Toshiba HWS-3001CSHM3-E(-UK), HWS-802XWHT6-E, HWS-802H-E, HWS-802XWHM3-E, HWS-2101CSHM3-E(-UK)

	Diagnostic functional operation				Number of
Check				Determination and action	abnormalities	Detailed
code		Backup	Automat		for	item
	Operational cause
		present	ic reset		confirmation
	High pressure protection operation			1. Check that the service valve is fully
	When an abnormal stop occurs due to			open.
	the high pressure release control.			2. Defect of the pulse motor valve.
	When the heat exchange temperature			3. Check the outdoor fan system
P20	sensor (TL) detects 63°C during the	O	×	(including clogging).	10	97
				4. Over-filling of refrigerant.
	cooling operation.
	When the water outlet sensor (TWO)			5. Check the resistance value of the
	detects 60°C during the heating or hot			heat exchange temperature sensor
	water supply operation.			(TL) and the water outlet
				temperature sensor (TWO).
	Outdoor fan system error			1. Check the lock status of the motor
	When a DC fan rotor position detection			fan.
P22	NG, element short circuit, loss of	O	×	2. Check the connection of the fan	1-4	98
	synchronization, or abnormal motor			motor cable connector.
	current occurs.			3. Check the power supply voltage
				(AC230 V±23 V).
	Short circuit of the compressor driver			1. P26 abnormality occurs when
	element error			operating with the compressor
	When an abnormal short circuit of IGBT			wiring disconnected … Check the
				control board.
P26	is detected.	O	×		8	98
				2. No abnormality occurs when
				operating with the compressor
				wiring disconnected … Compressor
				rare short.
	Compressor rotor position error			1. Even if the connection lead wire of
	The rotor position in the compressor			the compressor is disconnected, it
	cannot be detected.			stops due to an abnormality in the
				position detection … Replace the
P29		O	×		8	98
				inverter control board.
				2. Check the wire wound resistor of the
				compressor. Short circuit
				… Replace the compressor.

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