Mitsubishi Heavy Industries Air Conditioning Fault Codes For PAC Multi Indoor and Outdoor systems HEN, HENR, HENAR, VN, VNP, VS, VSA, VNX,VSX

PAC SELF-DIAGNOSIS INFORMATION
Inverter PAC Outdoor		FDCVA	HEN, HENR, HENAR
		FDC	VN, VNP, VS, VSA, VNX,VSX
Error Code	Indoor PCB LEDs		Outdoor unit LEDs			Description of Fault	Possible Cause
	RED	GREEN (1)	RED	GREEN (1)	INV LED
E33	Off	Flashing	1x	Flashing	-	Power supply	Anomalous current on inv erter primary side
E34	Off	Flashing	1x	Flashing	Flashing	Power supply	Phase open circuit, faulty outdoor control PCB (3 Phase model)
E35	Off	Flashing	1x	Flashing	Flashing	Outdoor heat exchanger thermistor	Ov erheat of condenser, faulty thermistor, faulty outdoor PCB
E36	Off	Flashing	1x	Flashing	Flashing	Discharge pipe thermistor	High discharge temp, faulty sensor, faulty outdoor control PCB
E37	Off	Flashing	1x	Flashing	Flashing	Outdoor heat exchanger thermistor	Poor connection, broken wire, faulty thermistor, faulty PCB
E38	Off	Flashing	1x	Flashing	Flashing	Outdoor ambient air sensor	Poor connection, broken wire, faulty thermistor, faulty PCB
E39	Off	Flashing	1x	Flashing	Flashing	Discharge pipe thermistor	Poor connection, broken wire, faulty thermistor, faulty PCB
E40	Off	Flashing	1x	Flashing	Flashing	High Pressure Error	Activ ation of HP switch (63H1), closed serv ice v alv e, faulty PCB (63H1 Circuit)
E41	Off	Flashing	1x	Flashing	2 or 6x	Power Transistor ov erheat	S hort circuit of air flow, faulty Inv erter PCB
E42	Off	Flashing	1x	Flashing	1 or 5x	Current Cut	Closed serv ice v alv e, faulty outdoor control PCB
E45	Off	Flashing	1x	Flashing	Flashing	Communication      Error      - Inv erter to Control PCB	Poor Connection, faulty control or inv erter PCBs
E47	Off	Flashing	1x	Flashing	7x	Control PCB, Power transistor	Anomalous inv erter ov er v oltage
E48	Off	Flashing	1x	Flashing	Flashing	Condenser fan motor	Faulty fan motor or outdoor PCB
E49	Off	Flashing	1x	Flashing	Flashing	Low Pressure Error	Closed serv ice v alv e, short of gas, faulty LP sensor, faulty outdoor control PCB
E51	Off	Flashing	1x	Flashing	2 or 6x	Inv erter Error	Faulty Inv erter PCB
E53	Off	Flashing	1x	Flashing	Flashing	S uction pipe thermistor	Poor connection, broken wire, faulty thermistor, faulty PCB
E54	Off	Flashing	1x	Flashing	Flashing	Low Pressure S ensor Error	Closed serv ice v alv e, short of gas, faulty LP sensor, faulty outdoor control PCB
E55	Off	Flashing	1x	Flashing	Flashing	Under-dome temp thermistor	Poor connection, broken wire, faulty thermistor, faulty PCB
E57	Off	Flashing	1x	Flashing	Flashing	Low Pressure Error	Insufficient refrigerant
E59	Off	Flashing	5x	Flashing	Off or 4x	Compressor start up error	Faulty power supply, faulty inv erter circuit.
E60	Off	Flashing	1x	Flashing	-	Compressor	Faulty compressor, faulty inv erter circuit.
E75	Off	Flashing	Off	Flashing	-	Central Controller communication error	Poor connection, broken wire, faulty controller

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Orion Air Conditioning & Refrigeration Ltd

10 Grisedale Court,

Woburn Road Ind. Est.

Kempston,

Bedfordshire,

MK42 7EE,

United Kingdom