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Mitsubishi Electric PWFY error codes

Codes

0403Error codeSerial communication error: Serial communication error between the control board and the INV board on the compressor, and between the control board and the Fan board Detail code 01: Between the control board and the INV board Detail code 05: Between the control board and the Fan board
1102Error codeAbnormal discharge air temperature: 1) If a discharge temperature of 115 C [239 F] or higher is detected (first detection), units will stop, go into the 3-minute restart delay mode, and automatically restart after three minutes. 2) If a discharge temperature of 115 C [239 F ] or higher is detected again (second detection) within 30 minutes of the first stoppage of the units as described above, units will stop, go into the 3 minute restart delay mode, and automatically restart after three minutes. 3) If a discharge temperature of 1
1301Error codeAbnormal low pressure: When starting the compressor from Stop Mode for the first time if low pressure reads 0.098MPa [14psi] immediately before start-up, the operation immediately stops.
1302Error codeAbnormal high pressure 1: 1) If a pressure of 3.23MPa [468 psi ] or higher is detected during operation, units will stop, go into the 3 minute restart delay mode, and automatically restart after three minutes. 2) If a pressure of 3.23MPa [468 psi ] or higher is detected again (second detection) within 30 minutes of the first stoppage of the units, units will stop, go into the 3 minute restart delay mode, and automatically restart after three minutes.
2000Error codePump interlock error (BU only): Preliminary pump interlock error is detected when the pump interlock circuit becomes open while the units are stopped during Thermo-ON. When a preliminary error is detected, units will go into the Thermo-OFF state and into the restart-prevention mode. When the amount of time listed below has elapsed since the time when a given preliminary error was detected, an error code "2000" will be detected, and the units will come to an abnormal stop. DipSW3-10=OFF 9 seconds *1 DipSW3-10=ON 9 minutes and 5 | Flow switch error (AU only): When the water flow rate of the water supply to the unit is the specified rate or less, the flow switch does not detect, and the unit will be stopped.
2134Error codeAbnormal water temperature: In the case of BU and WH, if the value of TH6 becomes equal to or greater than 85°C [185] , units will stop and go into the 3 minute restart delay mode. For a period of thirty minutes after units came to a stop is considered a preliminary error.
2135Error codeWater heat exchanger freeze up: Condition 1 1˚C[34] Both TH22 and TH23 of or below have been detected for three minutes in a mode other than Heating Thermo-ON. -15˚C[5] If PWFY is running in Heating Thermo-ON mode TH22 of or below has been detected for 3 continuous when the defrost cycle starts minutes starting from 2 minutes after the start of the defrost cycle. Condition 2 -15˚C[5] If PWFY is running in a mode other than Heating TH22 of or below has been detected for 3 continuous Thermo-ON mode when the defrost cycle starts
4102Error codeThe L2 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.
4115Error codePower supply signal sync error: The frequency cannot be determined when the power is switched on.
4220Error codeAbnormal bus voltage drop (Detail code 108): If Vdc 200V or less is detected during Inverter operation. (S/W detection) | Bus voltage error (PAM damage) (Detail code 01): PWM circuit error on the INV board is detected. | Abnormal bus voltage rise (Detail code 109): If Vdc 380V is detected during inverter operation. | Converter Fo error (Detail code 121): INV board converter circuit error is detected.
4230Error code
4250Error codeIPM error (Detail code 101): Overcurrent is detected while power module error detection signal is output. | ACCT overcurrent (H/W detection) (Detail code 102): Overcurrent 34.5Apeak or 16Arm and above is detected
5102Error codeTH22 temperature sensor failure (BU, AU): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the outdoor 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 outdoor unit, the outdoor unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperature is within th
5103Error codeTH13, TH23 temperature sensor failure (BU, AU): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the outdoor 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 outdoor unit, the outdoor unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperature is within th
5104Error codeTH11 temperature sensor failure (BU): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the outdoor 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 outdoor unit, the outdoor unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperature is within th
5106Error codeTH6 temperature sensor failure (BU, AU): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the outdoor 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 outdoor unit, the outdoor unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperature is within th
5108Error codeTH8 temperature sensor failure (BU, AU): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the outdoor 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 outdoor unit, the outdoor unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperature is within th
5110Error codeHeat sink failure: When a short or an open of THHS is detected just before or during the inverter operation.
5201Error codeHigh pressure sensor failure (63HS): If the high pressure sensor detects 0.098MPa [14psi] or less during the operation, the outdoor 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. 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. During 3-minute antirestart mode, preliminary errors will be displayed on the LED displ
5202Error codeLow-pressure sensor fault 2. E rror definition and error detection method
5301Error codeACCT sensor short circuit/open circuit: Abnormal value is detected by the ACCT sensor detection circuit immediately before inverter startup. | ACCT sensor fault (Detail code 115): When the formula "output current < 1.5 Arms" remains satisfied for 10 seconds while the inverter is in operation.