Oil level detective circuit system error

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Cause of operation

[H16]		Oil level detective circuit system error			1. Detachment of TK2 sensor, miscabling,
			(Auxiliary code : 02)		characteristics error of resistance value
					2. Oil-equalization circuit error
					(Check valve, capillary clogging,
					strainer clogging)
					3. Refrigerant stagnation in compressor
					shell

Is not TK2 sensor detached?			YES			Correct installation of sensor.


	NO
	NO

						Correct miscabling/misinstallation.
						Correct miscabling/misinstallation.
Is there no miscabling or misinstallation			YES			TK1: CN514
Is there no miscabling or misinstallation						TK2: CN515
on TK1/TK2/TK3/TK4 sensors?						( TK3: CN516 )
						( TK3: CN516 )
	NO		NO			TK4: CN523
	NO

Are characteristics of TK2 sensor
Are characteristics of TK2 sensor						Sensor error
resistance value normal?			Outdoor unit temp sensor characteristics-4			Sensor error
resistance value normal?
	YES
	YES
			YES

Does OCR of MG-SW operate?						Reset OCR manually.( 2)


	NO
	NO
After power reset				Error
				Error
Start a test operation in COOL or HEAT mode.						Replace clogging part.
Start a test operation in COOL or HEAT mode.						Replace clogging part.

TK2 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [12] [2].

Check TK2 sensor temp approx. 10 minutes after compressor 2 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of strainer of oil-equalization circuit,					Compressor 2
clogging of capillary, or malfunction of check valve is considered.					Compressor 2


	No error
					Strainer
				Capillary tube
					TK2
Check the clogging of SV3E valve.		Error		Oil tank
(*1)		1 Refer to item [H07] error.
		1 Refer to item [H07] error.
	No error


Check I/F P.C. board			Replace SV3E valve.

2 If OCR operates even after manual reset of OCR, check whether the wiring to the current sensor (T02) of Comp-IPDU is correct or not.

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Cause of operation

[H16]	TK3 temperature detective circuit error			1. Detachment of TK3 sensor, miscabling,
		(Auxiliary code : 03)		characteristics error of resistance value
				2. Error of SV3C valve circuit periphery
				(Check capillary clogging, strainer
				clogging)
				3. Refrigerant stagnation in compressor
				shell

		YES
Is not TK3 sensor come off?		YES			Correct installation of sensor.


	NO
	NO

					Correct miscabling/misinstallation.
					Correct miscabling/misinstallation.
Is there no miscabling or misinstallation		YES			TK1: CN514
Is there no miscabling or misinstallation					TK2: CN515
on TK1/TK2/TK3/TK4 sensors?					( TK3: CN516 )
					( TK3: CN516 )
	NO	NO			TK4: CN523

Are characteristics of TK3 sensor
					Sensor error Replace

resistance value normal?		* Outdoor unit temp sensor characteristics-4
resistance value normal?
YES
YES
	After power reset,
	check capillary choke of SV3C valve bypass.
			Error
Start a test operation in COOL or HEAT mode.			Error		Replace clogged part (Capillary).

TK3 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [13] [2].

Check TK3 sensor temp approx. 10 minutes after compressor 2 has operated.			Strainer
If low temperature continues (approximately outside temp) or temperature			Strainer
does not almost change, a clogging of parallel capillary is considered.
	No error			SV3E valve
	No error

			TK3
		Error
Check the clogging of SV3E valve.
				Replace SV3E valve.

(Note 1)		(Note 1) Refer to item [H07] error.
(Note 1)
	No error
	No error


Check I/F P.C. board

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[H16]