Toshiba MMU-AP0091MH, MMU-AP0181MH Check code Main Outdoor 7-segment display Remote, H16

57

Check code

Main	Outdoor 7-segment display
remote
	Check code	Auxiliary code
controller
H16	H16	01: TK1 oil circuit system error
		02: TK2 oil circuit system error
		03: TK3 oil circuit system error
		04: TK4 oil circuit system error

L03	—	—
L04	L04	—
L05	—	—

Detected	Check code name	Status	Error detection condition		Check item (position)
position
I/F	Oil level detective circuit system error	All stop	Temperature change of TK1 could not be	•	Check TK1 sensor coming-off.
	MG-SW error		detected though compressor 1 started	•	Check characteristics of TK1 sensor resistance value.
			the operation.
	OCR operation			• Check TK1, TK2, TK3, and TK4 misconnection.
				•	Check operation error of SV3E valve.
				•	Check capillary clogging of oil-equation circuit and operation error
					of stop valve.
				•	Check refrigerant stagnation in compressor.
				• Check MG-SW or OCR.
			Temperature change of TK2 could not be	• Check TK2 sensor coming-off.
			detected though compressor 2 started	• Check characteristics of TK2 sensor resistance value.
			the operation.
				• Check TK1, TK2, TK3, and TK4 misconnection.
				•	Check SV3E valve operation.
				•	Check capillary clogging of oil equalization circuit and check stop
					valve operation.
				•	Check refrigerant stagnation in compressor shell.
				• Check MG-SW or OCR.
			Temperature change of TK3 could not be	• Check TK3 sensor coming-off.
			detected though compressor started the	• Check characteristics of TK3 sensor resistance value.
			operation.
				• Check TK1, TK2, TK3, and TK4 misconnection.
				•	Check SV3E valve operation.
				•	Check capillary clogging of oil-equalization circuit and check valve
					operation.
				•	Check refrigerant stagnation in compressor shell.
				• Check MG-SW or OCR.
			Temperature change of TK4 could not be	• Check TK4 sensor coming-off.
			detected though compressor started the	• Check characteristics of TK4 sensor resistance value.
			operation, or the difference from other TK
				• Check TK1, TK2, TK3, and TK4 misconnection.
			sensor changed for a constant time only
			within the specified range.	•	Check SV3E valve operation.
				•	Check capillary clogging of oil-equalization circuit and check valve
					operation.
				•	Check refrigerant stagnation in compressor shell.
				• Check MG-SW or OCR.
Indoor	Duplicated indoor center units	Corresponding	There are multiple center units in a group.	•	Check indoor address.
		unit only stops.		•	Check the change of remote controller connection
					(Group/individual) after indoor address setup.
I/F	Duplicated outdoor line address	All stop	Line address setup is duplicated against	•	Check line address.
			the outdoor unit in different refrigerant
			pipe system.
I/F	Duplicated indoor units with priority	All stop	Indoor units with priority were duplicated.	•	Check display of indoor unit with priority.
	(Displayed on indoor unit with priority)

MG-SW : Magnet Switch, OCR : Over-current Relay