Toshiba RAV-SM802KRT-E Failure mode detected by outdoor unit (Representative codes)

Failure mode detected by outdoor unit (Representative codes)

• The check code used varies depending on the combination with the outdoor unit.

	Diagnosis function			Judgment and action
Check code	Possible causes	Air conditioner status	Conditions
H01	Compressor breakdown	OFF	Indicated when an	1.Check power voltages (200±20 VAC).
	• Compressor stops due to		error is detected	2.Freezing cycle overload operation
	operating frequency decrease.			3.Check current detect circuit on the AC side.
H02	Compressor does not work.	OFF	Indicated when an	1.Failure of compressor (lock, etc.)
	• Overcurrent protection circuit is		error is detected	... Replace the compressor.
	activated after a certain time from			2.Improper compressor wiring (phase loss)
	compressor startup.			3.Lost-phase operation of power
				supply (3-phase models)
H03	Failure of current detect circuit	OFF	Indicated when an	1.Operation stops soon when restarted.
	• Large AC current even during		error is detected	... Check IPDU.
	compressor OFF			2.Lost-phase operation of power supply
	• Phase loss in power supply			Check 3-phase power voltages and wiring.
H06*1	Low-pressure switch ON	OFF	Indicated when an	1.Check freezing cycle (gas
	(applicable models)		error is detected	leakage).
	COOL : 30 seconds			2.Check low-pressure switch circuit.
	HEAT : 10 minutes			3.Check outdoor unit CDB board.
L29	Other outdoor unit errors	OFF	Indicated when an	1.Check CDB/IPDU wiring.
	• CDB-IPDU communication error		error is detected	2.Freezing cycle overload operation
	(connector disconnection)
	• Abnormal heatsink temperature
	(over specified value)
L31*1	Phase detection protection circuit	Operation	Indicated when an	1.Check phase sequence, reverse
	activated (normal models)	continued	error is detected	phase, and phase loss.
		(compressor		2.Check outdoor unit boards.
		OFF)		3.Check high-pressure switch.
				4.Check high-pressure switch circuit wiring.
P03	Abnormal discharge temperature	OFF	Indicated when an	1.Check freezing cycle (gas leakage).
	(over specified value)		error is detected	2.Failure of electronic expansion valve
				3.Check piping sensor (Td).
P04	Failure of high-pressure protection circuit	OFF	Indicated when an	1.Freezing cycle overload operation
	(Temperature over specified value		error is detected	2.Check outdoor unit TE sensor.
	detected by TE sensor)			3.Check outdoor unit CDB board.
	High-pressure switch (normal models)			4.Check high-pressure switch and circuit.
P22	Failure of outdoor unit DC fan	OFF	Indicated when an	1.Position detect error
			error is detected	2.Overcurrent protection circuit
				operation of outdoor unit fan driver
				3.Outdoor unit fan lock
				4.Check outdoor unit CDB board.
P26	Inverter overcurrent protection	OFF	Indicated when an	1.Operation stops soon when restarted.
	circuit activated (short time)		error is detected	... Compressor partial short-circuit
	Main circuit short voltage operation			2.Check IPDU for improper wiring.
P29	Failure of IPDU position detect	OFF	Indicated when an	1.The circuit is activated even after
	circuit		error is detected	compressor’s 3P connector is
				disconnected. ...Replace IPDU.
F04	Improper mounting, disconnection	OFF	Indicated when an	1.Check TD.
	or short-circuit of outdoor unit temp.		error is detected	2.Check outdoor unit CDB board.
	sensor TD
F06	Improper mounting, disconnection	OFF	Indicated when an	1.Check TE, TS.
	or short-circuit of outdoor unit temp.		error is detected	2.Check outdoor unit CDB board.
	sensor TE, TS
F08	Improper mounting, disconnection	Operation	Indicated when an	1.Check TO.
	or short-circuit of outdoor unit	continued	error is detected	2.Check outdoor unit CDB board.
	outside air temp. sensor TO

*1 ROA-P*** is not detected by 1HS models.

Fan continues rotating in a failure mode detected by outdoor unit because there is no communication between outdoor unit and follower indoor unit in twin group.

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