Toshiba MMU-AP0091H service manual 132, Name

132

		Check code
					Detected	Check code	Status	Error detection condition		Check item (position)
Main	Outdoor 7-segment display			AI-NET
					position	name
remote				central control
controller	Check code	Sub-code		remote controller
P01	—	—	11		Indoor	Indoor fan	Corresponding		•	Check the lock of fan motor (AC fan).
						motor error	unit only stops.		•	Check cabling.
P03	P03	—		1E	I/F	Discharge	All stop	Discharge temp (TD1)	•	Check full opening of outdoor service valves (Gas side, Liquid side).
						temp TD1		exceeded 115°C.	• Check clogging of outdoor PMV. (PMV1,2)
						error			•	Check characteristics of TD1 sensor resistance value.
									•	Check refrigerant shortage.
									•	Check 4-way valve error.
									•	Check leakage of SV41 circuit.
									•	Check SV4 circuit. (Miswiring and misinstallation of SV41 and SV42)
									•	Check leakage of SV5 circuit.
									•	Check leakage of SV6 circuit. (Capillary clogging, valve operation error)
									•	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.
P04	P04	01: Compressor 1 side	21		I/F	Actuation of	All stop	High-pressure SW actuated.	•	Check Pd pressure sensor error.
		02: Compressor 2 side				high-pressure			•	Check full opening of outdoor service valves (Gas side, Liquid side).
						SW			•	Check outdoor fan error.
									•	Check outdoor fan motor error.
									•	Check clogging of outdoor PMV. (PMV1,2)
									•	Check clogging of indoor/outdoor heat exchangers.
									•	Check short-circuiting of outdoor suction/discharge air.
									•	Check clogging of SV2 circuit.
									•	Check outdoor P.C. board (I/F) error.
									•	Check indoor fan system error. (Cause of air volume decrease)
									•	Check opening of indoor PMV.
									•	Check miscabling of communication line between indoor and outdoor.
									•	Check operation error of check valve of discharge pipe.
									•	Check SV4 valve circuit.
									•	Check SV5 valve circuit.
									•	Check refrigerant overcharge.
									•	Check mispiping of discharge gas/suction gas main pipe.
									•	Check circuit clogging at auxiliary heat exchanger side. (PMV3, SV12, check valve)
									•	Check FS unit.
										Check clogging of SVD valve and operation error.
										Check wiring inside of FS unit. (SVD/SVS coil miswiring, etc.)
										Check wiring between FS unit and indoor unit.
										(Miswiring, Disconnection, Wiring missing)
P05	P05	01: Power supply		AF	I/F	Phase missing	All stop	• Missing phase was detected	• Check outdoor power line.
		missing phase				or reversed		when the power turned on.	• Check outdoor P.C. board (I/F) error.
		02: Power supply				phase order		• Reversed phase was
		phase order						detected when the power
		(reversed phase)						turned on.