Toshiba HWS-802XWHM3-E, HWS-802XWHT6-E, HWS-802H-E, HWS-3001CSHM3-E(-UK), 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
	Operation of case thermostat			1. Check the refrigeration cycle (gas
	When the case thermostat exceeds			leak).
	125°C.			2. Check the case thermostat and
H04		O	×	connector.	4	92
				3. Check that the service valve is fully
				open.
				4. Defect of the pulse motor valve.
				5. Check for a kinked piping.
L10	Unset service PC board jumper	O	×	1. Cut J800-J803.	1	92
	Jumpers J800-J803 have not been cut.
	The communication between the
L29	outdoor PC board MUCs error	O	×	1. Replace the outdoor control board.	1	93
	No communication signal between IPDU
	and CDB.
	The outlet temperature error			1. Check the refrigeration cycle (gas
	When the discharge temperature sensor			leak).
P03	(TD) exceeds 111°C.	O	×	2. Defect of the pulse motor valve.	4	94
				3. Check the resistance value of the
				discharge temperature sensor (TD).
P04	The high pressure switch error	O	×		10	94
	The power supply voltage error			1. Check the power supply voltage.
P05	When the power supply voltage is	O	×		4	94
				(AC230 V±23 V)
	extremely high or low.
	Overheating of heat-sink error			1. Check the thread fastening and
	When the heat-sink exceeds 105°C.			heat-sink grease between the
				outdoor control board and the heat-
P07		O	×	sink.	4	95
				2. Check the heat-sink fan duct.
				3. Check the resistance value of the
				heat-sink temperature sensor (TH).
	Detection of gas leak			1. Check the refrigeration cycle (gas
	When the discharge temperature sensor			leak).
	(TD) exceeds 106°C for consecutive 10			2. Check that the service valve is fully
	min.			open.
P15	When the suction temperature sensor	O	×	3. Defect of the pulse motor valve.	4	95
				4. Check for a kinked piping.
	(TS) exceeds 60°C for cooling or 40°C
	for heating for 10 consecutive min.			5. Check the resistance value of the
				discharge temperature sensor (TD)
				and the suction temperature sensor
				(TS).
	The 4-way valve inversion error			1. Check the operation of the 4-way
	When the heat exchange temperature			valve unit or the coil characteristics.
	sensor (TE) exceeds 30°C or the suction			2. Defect of the pulse motor valve.
P19	temperature sensor (TS) exceeds 50°C	O	×	3. Check the resistance value of the	4	96
	during the heat pump operation.			heat exchange temperature sensor
				(TE) and the suction temperature
				sensor (TS).

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