes check connector (CNMF) Yes failure? No the indoor board. OK operation. END Fail fan motor. power to the unit is turned Indoor control board vary in different systems. on address setting a combinat
2500Error codeDrain sensor submergence (Models with a drain sensor): 1) If an immersion of the drain sensor in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage. While this error is being detected, humidifier output cannot be turned on.(Applicable to the units manufactured in or after October 2006) 2) If the immersion of the sensor in the water is detected four consecutive times at an hour interval, this is considered water leakage, a | Drain sensor submergence (Models with a float switch): 1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage. While this error is being detected, humidifier output cannot be turned on. 2) If the drain pump turns on within one hour after preliminary water leakage is detected and the above-mentioned condition is detected two consecutive times, water leakage error water leakage is detec
2502Error codeDrain pump fault (Models with a drain sensor): 1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water. This condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode. 2) If another episode of the above condition is detected during the preliminary error, this is considered a drain pump error, and "2502" appears on the monitor. 3) This error is always detected while the drain pump is in operation. 4) The following cr | Drain pump fault (Models with a float switch): 1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch. Submergence of the sensor When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water. Sensor in the air When it is detected that the float switch has been OFF for 15 seconds, it is interpreted that the sensor tip is not immersed in water. 2) If it is detected that the float switch has been ON for 3 minutes after the immersion of t
2503Error codeDrain sensor (Thd) fault: If the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode. If another episode of the above condition is detected during the preliminary error, this is considered a drain sensor error.(If the short or open circuit of the thermistor is no longer detected, normal operation will be restored in 3 minutes.) This error is detected when one of the following conditions
4109Error codeIndoor unit fan operation error: 1) Connector CN28 has remained open-circuited for 100 consecutive secondsduring operation.
4116Error codeRPM error/Motor error: LOSSNAY The motor keep running even if the power is OFF. The thermal overload relay is ON. (Only for the three-phase model) Indoor unit If detected less than 180rpm or more than 2000rpm, the indoor unit will restart and keep running for 3 minutes.If detected again, the display will appear.
4225Error codeAbnormal bus voltage drop (Indoor unit): If Vdc 130V or less is detected during Inverter operation. (S/W detection) | Abnormal bus voltage rise (Indoor unit): If Vdc 425V is detected during inverter operation. | Logic error (Indoor unit): H/W error If only the H/W error logic circuit operates, and no identifiable error is detected.
4235Error codeHeatsink overheat protection (Indoor unit): When the heat sink temperature (THHS) remains at or above 85°C [185°F] is detected.
4255Error codeIPM error (Indoor unit): IPM error signal is detected. | Instantaneous overcurrent (Indoor unit) Overcurrent (Indoor unit): Overcurrent 18 Arms and above is detected by the current sensor. | Overcurrent error due to short-circuited motor (Indoor unit): When a short is detected on the load side just before starting the inverter operation. | Position detection error at startup (Indoor unit): Position error is detected by the hall sensor at inverter startup. | Position detection error during operation (Indoor unit): Position error is detected by the hall sensor during operation.
5101Error codeReturn air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit): If a short or an open is detected during thermostat ON, the outdoor unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the outdoor unit runs normally), the outdoor unit makes an error stop. During heating operation During cooling operation for 3 minutes after the compressor t
5102Error codePipe temperature sensor (TH22) fault (Indoor unit) Pipe temperature sensor (TH2) fault (OA processing unit): If a short or an open is detected during thermostat ON, the outdoor unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the outdoor unit runs normally), the outdoor unit makes an error stop. During heating operation During cooling operation for 3 minutes after the compressor t
5103Error codeGas-side pipe temperature sensor (TH23) fault (Indoor unit) Gas-side pipe temperature sensor (TH3) fault (OA processing unit): If a short or an open is detected during thermostat ON, the outdoor unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the outdoor unit runs normally), the outdoor unit makes an error stop. During heating operation During cooling operation for 3 minutes after the compressor t
5104Error codeIntake air temperature sensor (TH1) fault (OA processing unit) Intake air temperature sensor (TH24) fault (All-fresh (100% outdoor air) type indoor unit): If a short or an open is detected during thermostat ON, the outdoor unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the outdoor unit runs normally), the outdoor unit makes an error stop. During heating operation During cooling operation for 3 minutes after the compressor t
5110Error codeHeatsink temperature sensor (THHS) fault (Indoor unit): When a short or an open of THHS is detected just before or during the inverter operation.
5305Error codeACCT sensor circuit fault (Indoor unit): When abnormal value is detected by the ACCT detection circuit immediately before the inverter starts | Open-circuited IPM/Loose ACCT connector (Indoor unit): ACCT sensor detected that not enough current is available.
5558Error codeRefrigerant sensor error Abnormal if refrigerant sensor cannot detect errors normally.
5701Error codeLoose float switch connector: Detection of the disconnected float switch (open-phase condition) during operation
6600Error codeAddress overlap: An error in which signals from more than one indoor units with the same address are received The address and attribute that appear on the remote controller indicate the controller that detected the error.
6602Error codeTransmission processor hardware error: Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.
6603Error codeTransmission line bus busy error: Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.
6606Error codeCommunication error between device and transmission processors: Communication error between the main microcomputer on the indoor unit board and the microcomputer for transmission The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.
6608Error codeNo response error: When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detected. When the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side. The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.
6831Error codeMA controller signal reception error (No signal reception): Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes.
6832Error codeMA remote controller signal transmission error (Synchronization error): MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals Indoor unit : 3 minutes Remote controller : 6 seconds
6833Error codeMA remote controller signal transmission error (Hardware error): Communication between the MA remote controller and the indoor unit is not done properly. An error occurs when the transmitted data and the received data differ for 30 times in a row.
6834Error codeMA controller signal reception error (Start bit detection error): Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 2 minutes.
7111Error codeRemote controller sensor fault: This error occurs when the temperature data is not sent although the remote controller sensor is specified. 3. ing unit ME compact remote controller (mounted type)) is used and the remote controller sensor for the indoor