Mitsubishi Electric CMB 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 de
- 1112Error codeLiquid level detecting temperature sensor trouble abnormality (TH4) temperature saturation pressure: sensor (TH2) or liquid level detecting temperature sensors (TH3, TH4) detects -40˚C or less (the first time) during operations, heat source unit stops once, mode is changed to restart mode after 3 minutes, then the heat source unit restarts. 2. When -40˚C or less temp. is detected again (the second time) within 30 minutes after stop of heat source unit, error stop is observed with code Nos. “1111,” “1112,” or “1113” displayed. 3. When -40˚C or less temperature is detected 30 or more minutes afte
- 1113Error codeLiquid level detecting Low temperature sensor abnormality (TH3): Note: 1. Low press. saturation temperature trouble is not detected for 3 minutes after compressor start, and finish of defrosting operations, and 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 1.0 kg/cm2G (0.098MPa), operation stops immediately.
- 1302Error codeHigh pressure fault 1 (Outdoor unit): 1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the outdoor stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.
- 1368Error codeLiquid side controller) (BC abnoramlity pressure: When liquid side press, sensor, gas side pressure sensor, or intermediate pressure sensor detects 30kg/cm2G (2.94MPa) or more, error stop is observed with code No. “1368”, or “1370” displayed.
- 1370Error codeIntermediHigh ate side
- 1500Error codeOverchanged refrigerant abnormality: 1. 2. When liquid level of accumulator reaches AL=2 (overflow level) and Td-Tc 20 deg again (the second time), error stop is observed with code No.“1500” displayed. 3. When liquid level of accumulator reaches AL=2 (overflow level) and Td-Tc 20 deg 30 or more minutes after stop of h
- 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. PU(H)Y-200·250YMF-B I Cooling mode 1 TH1>120°C F<60Hz, TH1-Tc>60deg I Heating mode 1 TH1>100°C, F<60Hz, TH1-Tc>55deg. TH5>15˚C 2 F<60Hz, TH1>120˚C, TH1-Tc>70deg. TH5 15˚C PUHY-P200·250YMF-B 1 TH10>85°C F<60Hz and continuously for 60 minutes. 2 TH10>95°C F<60Hz and continuously for 15 minutes. 3 TH10>100°C F 60Hz and continuously for 60 minutes. 4 TH1
- 1505Error codeSuction pressure abnormality: <PUHY-200·250YMF-B> 1. Judging the state when the suction pressure reaches near 0kg/ cm2G (0MPa) during compressor operation by the low pressure saturation temperature (At cooling: TH2, at heating: TH3), error stop will be commenced displaying “1505”. 2. The outdoor unit once stops entering into the 3-minutes restart mode if the state of 1 continues for 3 minutes, and restarts after 3 minutes. 3. After restarting, if the same state as 1 continues within 30 minutes from the stopping of 2, error s
- 2000Error codeInterlock operation: In modes other than the stop mode, the pump interlock circuit performs an abnormal stop when it has been open continuously for 10 minutes, and at that time, displays “2000.” However, This is displayed when DIP SW 2-8 on the heat source unit MAIN board is OFF.
- 2134Error codeAbnormal water temperature: 1. If the inlet water temperature 5°C is detected to be below or 50°C over during operation (the first time it is detected), the heat source unit is stopped temporarily, the system enters the 3-minute restart prevention mode, then restarts the heat source unit after 3 minutes. 2. If the inlet water temperature 5°C is detected to be below or 50°C over again within 30 minutes after the heat source unit stops following the operation in 1 above, (the second time it is detected), an abnormal stop is
- 2135Error codeFreezing of the water heat exchanger.: 1. If the water heat exchanger freeze prevention thermostat op3±1°C) erates (OFF at (the first time) the heat source unit stops temporarily enters the 3-minute restart prevention mode, the restarts after 3 minutes. 2. If the water heat exchanger freeze prevention thermostat op3±1°C) erates (OFF at again (the second time) within 30 minutes after the heat source units stops according to 1. above, an abnormal stop is performed and at that time, “2135” is displayed. 3. If the water heat exchanger fr
- 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. 2) If the immersion of the sensor in the water is detected four consecutive times at an hour interval, this is considered water leakage, and "2500" appears on the monitor. 3) Detection of water leakage | 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
- 2501Error codeWater pump (pump1, 2) fault: When clogged water circuit or water leaks from the water circuit is detected, the water pump is stopped for protection. When the following statuses are detected, the pump will be stopped. The revolutions of the water pump exceeds the specific range. Pump discharge port: TH34, TH35 ≥ 53ºC [127ºF]
- 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
- 2512Error code3-way valve/Water flow rate control valve fault: Limit signal that is output from 3-way valve/water flow rate control valve is not detected or is not reset after it is detected.
- 2601Error codeWater supply cutoff 2. Cause, check method and remedy
- 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.
- 3152Error codeAbnormal temperature inside the Inverter control box: 1. If the temperature inside the con70°C trol box is detected to be or more during operation (the first time it is detected), the heat source unit is stopped temporarily, the system enters the 3-minute restart prevention mode, then restarts the heat source unit after 3 minutes. 2. If the temperature inside the con70°C trol box is detected to be or more during operation (the second time it is detected) again within 30 minutes after the heat source unit stops according to 1. above, an abnormal sto
- 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 codeIndoor unit fan operation error: 1) Connector CN28 has remained open-circuited for 100 consecutive secondsduring operation.
- 4115Error codePower supply sync signal abnoramlity: 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 speed abnormality (motor abnoramlity): (Detects only for PKFY-VAM) 1. Detecting fan speed below 180rpm or over 2000rpm during fan operation at indoor unit (first detection) enters into the 3-minute restart prevention mode to stop fan for 30 seconds. 2. When detecting fan speed below 180rpm or over 2000rpm again at fan returning after 30 seconsd from fan stopping, error stop (fan also stops) will be commenced displaying 4116.
- 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.
- 4210Error codeBreaking of overcurrent: 1. If IDC 103 A peak is detected during inverter operation. 2. If the voltage of the INV board’s sensor circuit input is what it should not normally be.
- 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 if THHS 100°C is detected.
- 4240Error codeOvercurrent protection: If IDC 66.5 A peak 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 (effective value) (Detail code 107): Overcurrent is detected by the current sensor (94 Apeak or at least 35 Arms). | 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) 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 turns
- 5102Error codePipe temperature sensor (TH22) fault (Indoor unit) Pipe temperature sensor (TH2) fault (OA processing unit) Reverse connected inlet/outlet pipe (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 turns
- 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 turns | Heat exchanger outlet temperature sensor (TH3) fault (Outdoor unit): 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 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 turns | Discharge temperature sensor (TH4) fault (Outdoor unit): 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
- 5105Error codeAccumulator inlet temperature sensor (TH5) fault (Outdoor unit): 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 codeHeat exchanger inlet temperature sensor (TH6) fault (Outdoor unit): 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
- 5107Error codeOutside temperature sensor (TH7) fault (Outdoor unit): 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 codeSC coil bypass outlet (TH8): of -40°C is detected just after the inverter starts or during inverter operation.
- 5109Error codeCS circuit Thermal (TH9): after the compressor starts, or for 3 minutes during defrosting or after recovery following defrosting.
- 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.
- 5111Error codeLiquid inlet (TH11) Bypass outlet controlled) (TH12) HEX inlet liquid level detecting (BC (TH13) abnormality HEX outlet liquid level detecting (TH14) sensor Bypass inlet Thermal (TH15) Intermediate section (TH16): 1. When short (high temp. inlet) or open (low temperature inlet) of thermistor is detected during operation, error stop will be commenced displaying “5111” or “5112”, “5113” or “5114”, or “5115” or “5116. 2. The above detectection is not made during defrostig and 3minute after changing operation mode.
- 5112Error codeCompressor shell temperature (TH10): the inverter starts or during inverter operation.