Toshiba RAV-SP1404AT8ZG-E, RAV-SP1104AT8ZG-TR, RAV-SP1104AT8-TR, RAV-SP1404AT8ZG-TR service manual 67

		Operation of diagnostic function
Check code
Indoor unit		Cause of operation	Status of	Condition		Judgment and measures
			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
	P05	Open phase of 3-phase power	Stop	Displayed when	1.	Check open phase of 3-phase power supply.
					2.	Black lead wire to be connected to CN03 of MCC-1596
		supply		error is detected
						does not pass through T611.
		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		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.
	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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