Toshiba RAV-SM2244AT8Z-E, RAV-SM2804AT8ZG-E service manual H03 Current detection circuit error Stop

			Operation of diagnostic function
Check code
							Judgment and measures
Indoor unit			Cause of operation	Status of	Condition
				air conditioner
before	after
3 series	4 series
	H03	Current detection circuit error		Stop	Displayed when	1. Check outdoor P.C. board (MCC-1596).
					error is detected		(AC current detection circuit)
H03
		Open phase of 3-phase power			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
		supply			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.
H06							(Gas side, Liquid side)
						2.	Check clogging of outdoor PMV. (PMV1, 2)
					Displayed when	3.	Check SV2 circuit.
	H06	Low pressure protective operation		Stop	error is detected	4.	Check Ps sensor error.
						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	P03	∗	Discharge temp. (TD) over	Stop		2.	Trouble of electronic expansion valve
					error is detected
			specified value was detected.			3.	Check discharge temp. sensor (TD).
						1.	Check case thermostat and connector.
		Case thermostat operation				2.	Check gas leak, recharge
	H04			Stop	Displayed when	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.
P04						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. AC342 to 457V
					error is detected
						1.	Check outdoor heat exchanger sensor (TL).
		High pressure protective operation				2.	Check indoor heat exchanger sensor (TC, TCJ).
		•	During cooling operation, outdoor			3.	Check full open of service valve.
	P20		temp. sensor (TL) detected	Stop	Displayed when	4.	Check indoor/outdoor fan.
			temperature over specified temp.
					error is detected	5.	Check PMV (Pulse Motor Valve).
		•	During heating operation, indoor
						6.	Check clogging and short circuit of indoor/outdoor heat
			temp. sensor (TC, TCJ) detected
			temperature over specified temp.				exchanger.
						7.	Overcharge of refrigerant. Recharge
						1.	Check lock of fan motor.
P22	P22	Outdoor fan system error		Stop	Displayed when	2. Check power supply voltage between L2 and N.
					error is detected		AC198 to 264V
						3.	Check outdoor P.C. board.
						1.	When performing operation while taking-off compressor
		Short-circuit error of compressor			Displayed when		wire, P26 error occurs. Check control P.C. board
P26	P26			Stop			(MCC-1596).
		driving element			error is detected	2.	When performing operation while taking-off compressor
							wire, an error does not occur. (Compressor rare short)
P29	P29	Position detection circuit error		Stop	Displayed when	1.	Check control P.C. board (MCC-1596).
					error is detected

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