Mitsubishi Electric PFD error codes
Codes
- 0403Error codeSerial transmission abnormality: If serial transmission cannot be established between the MAIN and INV boards.
- 1102Error codeDischarge temperature abnormality (Outdoor unit): 1. When 140˚C or more discharge temperature is detected during operations (the first time), outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts. 2. When 140˚C or more temp. is detected again (the second time) within 30 minutes after stop of outdoor unit, emergency stop is observed with code No. “1102” displayed. 3. When 140˚C or more temp. is detected 30 or more minutes after stop of outdoor unit, the stop is regarded as the first time and the
- 1111Error codeLow pressure saturation temperature sensor abnormality (TH2): 1. When saturation temperature sensor (TH2) or liquid level detecting temperature sensors (TH3, TH4) detects -40˚C or less (the first time) during operations, outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts. 2. When -40˚C or less temp. is detected again (the second time) within 30 minutes after stop of outdoor unit, error stop is observed with code Nos. “1111,” “1112,” or “1113” displayed.
- 1112Error codeLiquid level trouble detecting temperature temperature sensor abnormality (TH4) saturation pressure Low: 3. When -40˚C or less temperature is detected 30 or more minutes after stop of outdoor unit, the stop is regarded as the first time and the process shown in 1. is observed. 4. 30 minutes after stop of outdoor unit is intermittent fault check period with LED displayed. Note: 1. Low press. saturation temperature trouble is not detected for 3 minutes after compressor start, and finish of defrosting operations, and
- 1113Error codeLiquid level detecting temperature sensor abnormality (TH3): during defrosting operations. 2. In the case of short/open of TH2~TH4 sensors before starting of compressor or within 10 minutes after starting of compressor, “1111,” “1112,” or “1113” is displayed too.
- 1301Error codeLow pressure abnoramlity: When starting from the stop mode for the first time, (if at the start of bind power transmission, the end of bind power transmission, and in the mode when the thermostat goes OFF immediately after the remote control goes ON, the following compressor start time is included), if the low pressure pressure sensor before starting is at 0.098MPa, operation stops immediately.
- 1302Error codeHigh pressure fault 1 (Outdoor unit): 1) If the pressure sensor detects a pressure of 3.78 MPa [548 psi] or higher during operation, the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts after 20 seconds. 2) If the pressure sensor detects a pressure of 3.78 MPa [548 psi] or higher again (second detection) within 30 minutes of the first stoppage of the outdoor unit, the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts after 20 seconds.
- 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 outdoor unit stops, goes into the 20second restart delay mode, and automatically restarts after 20 seconds. 2) If the formula "TdSH 10°C [18°F]" is satisfied again within 30 minutes of the fifth stoppage of the outdoor unit (sixth detection), the unit comes to an abnormal stop, and the error code "1500" appears. 3) If the formula "TdSH 10°C [1
- 1501Error codeLacked refrigerant abnormality abnormality refrigerant Insufficient: 1. When the unit condition is as follows, the compressor is stopped (1st detection) and after 3 minutes, the compressor is restarted automatically. 1 F<60Hz and TH10>85°C continuously for 60 minutes. 2 F<60Hz and TH10>95°C continuously for 15 minutes. 3 F 60Hz and TH10>100°C continuously for 60 minutes. 4 F 60Hz and TH10>110°C continuously for 15 minutes. 2. If the temperature rises again as above within 2 hours after the outdoor unit is stopped (2nd detection), an error stop is performed, and t
- 1505Error codeSuction pressure abnormality: 1. Judging that the state when the suction pressure reaches 0MPa during compressor operation, the back-up control by gas bypassing will be conducted.
- 2500Error codeLeakage (water) abnormality: When drain sensor detects flooding during drain pump OFF.
- 2502Error codeDrain pump abnormality: When indirect heater of drain sensor is turned on, rise in temperature is 20 deg. or less (in water) for 40 seconds, compared with the temperature detected before turning on the indirect heater.
- 2503Error codeFloat switch trip: This error is detected if the float switch trips during operation and open-circuit (-40°C [-40°F] below) is detected continuously for 30 seconds. (Normal operation will be resumed in 20 seconds if open-circuit is no longer detected before the 20 seconds have elapsed.)
- 3121Error codeOut-of-range outside air temperature: When the thermistor temperature of -28°C[-18°F] or below has continuously been detected for 3 minutes during heating operation (during compressor operation), the unit makes an error stop and "3121" appears on the display. (Use the OC thermistor temperature to determine when two outdoor units are in operation.) The compressor restarts when the thermistor temperature is -26°C[-15°F] or above (both OC and OS) during error stop.
- 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 code
- 4106Error code<Transmission power supply fault Error detail code FF (Outdoor unit)>: Transmission power output failure
- 4109Error codeFan fault: If the auxiliary relay X4 (for fan fault detection) remains unexcited for a certain period of time, the unit will come to an abnormal stop, and the fan output goes off. Overcurrent breaker trigger value Model name, motor output Preset value P250 model, 3.7kW 7.5A PFD P500 model, 5.5kW 12A
- 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.)
- 4200Error codeVDC sensor/circuit abnormality: 1 If VDC 304 V is detected just before the inverter starts. 2 If VDC 750 V is detected just before starting of and during operation of the inverter.
- 4220Error codeIf Vdc 289V or less is detected during Inverter operation. (S/W detection) | If Vdc 830V is detected during inverter operation. | H/W error If only the H/W error logic circuit operates, and no identifiable error is detected. | When Vdc 160 V is detected just before the inverter operation.
- 4225Error codeAbnormal bus voltage drop (Detail code 108): If Vdc 289V or less is detected during Inverter operation. (S/W detection) | Abnormal bus voltage rise (Detail code 109): If Vdc 830V is detected during inverter operation. | Logic error (Detail code 111): H/W error If only the H/W error logic circuit operates, and no identifiable error is detected. | Low bus voltage at startup (Detail code 131): When Vdc 160 V is detected just before the inverter operation.
- 4230Error codeRadiator panel overheat protection: If the cooling fan stays ON for 5 minutes or longer during inverter operation, and 100°C if THHS is detected.
- 4240Error codeOver loard protection: If IAC 32 Amps is detected continuously for 10 minutes during operation of the inverter after 5 or more seconds have passed since the inverter started.
- 4250Error codeIn the case of 4250 Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board. In the case of 4255 IPM error signal is detected. | Instantaneous overcurrent (Detail code 106) Overcurrent (Detail code 107): P250 model Overcurrent 94 Apeak or 22 Arms and above is detected by the current sensor. | When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter. | When a short is detected on the load side just before starting the inverter operation.
- 4255Error codeIPM error (Detail code 101): In the case of 4250 Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board. In the case of 4255 IPM error signal is detected. | Overcurrent error due to short-circuited motor (Detail code 105): When a short is detected on the load side just before starting the inverter operation.
- 4260Error codeCooling fan abnormality: If the heat sink temperature (THHS) 100°C for 20 minutes or longer just before the inverter starts.
- 5101Error codeReturn air temperature sensor (TH21) fault (Indoor unit): If a shortor open-circuit of the sensor is detected during Thermo-ON, the unit goes into the 20-second restart delay mode. If normal operation is not resumed in 20 seconds, the unit will come to an abnormal stop. ∗During heating operation ∗During cooling operation for 3 minutes after the compressor turns on.
- 5102Error codePipe temperature sensor (TH22) fault (Indoor unit): If a shortor open-circuit of the sensor is detected during Thermo-ON, the unit goes into the 20-second restart delay mode. If normal operation is not resumed in 20 seconds, the unit will come to an abnormal stop. ∗During heating operation ∗During cooling operation for 3 minutes after the compressor turns on. | HIC bypass circuit outlet temperature sensor (TH2) fault (Outdoor unit): If a shorted-circuited (high temperature intake) or an open-circuited thermistor (low temperature intake) is detected (first detection), the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts if the thermistor temperature reading is within the normal range at the end of the restart delay mode. If a shortor open-circuited thermistor is detected again (second detection) after restart, the outdoor unit stops again, goes into the 20-second restart delay mode
- 5103Error codeGas-side pipe temperature sensor (TH23) fault (Indoor unit): If a shortor open-circuit of the sensor is detected during Thermo-ON, the unit goes into the 20-second restart delay mode. If normal operation is not resumed in 20 seconds, the unit will come to an abnormal stop. During heating operation During cooling operation for 3 minutes after the compressor turns on. | Heat exchanger outlet temperature sensor (TH3) fault (Outdoor unit): If a shorted-circuited (high temperature intake) or an open-circuited thermistor (low temperature intake) is detected (first detection), the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts if the thermistor temperature reading is within the normal range at the end of the restart delay mode. If a shortor open-circuited thermistor is detected again (second detection) after restart, the outdoor unit stops again, goes into the 20-second restart delay mode
- 5104Error codeSupply air temperature sensor fault (TH24) (Indoor unit): If a shortor open-circuit of the sensor is detected during Thermo-ON, the unit goes into the 20-second restart delay mode. If normal operation is not resumed in 20 seconds, the unit will come to an abnormal stop. ∗During heating operation ∗During cooling operation for 3 minutes after the compressor turns on. | Discharge temperature sensor (TH4) fault (Outdoor unit): If a shorted-circuited (high temperature intake) or an open-circuited thermistor (low temperature intake) is detected (first detection), the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts if the thermistor temperature reading is within the normal range at the end of the restart delay mode. If a shortor open-circuited thermistor is detected again (second detection) after restart, the outdoor unit stops again, goes into the 20-second restart delay mode
- 5105Error codeAccumulator inlet temperature sensor (TH5) fault (Outdoor unit): If a shorted-circuited (high temperature intake) or an open-circuited thermistor (low temperature intake) is detected (first detection), the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts if the thermistor temperature reading is within the normal range at the end of the restart delay mode. If a shortor open-circuited thermistor is detected again (second detection) after restart, the outdoor unit stops again, goes into the 20-second restart delay mode
- 5106Error codeHIC circuit outlet temperature sensor (TH6) fault (Outdoor unit): If a shorted-circuited (high temperature intake) or an open-circuited thermistor (low temperature intake) is detected (first detection), the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts if the thermistor temperature reading is within the normal range at the end of the restart delay mode. If a shortor open-circuited thermistor is detected again (second detection) after restart, the outdoor unit stops again, goes into the 20-second restart delay mode
- 5107Error codeOutside temperature sensor (TH7) fault (Outdoor unit): If a shorted-circuited (high temperature intake) or an open-circuited thermistor (low temperature intake) is detected (first detection), the outdoor unit stops, goes into the 20-second restart delay mode, and automatically restarts if the thermistor temperature reading is within the normal range at the end of the restart delay mode. If a shortor open-circuited thermistor is detected again (second detection) after restart, the outdoor unit stops again, goes into the 20-second restart delay mode
- 5110Error codeHeatsink temperature sensor (THHS) fault (Detail code 01): When a short or an open of THHS is detected just before or during the inverter operation.
- 5201Error codeHigh-pressure sensor fault (63HS1): If the high-pressure sensor detects a pressure of 0.098MPa [14psi] or below during operation, the outdoor unit stops, goes into the 20-second restart delay mode, and restarts if the pressure reaches above 0.098MPa [14psi] at the end of the restart delay mode. If the high pressure sensor detects 0.098MPa [14psi] or less just before the restart, the outdoor unit makes an error stop, and the error code "5201" will appear. When the unit is in the 20-second restart delay mode, a preliminary error
- 5301Error codeIAC sensor/ circuit abnormality Compressor-input phase U: 1 If IAC 3 Amps is detected just before the inverter starts, or If IAC 3 Amps is detected during inverter operation after 5 seconds has passed since the inverter started when the INV board’s SW1-1 is OFF. [Inverter error detail : 6] 2 If the current sensor (ACCT) miss-wiring is detected during inverter operation. [Inverter error detail : 13] ACCT_U IPM-output phase U Red | 1 IAC sensor/ circuit abnormality 2: If IAC 3 Amps is detected before the inverter starts, If IAC 3 Amps is detected ing inverter operation seconds has passed inverter started when board’s SW1-1 is OFF. [Inverter error detail If the current sensor miss-wiring is detected inverter operation. [Inverter error detail
- 6600Error codeMultiple address Transmission from same address Note: The address/attribute shown on controller controller detected: error units with the is detected. 2) remote indicates the which has error.
- 6601Error codePolarity setting error: The error detected when transmission processor cannot distinguish the polarities of the M-NET transmission line.
- 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.
- 6607Error codeSystem composition system refrigerant Single (1): No ACK error Generating Display of Detecting unit address trouble method 1 Outdoor Remote No reply unit (OC) controller (ACK) at (RC) IC transmission to OC 2 Indoor Remote No reply unit (IC) controller (ACK) at (RC) RC transmission to IC 3 Remote Remote No reply controller controller (ACK) at IC (RC) (RC) transmission to RC | (continued) System composition refrigerants plural using system operation Group (2): No ACK error Generating Display of Detecting unit address trouble method 1 Outdoor Remote No reply unit (OC) control- (ACK) at ler (RC) BC transmission to OC 2 Indoor Remote No reply unit (IC) control- (ACK) at ler (RC) RC transmission to IC 3 Remote Remote No reply controller control- (ACK) at IC (RC) ler (RC) transmission to RC | (continued) System composition (MELANS) controller system with system Connecting (3): No ACK error Generating Display of Detecting unit address trouble method 1 Outdoor Remote No reply unit (OC) controller (ACK) at (RC) IC transmission to OC 2 Indoor Remote No reply unit (IC) controller (ACK) at (RC) transmission of SC to IC 3 Remote Remote No reply controller controller (ACK) at (RC) (RC) transmission of IC to RC No reply (ACK) at transmission of MELANS to RC | (continued) System composition (MELANS) controller system with system Connecting (3) system with relation No: No ACK error Generating Display of Detecting unit address trouble method 5 System Remote No reply controller controller (ACK)
- 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.
- 7100Error codeTotal capacity error Total capacity of indoor units in the same refrigerant system exceeds limitations. Trouble source: Outdoor unit
- 7101Error codeCapacity code error Error display at erroneous connection of Indoor unit of which model name can not be connected. Trouble source : Outdoor unit Indoor unit