Toshiba MMU-AP0091H service manual 128, Detected Check code name

128

		Check code
				Detected	Check code name	Status	Error detection condition	Check item (position)
Main	Outdoor 7-segment display		AI-NET
				position
remote			central control
controller	Check code	Sub-code	remote controller
H03	H03	01: Compressor 1 side	17	IPDU	Current detection	All stop	While header compressor	• Check cabling of current detection circuit system.
		02: Compressor 2 side			circuit system error		stopped, current flowed more	• Check outdoor P.C. board (IPDU) error.
							than the specified amount.
H04	H04	—	44	I/F	Compressor 1 case	All stop	Compressor 1 case thermostat	• Check compressor 1 case thermo circuit. (Connector, cable, P.C. board)
					thermo operation		performed protective operation.	• Check full opening of service valve. (Gas and liquid side)
								• Check outdoor PMV clogging. (PMV1, 2, 3)
								• Check SV41 circuit leakage.
								• Check miscabling/misinstallation of SV41 and SV42.
								• Check valve open status of indoor PMV.
								• Check 4-way valve error.
								• Check refrigerant shortage.
								• Check SV5 leak.
								• Check SV11 circuit. (Wiring, OFF at one side only)
								• Check mispiping of discharge gas/suction gas main pipe.
								• Check Flow selector unit.
								Check leakage of SVD valve and SVS valve.
								(Check leakage of SVDD valve and SVSS.)
								Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),
								wiring between FS unit and indoor unit, and connection of connectors.
								Check miswiring of SVS/SVD valves.
H06	H06	—	20	I/F	Low-pressure	All stop	Low-pressure Ps detected	• Check full opening of service valve.
					protective operation		operation lower than 0.02MPa.	(Discharge gas, suction gas and liquid side)
								• Check outdoor PMV clogging. (PMV1, 2)
								• Check SV2 circuit and SV4 circuit error.
								• Check low-pressure Ps sensor error.
								• Check indoor air filter clogging.
								• Check valve open of indoor PMV.
								• Check refrigerant pipe clogging.
								• Check outdoor fan operation.
								(All heating, mainly heating, part cooling operation)
								• Check refrigerant shortage.
								• Check clogging of circuit at auxiliary heat exchanger side.
								(PMV3, SV12, check valve)
								• Check 4-way valve error. (Reversal error)
								• Check mispiping of discharge gas/suction gas main pipe.
								• Check Flow selector unit.
								Check miswiring of discharge gas/suction gas pipe to FS unit.
								Check wiring between FS unit and indoor unit.
								Check miswiring of SVD/SVS valves, misinstallation of coil.
								Check opened status of SVS valve.