Toshiba MMU-AP0091H 129, Status, Check all the outdoor units in the corresponding line

129

		Check code
					Detected	Check code name	Status	Error detection condition		Check item (position)
Main	Outdoor 7-segment display			AI-NET
remote				central control	position
controller	Check code	Sub-code		remote controller
H07	H07	—		d7	I/F	Protection for oil	All stop	The operating compressor	Check all the outdoor units in the corresponding line.
						level drop detection		detected oil shortage	• Check full opening of service valve of balance pipe.
								continuously for 2 hours.	• Check connection and installation of TK1, TK2, TK3, and TK4 sensors.
									• Check characteristics of TK1, TK2, TK3, and TK4 resistance values.
									• Check gas leak and oil leak in the same line.
									• Check refrigerant stagnation in compressor.
									• Check error of SV3A, SV3B, SV3C, SV3D, and SV3E valves.
									•	Check clogging of oil separator oil return circuit.
									•	Check clogging of oil-equation circuit.
									<Check clogging of oil equation pipe between compressors.>
									• Check TS1, TS2 sensors (Miswiring and misinstallation of TS1 and TS2)
									• Check leakage of SV6 circuit.
									• Check FS unit.
										Leakage of check valve of bypass between liquid pipe and discharge gas pipe
										Mispiping of discharge/suction gas connection
										Miswiring of SVD/SVS valve/Misinstallation of coil
									• Check whether there is no setup missing of indoor unit in all cooling operation mode
H08	H08	01: TK1 sensor error		d4	I/F	Oil level detective	All stop	• Resistance value of	• Check connection of TK1 sensor connector.
		02: TK2 sensor error
						temp sensor error		sensor is infinite or zero.	• Check characteristics of TK1 sensor resistance value.
		03: TK3 sensor error
								(Open/Short)	• Check outdoor P.C. board (I/F) error.
		04: TK4 sensor error
							All stop	• Resistance value of	• Check connection of TK2 sensor connector.
								sensor is infinite or zero.	• Check characteristics of TK2 sensor resistance value.
								(Open/Short)	• Check outdoor P.C. board (I/F) error.
							All stop	• Resistance value of	• Check connection of TK3 sensor connector.
								sensor is infinite or zero.	• Check characteristics of TK3 sensor resistance value.
								(Open/Short)	• Check outdoor P.C. board (I/F) error.
							All stop	• Resistance value of	• Check connection of TK4 sensor connector.
								sensor is infinite or zero.	• Check characteristics of TK4 sensor resistance value.
								(Open/Short)	• Check outdoor P.C. board (I/F) error.
H14	H14	—	44		I/F	Compressor 2	All stop	Compressor 2 case	• Check compressor 2 case thermo circuit. (Connector, cable, P.C. board)
						case thermo		thermostat operated.	• Check full opening of service valve. (Gas and liquid side)
						operation			• Check outdoor PMV clogging. (PMV1, 2)
									• Check SV42 valve leak.
									• Check miscabling/misinstallation of SV41 and SV42.
									• Check valve opening of indoor PMV.
									• Check 4-way valve error.
									• Check refrigerant shortage.
									• 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.