Mitsubishi Heavy air conditioning errors codes

Descriptions of all Mitsubishi Heavy air conditioning errors

Any Mitsubishi air conditioner has a self-diagnosis function. When turned on and during operation, the microprocessor through many sensors checks the errors of the Mitsubishi Heavy air conditioner in order to stop its operation in time if the parameters are violated. All Mitsubishi Heavy errors are divided into 2 types:

- emergency, for example, compressor malfunction;

- informational, for example, a message about a dirty filter.

Most errors can be cleared by switching the power supply, but with a 3-5-fold repetition within an hour, the air conditioner can stop completely, until a service specialist fixes the problem.

The Mitsubishi air conditioner informs the user of the error codes with a light indication, and when using a wired remote control, also with text on the screen.

In household series, only IR remote controls are used, so the error codes of the Mitsubishi air conditioner can be determined by the number of flashes of two indicators: “Run” in green and “Timer” in yellow. For inverter and On / Off models of different years of production, the same error can be displayed in different ways.

In semi-industrial and multi-zonal series, wired remotes are predominantly installed, where Mitsubishi Heavy error codes can be read from the remote control LCD screen, RC-E5 or RC-EX1.

Mitsubishi Heavy Air Conditioner Errors are indicated by the letter E (error) and a two-digit number. All error codes for Mitsubishi Heavy air conditioners are universal for residential, semi-industrial and multi-zone series. Those. E5 code, for example, will mean “Lack of communication between indoor and outdoor unit” for any MHI air conditioner.

Mitsubishi Heavy Domestic Series Errors

Run	Timer	Mitsubishi Air Conditioner Error
1 blink	Steady light	E6
2x flashing	Steady light	E7
3x flashing	Steady light	E6
4x flashing	Steady light	E9
5x flashing	Steady light	E47
6x flashing	Steady light	E16
7x flashing	Steady light	E57
Flashing constantly	1 blink	E38
Flashing constantly	2x flashing	E37
Flashing constantly	4x flashing	E39
Steady light	1 blink	E42
Steady light	2x flashing	E59
Steady light	3x flashing	E58
Steady light	4x flashing	E51
Steady light	5x flashing	E36
Steady light	6x flashing	E5
Steady light	7x flashing	E48
Steady light	Flashing constantly	E35
2x flashing	2x flashing	E60
Not glow	5x flashing	E5
3x flashing	5x flashing	E35
3x flashing	6x flashing	E36
3x flashing	7x flashing	E37
3x flashing	8x flashing	E38
3x flashing	9x flashing	E39
4x flashing	2x flashing	E42
4x flashing	7x flashing	E47
4x flashing	8x flashing	E48
5x flashing	1 blink	E51
5x flashing	3x flashing	E53
5x flashing	7x flashing	E57
5x flashing	8x flashing	E58
5x flashing	9x flashing	E59
6x flashing	Not glow	E60
6x flashing	1 blink	E61
6x flashing	2x flashing	E62
7x flashing	1 blink	E40
8x flashing	Not glow	E80
8x flashing	2x flashing	E82
8x flashing	4x flashing	E84
8x flashing	5x flashing	E85
8x flashing	6x flashing	E86

In semi-industrial and multi-zone equipment, the Mitsubishi Heavy error codes from E1 to E31 refer to indoor units and are displayed only on the remote control of the problem unit. Mitsubishi Heavy error codes with numbers E32 - E75 refer to outdoor units and are displayed on all wired remotes of this freon circuit.

Mitsubishi Heavy Air Conditioners Errors

Mitsubishi Error Codes	Mitsubishi Error Description	Possible Causes of Mitsubishi Heavy Error
E1	Remote control connection error	• Bad contact or breakage of the signal wire • Electromagnetic interference to the cable • Faulty PCB of the indoor unit or remote control
E2	Double address of indoor unit	• The number of connected units exceeds the limit. • Double address of indoor unit. • Defective PCB control indoor unit.
E3	Signal line error	It occurs when there is a complete lack of communication between all indoor and outdoor units. If a connection appears between the indoor and outdoor units, the error changes to E 5. In both cases, check the fuses and wires of the signal line. Check the set outdoor unit number.
E5	Error inter-unit communication	If there is no connection between indoor and outdoor units for more than 2 minutes. • Power failure of the external unit. • Polarity A and B reversed after power is applied.
E6	Faulty sensor 1 (2) of the heat exchanger of the indoor unit	• Defective indoor unit heat exchanger sensor connector • Defective indoor unit heat exchanger sensor • Indoor unit PCB malfunction
E7	Faulty room temperature sensor	• Inlet air temperature sensor connector defective • Inlet air temperature sensor defective • Indoor unit PCB malfunction
E8	Overload protection in heating mode	• Air filter is dirty • Faulty temperature sensor on the heat exchanger of the indoor unit (short circuit) • Faulty PCB of the indoor unit
E9	Drainage failure	• Drain pump malfunction, cable damage, plug disconnected, drain pipe clogged • Float relay malfunctioning • Indoor PCB malfunction
E10	Exceeding the number of indoor units (more than 16) controlled from one control panel
E11	Incorrect addressing connection between master and slave blocks	• For RC - EX 1: "Menu" - "Setting the indoor units" - "I / O selection"
E12	In one SL network, automatic addressing (from the control panel) and manual addressing are mixed.
E14	Communication error between master and slave blocks	• Master unit is not specified • Incorrect connection of the remote control cable, damage to the remote control cable between the master and slave units
E16	Malfunction of indoor fan motor	• Motor fault • Faulty PCB of the indoor unit (for FDTC and FDT, check fuse F 202).
E18	Incorrect addressing connection between master and slave blocks	• The number of the master indoor unit has not been set. • The address of the slave indoor unit is the same as the address of the master indoor unit. • No power at the master unit
E19	Pump error due to non-shutdown of SW 7-1 after checking the operability of the indoor unit
E20	Oversized indoor unit fan speed
E21	The filter panel of the indoor unit is not latched ( FDT only )
E22	Error connecting to outdoor unit	Indoor units 1.5 kW can be connected to outdoor units KX 6: • FDC 224-335 KXE 6 with code A and higher • FDC 400-1360 KXE 6 with code F and higher
E28	Faulty temperature sensor wired remote control	10 seconds after turning off the sensor of the control panel, E 28 will not be displayed, even if the sensor wire is disconnected. At this time, switching from the sensor of the control panel to the temperature sensor of the incoming air of the indoor unit occurs.

E30	Lack of connection of internal and external units	• Faulty PCB control unit indoor unit • Faulty PCB control unit outdoor unit
E31	Dual Address External Unit	• Addressing error of external units • More than 128 indoor units connected • Master / slave switch for combined outdoor units not set * Addressing will not be confirmed if the power is not reset. ** In the case of combining blocks, set the same addresses for the master and slave blocks. Master and slave units can be assigned using SW4-7.
E32	Open L 3 phase power supply on the primary side	When the voltage between L 1- N and L 2- N is 0 V , and / or the current L 3 decreases (0 amperes).
E36	Elevated discharge pipe temperature ( Tho - D 1)	• Malfunction of the exhaust pipe temperature sensor • Malfunction of the high pressure sensor • Insufficient refrigerant • Malfunction of the EEV of the indoor unit • Malfunction of the temperature sensor of the heat exchanger of the indoor unit • Malfunction of the EEVH of the outdoor unit • Malfunction of the suction pipe temperature sensor or malfunction of the low pressure sensor • Malfunction of the EEVSC of the outdoor unit • Malfunction temperature sensor Tho - H
E37	Faulty outdoor unit heat exchanger sensor	The red LED additionally indicates a problem thermistor: • Tho - R 1: flashes 1 time ( E 37-1) • Tho - R 2: flashes 2 times ( E 37-2) • Tho - R 3: flashes 3 times ( E 37-3) • Tho - R 4: flashes 4 times ( E 37-4) • Tho - SC : flashes 5 times ( E 37-5) • Tho - H : flashes 6 times ( E 37-6)
E38	Outside temperature sensor defective	• Failure of the outdoor unit control PCB • Broken wire of the thermistor or temperature sensor section • Broken wire connection (connector)
E39	Faulty discharge pipe temperature sensor	• Failure of the outdoor unit control PCB • Broken wire of the thermistor or temperature sensor section • Broken wire connection (connector)
E40	High pressure error (63H1 activated)	• Short circuit in the air flow circuit, air flow failure, contamination of the outdoor heat exchanger / malfunction of the fan motor • Malfunction of the outdoor unit control PCB • Malfunction of the 63 H 1 connector • Malfunction of the electronic valve connector • Service port closed • Non-condensable gas (nitrogen, etc.) mixture .)
E41	Power transistor overheating	• Inverter PCB malfunction • Outdoor fan motor malfunction • Power transistor radiator rib improperly fixed • Power transistor temperature thermistor malfunction • Insufficient installation space for the outdoor unit
E42	Current cutoff	• Ports closed • Malfunction in power supply • Excess refrigerant • Malfunction of compressor • Malfunction of power transistor module
E43	Exceeding the number of connected indoor units, exceeding the permissible total power	• Error addressing the indoor / outdoor unit • Error connecting signal wires
E44	Wet stroke	• Pipeline and signal line mismatch • Refrigerant refueling • Refrigerant circulation through the bypass valve • Refrigerant overheating control error
E45	Inverter Communication Error	• Faulty inverter PCB • Faulty connector between the control unit PCB of the outdoor unit and the inverter PCB • Faulty control unit PCB of the outdoor unit
E46	Mixing manual and automatic addressing in the same SL network
E47	Inverter over current error	• Fault PCB outdoor unit • Dust on PCB management • Blown F 2
E48	Malfunction of the fan motor of the outdoor unit	• Faulty PCB for controlling the external unit • Foreign objects getting into the fan rotation area • Faulty fan motor
E49	Low pressure error or low pressure sensor malfunction	• Low pressure sensor ( PSL defect ) • Service valve closed • EEV closed (incorrect operation) • Insufficient refrigerant volume • Clogged ( EEV , filter)

E51	Power transistor overheats for 15 minutes	• Malfunction of the power transistor • Malfunction of the inverter and fan motor
E53	Malfunction of the suction pipe temperature sensor	• Disconnecting the thermistor wire or the internal wire of the reading part (check the pressed part) • Disconnecting the thermistor connector • Defective control PCB of the external unit
E54	Malfunction of the high pressure sensor / low pressure sensor	The red LED additionally indicates a problem thermistor: • E 54-1 / flashes 1 time: low pressure sensor anomaly • E 54-2 / flashes 2 times: high pressure sensor anomaly
E55	Compressor temperature sensor malfunction ( Tho - C 1)	• Disconnecting the thermistor wire or the internal wire of the reading part (check the pressed part) • Disconnecting the thermistor connector • Defective control PCB of the external unit
E56	Overheating of the silo module ( IGBT ) ( Tho - P 1, Tho - P 2)	The red LED indicator additionally indicates a problem thermistor: • E 56-1 / flashes 1 time: anomaly Tho - P 1 • E 56-2 / flashes 2 times: anomaly Tho - P 2
E57		• Lack of refrigerant • Closed valve
E58	Emergency termination of supply current	• Excess refrigerant amount • Installation space of indoor and outdoor units not respected • Compressor malfunction • Faulty outdoor temperature sensor • Faulty PCB control unit
E59	Error starting compressor	• Malfunction of the outdoor fan motor • Inverter PCB malfunction • Abnormal supply voltage • Inadequate refrigerant quantity and malfunction of the refrigerant circuit • Faulty compressor (motor bearing)
E60	Error determining the position of the compressor rotor ( desynchronization )	• Malfunction of the outdoor fan motor • Malfunction of the outdoor PCB control PCB • Inverter PCB malfunction • Abnormal supply voltage • Inadequate refrigerant quantity and malfunction of the refrigerant circuit • Compressor malfunction (motor, bearing)
E61	Communication error between master / slave outdoor units
E63	Emergency stop
E75	Communication error when working with the central console
E82	Faulty indoor unit heat exchanger sensor	• The temperature sensor is defective (sensor defect, cable damage, short circuit) • Disconnection of the temperature sensor connector
E84	High humidity
E85	Protection from frost	• Indoor fan speed has dropped. • Indoor heat exchanger sensor malfunction.
E86	High pressure in heating mode	• System overload • Indoor fan speed dropped • Indoor unit heat exchanger sensor malfunction

Comments: 2

#2
Reggie ordillano (Wednesday, 28 February 2024 10:32)

Good day po maam sir tanong lng po nag palit po ako ng out door brod... May lumalabas na error e47 patulong namn po
#1
Steven (Tuesday, 08 August 2023 12:58)

Can I please download the list of error message