Outdoor 7-segment display Check code name

	Check code
			Detected
Main	Outdoor 7-segment display		Detected	Check code name	Status		Error detection condition		Check item (position)
Main	Outdoor 7-segment display		position	Check code name	Status		Error detection condition		Check item (position)
remote			position
remote
controller	Check code	Auxiliary code

P22	P22	0: IGBT shortage	FAN-IPDU	Outdoor fan IPDU error	All stop	(Auxiliary code: 0)		• Check fan motor. (Interphase short-circuit)
		1: Position detection circuit error				•	Short-circuit current was detected at start time.	•	Check fan IPDU error.
		3: Motor lock error				•	Short-circuit current was detected when
		4: Motor current error detection					checking IGBT short-circuit before start time.
		4: Motor current error detection
		C: TH sensor temp. error			All stop	(Auxiliary code: 1)		•	Check fan IPDU error.
		D: TH sensor error			All stop	(Auxiliary code: 1)		•	Check fan IPDU error.
		D: TH sensor error				•	The standard value of detection circuit of fan
		E: Vdc error				•	The standard value of detection circuit of fan
		E: Vdc error					IPDU current fluctuated at start time.

					All stop	(Auxiliary code: 3)		•	Check fan motor. (Lock, phase missing)
						• Abnormal current was detected within 30		• Check cause of abnormal overload at start time.
							seconds after start time.	• Check connection of connector to fan motor.
								• Check connection of connector to fan motor.

					All stop	(Auxiliary code: 4)		•	Check power supply voltage.
						• Short-circuit current was detected when		• Check fan IPDU error.
							2 seconds or more passed after start time.
						• Over-current was detected when 30 seconds
							or more passed after start time.

					All stop	(Auxiliary code: C)		•	Check outdoor fan system.
						• Heat sink sensor (TH) of fan IPDU detected		• Check fan IPDU error.
							95°C error.	• Check fixation between fan IPDU and heat sink.
								• Check fixation between fan IPDU and heat sink.

					All stop	(Auxiliary code: D)		•	Check fan IPDU error.
						• Heat sink sensor (TH) of fan IPDU detected
							short-circuiting or open.

					All stop	(Auxiliary code: E)		•	Check input power supply voltage of the fan IPDU.
						• Input power supply voltage of the fan IPDU		• Check power supply P.C. board error of the fan IPDU.
							over the setup value was detected.	•	Check error of external electrolytic condenser.
						• Input power supply terminal of the fan IPDU		•	Check error of external electrolytic condenser.
						• Input power supply terminal of the fan IPDU
							was unconnected.
						• Power supply P.C. board error of the fan IPDU

P26	P26	01: Compressor 1 side	IPDU	G-Tr short-circuit	All stop	Instantaneous over-current was detected when		• Check connector connection and wiring on IPDU P.C. board.
		02: Compressor 2 side		protection error		compressor started.		• Check compressor error and defect of compressor coil.
		02: Compressor 2 side						• Check compressor error and defect of compressor coil.
								• Check outdoor P.C. board (IPDU) error.

P29	P29	01: Compressor 1 side	IPDU	Compressor position	All stop	Position was not normally detected.		• Check connector connection and wiring.
		02: Compressor 2 side		detection circuit error				• Check compressor error and defect of compressor coil.
		02: Compressor 2 side						• Check compressor error and defect of compressor coil.
								• Check P.C. board (IPDU) error.

P31	—	—	Indoor	Other indoor error	Corresponding	E07/L07/L03/L08 was detected when other		• Check indoor P.C. board.
				(Group follower unit error)	unit only stops.	indoor unit in the group was defective.

MMU-AP0181MH, MMU-AP0071MH, MMU-AP0091MH, MMU-AP0151MH, MMU-AP0121MH specifications

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Check code

Detected

Outdoor 7-segment display

Check code name

Error detection condition

Check item (position)

remote

Check code

G-Tr short-circuit

MMU-AP0181MH, MMU-AP0071MH, MMU-AP0091MH, MMU-AP0151MH, MMU-AP0121MH specifications