Toshiba RAV-SM564MUT-TR, RAV-SM454MUT-E Operation of diagnostic function Check Status

	Operation of diagnostic function
Check		Status of
code
	Cause of operation	air conditioner	Condition		Judgment and measures
Indoor
unit
H03	Current detection circuit error	Stop	Displayed when	1. Check outdoor P.C. board (MCC-1596).
			error is detected		(AC current detection circuit)
	Open phase of 3-phase power supply		Displayed when	1.	Check open phase of 3-phase power supply.
P05		Stop		2.	Black lead wire to be connected to CN03 of MCC-1596
			error is detected
					does not pass through T611.
				1.	Check connection of Ps sensor connector.
			Displayed when	2.	Check failure of Ps sensor.
F23	Ps sensor error	Stop		3.	Check compressing power error of compressor.
			error is detected
				4.	Check 4-way valve error.
				5.	Check outdoor P.C. board error.
				1.	Check service valves are fully opened.
					(Gas side, Liquid side)
				2.	Check clogging of outdoor PMV. (PMV1, 2)
			Displayed when	3.	Check SV2 circuit.
H06	Low pressure protective operation	Stop		4.	Check Ps sensor error.
			error is detected
				5.	Check clogging of indoor filter.
				6.	Check clogging of refrigerant pipe.
				7.	Check of outdoor fan operation. (In heating mode)
				8.	Check short of refrigerant.
	Discharge temp. error		Displayed when	1.	Check refrigerating cycle (Gas leak)
P03	∗ Discharge temp. (TD) over specified value	Stop		2.	Trouble of electronic expansion valve
			error is detected
	was detected.(1.6)			3.	Check discharge temp. sensor (TD).
				1.	Check case thermostat and connector.
	Case thermostat operation		Displayed when	2.	Check gas leak, recharge
H04		Stop		3.	Check full open of service valve.
	∗ Abnormal overheat of compressor
			error is detected
				4.	Check PMV (Pulse Motor Valve).
				5.	Check broken pipe.
				1.	Check service valves are fully opened.
					(Gas side, Liquid side)
				2.	Check of outdoor fan operation.
				3.	Check motor error of outdoor fan.
			Displayed when	4.	Check clogging of outdoor PMV. (PMV1, 2)
P04	High pressure SW system error	Stop		5.	Check clogging of heat exchanger in indoor/outdoor units.
			error is detected
				6.	Short-circuit status of suction/discharge air in outdoor unit.
				7.	Check outdoor P.C. board error.
				8.	Check fan system error (Cause of air volume drop) at
					indoor side.
				9.	Check PMV opening status in indoor unit.
P05	Power supply voltage error	Stop	Displayed when	1. Check power supply voltage.
			error is detected
	High pressure protective operation			1.	Check outdoor heat exchanger sensor (TL).
				2.	Check indoor heat exchanger sensor (TC, TCJ).
	• During cooling operation, outdoor temp.
				3.	Check full open of service valve.
	sensor (TL) detected temperature over
P20			Displayed when	4.	Check indoor/outdoor fan.
	specified temp.	Stop
			error is detected	5.	Check PMV (Pulse Motor Valve).
	• During heating operation, indoor temp.
				6.	Check clogging and short circuit of indoor/outdoor heat
	sensor (TC, TCJ) detected temperature over
	specified temp.				exchanger.
				7.	Overcharge of refrigerant. Recharge
			Displayed when	1.	Check lock of fan motor.
P22	Outdoor fan system error	Stop		2. Check power supply voltage between L2 and N.
			error is detected
				3.	Check outdoor P.C. board.
				1.	When performing operation while taking-off compressor
P26	Short-circuit error of compressor driving	Stop	Displayed when		wire, P26 error occurs. Check control P.C. board.
	element		error is detected	2.	When performing operation while taking-off compressor
					wire, an error does not occur. (Compressor rare short)
P29	Position detection circuit error	Stop	Displayed when	1.	Check control P.C. board.
			error is detected

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