Mitsubishi Electric PQHY error codes
Codes
- 0403Error codeSerial communication error Refer to section -7-"Inverter: Serial communication error between the main board and the INV board on the compressor, and between the main board and the inverter board Detail code 01: Between the main board and the compressor INV board " under part [4] "Trouble shooting | Serial communication error Refer to section -7- "Inverter: Serial communication error between the main board and the INV board on the compressor, and between the main board and the INV board Detail code 01: Between the main board and the compressor INV board " under part [4] "Trouble shooting
- 1102Error codeAbnormal discharge air temperature: 1.If the discharge temperature of 120°C [248°F] or more is detected during the above operation (the first detection), the heat source unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically. 2.If the discharge temperature of 120°C [248°F] or more is detected again (the second detection) within 30 minutes after the second stop of the heat source unit described above, the mode will be changed to 3-minute restart mode, then the heat source unit will res | Abnormal discharge air temperature: 1.If the discharge temperature of 120 °C[248°F] or more is detected during the above operation (the first detection), the heat source unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically. 2.If the discharge temperature of 120 °C[248°F] or more is detected again (the second detection) within 30 minutes after the second stop of the heat source unit described above, the mode will be changed to 3-minute restart mode, then the heat source unit will res
- 1111Error codeSaturation temp. sensor (TH2): 1.If the saturation temp. 3.If the discharge te
- 1301Error codeAbnormal low pressure: Note 1: The Saturation temp. error is not detected for 3 minutes after the compressor starts. Note 2: When short/open is detected by the sensor TH2 in ten minutes before and after the compressor runs, "1111" will be displayed. When starting the compressor from Stop Mode for the first time if lowpressure reads 0.098MPa [14psi] immediately before start-up, the operation immediately stops.
- 1302Error codeAbnormal high pressure 1 (heat source unit): 1. If the pressure of 3.87MPa [561psi] or higher is detected by the pressure sensor during operation (the first detection), the heat source unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically. 2. | Abnormal high pressure 1 (heat source unit): 1. If the pressure of 3.87MPa[561psi] or higher is detected by the pressure sensor during operation (the first detection), the heat source unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically. 2.
- 1500Error codeRefrigerant overcharge: An error can be detected by the discharge temperature superheat. 1) If the formula "TdSH 10°C [18°F]" is satisfied during operation (first detection), the heat source unit stops, goes into the 3minute restart mode, and starts up in three minutes. 2) If the formula "TdSH 10°C [18°F]" is satisfied again within 30 minutes of the first stoppage of the heat source unit (second detection), the unit comes to an abnormal stop, and the error code "1500" appears. 3) If the formula "TdSH 10°C [18°F]" is sa
- 1501Error codeRefrigerant shortage: 2.If the liquid level of an accumulator AL=2 (overflow level) is detected again within 30 minutes after first stop of the heat source unit (the second detection), the heat source unit will make an error stop, and the error code "1500" is displayed. 1.If the shell temperature sensor at compressor (TH10) detects 85°C [185°F] or more for 60 minutes in a low during the operation (the first detection), the compressor stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes a
- 2000Error codePump interlock error: 1) This error is detected by the pump interlock circuit (TB8 3-4). 2) If it is detected that the pump interlock circuit (TB8 3-4) is open (first detection) during operation or immediately before startup, the heat source unit stops and goes into the 10-minute restart delay mode. 3) If the pump interlock circuit (TB8 3-4) has remained open for continuous 10 minutes (second detection) since the first stoppage of the heat source unit, the unit will make an abnormal stop, and the error code "2000" ap
- 2134Error codeAbnormal water temperature: 1. If water inlet temperature of 5˚C or below or 50˚C or above is detected (first detection) during operation, the heat source unit comes to a stop, goes into the 3minute restart prevention mode, and restarts in 3 minutes. 2. If water inlet temperature of 5˚C or below or 50˚C or above is detected again (second detection) within 30 minutes of the first occurrence (as described under item 1 above), the unit comes to an abnormal stop and code “2134” is displayed.
- 2135Error codeWater heat exchanger freezing: 1.If the following conditions are met (1st time) during the operation, the heat source unit comes to a stop, goes into 3-min. [Conditions] Detection of the temperature of 3°C[37°F] or below by the water heat exchanger outlet pipe sensor (TH9), or the detection of the compressor frequency of lower than the minimum frequency 20Hz +10 and the fifteen continuous minutes of evaporating temperature Te detection of higher than -10°C [14 °F] . 2 | Water heat exchanger freezing: 1.If the following conditions are met during (1st time) the operation, the heat source unit comes to a stop, goes into 3-min. [Conditions] Detection of the temperature of 3°C[37°F] or below by the water heat exchanger outlet pipe sensor (TH9), or the detection of the compressor frequency of lower than the minimum frequency 20Hz +10 and the fifteen continuous minutes of evaporating temperature Te detection of higher than -10°C [14 °F] . 2
- 2500Error codeWater leakage: Detection of water immersion of drain sensor while the drain pump is stopped
- 2502Error codeDrain pump failure (The error code blinks on the indoor unit in trouble.) Drain pump failure (The error code blinks on all the indoor units in the system with one indoor unit.): When the drain sensor detects water or its tip becomes immersed in water during drain pump operation. When the drain sensor detects water or its tip becomes immersed in water during drain pump operation on stopping indoor units. | Drain pump failure (The error code blinks on the indoor unit in trouble.) Drain pump failure (The error code blinks on all the indoor units in the system): When the drain sensor detects water or its tip becomes immersed in water during drain pump operation. When the drain sensor detects water or its tip becomes immersed in water during drain pump operation on stopping indoor units.
- 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
- 2600Error codeWater leakage: [194°F] or higher Open : detectable at -40°C [-40°F] or lower - Water such
- 2601Error codeWater supply cutoff 2. Cause, check method and remedy
- 4102Error codeThe L3 phase current is outside of the specified range. The open phase of the power supply may not always be detected if a power voltage from another circuit is applied.
- 4103Error codeReverse 1.When phase/open phase 2.The: turning on the power, the operation cannot be started because of the open phase of one of the power lines (R, S, T). operation cannot be started because of the reserve phase of one of the power lines (R, S, T).
- 4106Error code<Transmission power supply fault error detail FF (Heat source unit)>: Transmission power output failure
- 4115Error codePower supply sync signal abnormality: The frequency cannot be determined when the power is switched on. (The power supply’s frequency cannot be detected. The outdoor fan cannot be controlled by phase control.)
- 4116Error codeFan rotation speed abnormality Motor abnormality: [PKFY-AM only] 1.If the fan rotation speed is detected to 180rpm or lower, or 2000rpm or more during the fan operation in the indoor unit, the unit stops once, turns to anti-restart mode for 3 minutes, and makes fan to stop for 30 seconds. 2.If the fan rotation speed is detected to 180rpm or lower, or 2000rpm or more again when the restart operation after 30 seconds since the fan stops, the unit makes an error stop (fan also stops), and the error code "4116" will appear.
- 4200Error codeVDC sensor/ Circuit failure: [LOSSNAY only] 1.The motor keep running even if the power is OFF. 2.The thermal overload relay is ON. (Only for the three-phase model) If Vdc 150V or less or 400V or more is detected before Inverter operation
- 4220Error codeBus voltage drop (Detail code 108) Bus voltage rise (Detail code 109) Abnormal VDC (Detail code 110) Refer to section -7-"Inverter: If Vdc 150V or less is de- (1) tected during Inverter operation. (S/W detection) (2) (3) (4) (5) If Vdc 425V or more is (1) detected during inverter operation. (2) Same Bus voltage abnormality If Vdc 400V or more or Vdc 160V or and less is detected. (H/W detection) " under part [4] "Trouble shooting | Logic error (Detail code No.111): If only the H/W error logic circuit operates, and no identifiable error is detected. | Bus voltage drop (Detail code 108) Bus voltage rise (Detail code 109) Abnormal VDC (Detail code 110) Refer to section -7- "Inverter: If Vdc 150V or less is detected during Inverter operation. (S/W detection) If Vdc 425V or more is detected during inverter operation. Bus voltage abnormality If Vdc 400V or more or Vdc 160V or less is detected. (H/W detection) " under part [4] "Trouble
- 4230Error code(H/W detection) If only the H/W error logic circuit operates, and no identifiable error is detected. <In the case of 4230> When the heat sink temperature (THHS1) 95˚C is detected. “ the inverter, refer to 7. Inverter and
- 4240Error codeOverload protection Refer to section -7-"Inverter: When the greater output current (Iac) than the Imax (Arms), or THHS of more than 90 °C [194°F] is detected for 10 minutes in a row. Imax P72 model 40 Arms P96 model 50 Arms " under part [4] "Trouble shooting | Overload protection Refer to section -7- "Inverter: When the greater output current (Iac) than the Imax (Arms), or THHS of more than 90°C [194°F] is detected for 10 minutes in a row. Imax P72 model 40 Arms P96 model 50 Arms " under part [4] "Trouble shooting
- 4250Error codeIPM error (Detail code 101) ACCT overcurrent breaker trip (Detail code 102) DCCT overcurrent breaker trip (Detail code 103) Overcurrent breaker trip (Detail code 106,107) IPM short/ grounding fault (Detail code 104) Overcurrent error due to short-circuited motor (Detail code105): When an error signal of IPM is detected When overcurrent break (150 Apeak or 60 Arms) is detected by the current sensor. When IPM short damage or grounding on the load side is detected just before starting the inverter. When a short is detected on the compressor or the fan motor just before the inverter operation. | IPM error (Detail code 101) ACCT overcurrent breaker trip (Detail code 102) DCCT overcurrent breaker trip (Detail code 103) Overcurrent breaking (Detail code 106,107) IPM short/ grounding fault (Detail code No.104) Overcurrent error due to short-circuited motor (Detail code No.105): When an error signal of IPM is detected When overcurrent break (150 Apeak or 60 Arms) is detected by the current sensor. When IPM short damage or grounding on the load side is detected just before starting the inverter. When a short is detected on the compressor or the fan motor just before the inverter operation.
- 4260Error codeCooling fan abnormality: When the DC bus current (DCCT) 200A or more is detected When the DC bus current abnormality VDC 350V or more or VDC 190V or less is detected When the heat sink temperature (THHS1) 60°C [140°F] or more is detected for 10 or more minutes at inverter startup
- 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 heat source unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the heat source unit runs normally), the heat source unit makes an error stop. During heating operation During cooling operation for 3 minutes after the co
- 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 heat source unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the heat source unit runs normally), the heat source unit makes an error stop. During heating operation During cooling operation for 3 minutes after the co | HIC bypass circuit outlet temperature sensor (TH2) fault (Heat source unit): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperatur
- 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 heat source unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the heat source unit runs normally), the heat source unit makes an error stop. During heating operation During cooling operation for 3 minutes after the co | Heat exchanger outlet temperature sensor (TH3) fault (Heat source unit): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperatur
- 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 heat source unit turns to anti-restart mode for 3 minutes. When the error is not restored after 3 minutes (if restored, the heat source unit runs normally), the heat source unit makes an error stop. During heating operation During cooling operation for 3 minutes after the co | Discharge temperature sensor (TH4) fault (Heat source unit): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperatur
- 5105Error codeAccumulator inlet temperature sensor (TH5) fault (Heat source unit): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperatur
- 5106Error codeHIC circuit outlet temperature sensor (TH6) fault (Heat source unit): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperatur
- 5107Error codeWater inlet temperature sensor (TH7) fault (Heat source unit): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperatur
- 5108Error codeWater outlet temperature sensor (TH8) fault (Heat source unit): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperatur
- 5109Error codeOutlet water temperature (TH9): (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 | Outlet water temperature (TH9): heat source unit stops, turns to anti-restart mode for 3 minutes
- 5110Error code01: Compressor INV side Refer to section -7- "Inverter Error Code: When a short or an open of THHS is detected just before or during the inverter operation. " under part [4] "Trouble shooting Error definition and error detection method | Heat sink failure Detail code No. 01: Compressor INV side Refer to section - 7- "Inverter Temperature sensor failure Error Code: When a short or an open of THHS is detected just before or during the inverter operation. " under part [4] "Trouble shooting
- 5111Error codeLiquid inlet temperature sensor (TH11) fault (BC controller): If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11, TH12, TH15, or TH16) is detected during operation, the unit makes an error stop, and an error code "5111," "5112," "5115," or "5116" appears on the display. Detection of a shortor open-circuit as described above is suspended for 3 minutes after the operation mode is changed.
- 5112Error codeInverter cooling heat exchanger (THINV): minutes when the detected temperature is within the normal range. 3.When a short or an open is detected again (the third detection) after the previous restart of the heat source unit, the heat source unit makes an error stop. 4.When a short or an open of the thermistor is detected just before the restart of the heat source unit, the heat source unit makes an error stop, and the error code "5101", "5105" , "5106" , "5107" , "5108" , "5109" or "5112" will appear. 5.During 3-minute antirestart mode | Inverter cooling heat exchanger (THINV): and restarts when the detected temperature of the thermistor 2.When a short or an open is detected again (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperature is within the normal range. 3.When a short or an open is detected again (the third detection) after the previous restart of the heat source unit, the heat source unit makes an error stop. 4.When a | Bypass outlet (TH12): an open (low temperature inlet) of the thermistor is detected
- 5115Error codeLEV3 outlet temperature sensor (TH15) fault (BC controller): If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11, TH12, TH15, or TH16) is detected during operation, the unit makes an error stop, and an error code "5111," "5112," "5115," or "5116" appears on the display. Detection of a shortor open-circuit as described above is suspended for 3 minutes after the operation mode is changed.
- 5116Error codeLEV3 inlet temperature sensor (TH16) fault (BC controller): If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11, TH12, TH15, or TH16) is detected during operation, the unit makes an error stop, and an error code "5111," "5112," "5115," or "5116" appears on the display. Detection of a shortor open-circuit as described above is suspended for 3 minutes after the operation mode is changed.
- 5201Error codeHigh pressure sensor (heat source unit): 1.If the high pressure sensor detects 0.098MPa [14psi] or less during the operation, the heat source unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes when the detected high pressure sensor is 0.098MPa [14psi] or more. 2.If the high pressure sensor detects 0.098MPa [14psi] or less just before the restart, the heat source unit makes an error stop, and the error code "5201" will appear. 3.During 3-minute antirestart mode, preliminary errors will be displayed o | High pressure sensor (heat source unit): 1. If the high pressure sensor detects 0.098MPa [14psi] or less during the operation, the heat source unit stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes when the detected high pressure sensor is 0.098MPa [14psi] or more. 2. If the high pressure sensor detects 0.098MPa [14psi] or less just before the restart, the heat source unit makes an error stop, and the error code "5201" will appear. 3. During 3-minute anti-restart mode, preliminary errors will be displaye | Liquid side: When the pressure of 4.06MPa [589psi] or more
- 5203Error codeIntermediate pressure sensor fault (BC controller PS3): When a pressure sensor reading of 4.06 MPa [589 psi] or above is detected, error codes "5201" and "5203" will appear. The unit will continue its operation by using other sensors as a backup.
- 5301Error codeACCT sensor circuit failure (Detail code 117) DCCT sensor circuit failure (Detail code 118) ACCT sensor failure (Detail code 115) DCCT sensor failure (Detail code 116) IPM open/Disconnected ACCT connector (Detail code 119) ACCT faulty wiring detection (Detail code 120) Refer to section -7- "Inverter: When an error value is detected with the ACCT detection circuit just before the inverter starts When an error value is detected with the DCCT detection circuit just before the inverter starts When the effective output current between -2 Arms and 2 Arms is detected during inverter operation When the bus current less than 18 Apeak is detected at startup When IPM open damage or disconnected CNCT2 is not detected just before INV starts (Sufficient current is not detected just before startup) ACCT se | ACCT sensor circuit failure (Detail code 117) DCCT sensor circuit failure (Detail code 118) ACCT sensor failure (Detail code 115) DCCT sensor failure (Detail code 116) Preliminary IPM open/Disconnected ACCT connector (Detail code119) ACCT faulty wiring detection (Detail code120) Refer to section - 7- "Inverter: When an error value is detected with the ACCT detection circuit just before the inverter starts When an error value is detected with the DCCT detection circuit just before the inverter starts When the effective output current between -2 Arms and 2 Arms is detected during inverter operation When the bus current of less than 18 Apeak is detected at startup (6Hz) When IPM open damag
- 5701Error codeLoose float switch connector: Detection of the disconnected float switch (open-phase condition) during operation
- 6201Error codeRemote controller board fault (nonvolatile memory error): This error is detected when the data cannot be read out from the built-in nonvolatile memory on the remote controller.
- 6202Error codeRemote controller board fault (clock IC error): This error is detected when the built-in clock on the remote controller is not properly functioning.
- 6600Error codeAddress overlaps (1) The error is detected when the same address is transmitted from different units. Note: The address/attribute (2) appeared on the display on the remote controller indicates the controller where an error occurred.
- 6601Error codeUnset polarity The error detected when transmission processor cannot distinguish the polarities of the M-NET transmission line. tion method
- 6602Error codeTransmission ware error Although mitted by cessor, transmission The address/attribute peared the dicates where curred.: processor hard- (1) When transmission mitted "0" was surely transdetected. the transmission pro- (2) Grounding "1" is displayed on the (3) When line. units, connected ap- (4) When on the display on nected remote controller infemale the controller (5) Controller an error oc- (6) When line (7) Voltage of grouped the Check Single-heat Investigation transmission | Transmission processor hardware error Although "0" was surely transmitted by the transmission cessor, "1" is displayed on transmission line Note: The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.
- 6603Error codeTransmission circuit bus-busy 1.Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy 2.Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise Note: The address/attribute appeared on the display on the remote controller indicates the controller where an error occurred.