Sanyo AHX0752, UHX2452, UHX0752, UHX1252, UHX3652, UHX1852 Heat exchanger 1 gas temp. sensor F06

Trouble Diagnosis

1. Contents of Remote Controller Switch Alarm Display

		ON:	Blinking:					OFF:
			Wired					Wireless
			remote
				remote controller
			control
					receiver display
	Possible cause of malfunction		display
						Operation			Timer	Standby for heating
Thermistor	Outdoor unit	Compressor 1 (INV) discharge temp. sensor	F04
fault		Compressor 2 (constant speed) discharge temp. sensor	F05
		Compressor 3 (constant speed) discharge temp. sensor	F22
		Outdoor air temp. sensor	F08
		Heat exchanger 1 liquid temp. sensor	F07				Operating and				timer
		Heat exchanger 1 gas temp. sensor	F06			lamps blinking
						alternately
		Compressor intake temp. sensor (suction temp)	F12
		High-pressure sensor	F16
		Low-pressure sensor	F17
		Heat exchanger 2 liquid temp. sensor	F24
		Heat exchanger 2 gas temp. sensor	F23
Ceiling panel connection failure			<<P09>>			Timer and heat
Protective	Indoor unit	Thermal protector in indoor unit fan motor is activated.	<<P01>>			ready lamp blinking
device		Float switch is activated.	<<P10>>			alternately
		Fan inverter protection function activated.	<<P12>>
		O2 sensor activated	P14
	Outdoor unit	Compressor 1 (INV) discharge temp. trouble	P03
		High-pressure switch	P04
		Reverse phase (missing phase) detected.	P05
		DCCT, ACCT overcurrent (compressor less than 80 Hz)	P16				Operating and heat
		Compressor 2 (constant speed) discharge temp. trouble	P17
						ready lamp blinking
		Compressor 3 (constant speed) discharge temp. trouble	P18			alternately
		Outdoor unit fan trouble	P22
		DCCT, ACCT overcurrent (80 Hz or more)	P26
		Start failure caused by compressor wire missing phase, DCCT	P29
		failure, or similar problem (INV compressor start failure).
Failure of nonvolatile memory IC (EEPROM) on indoor unit control PCB					Operating and					timer
					lamp blinking
			F29		simultaneously
Failure of nonvolatile memory IC (EEPROM) on outdoor unit control PCB					Operating and					timer
					lamp blinking
			F31		simultaneously
Protective	Overload current detected.	Compressor 2 (constant speed)	H11
		Compressor 3 (constant speed)	H21
device
	Lock current detected.	Compressor 2 (constant speed)	H12
		Compressor 3 (constant speed)	H22
	No current detected when	Compressor 1 (INV)	H03
	compressor was ON.	Compressor 2 (constant speed)	H13			Timer lamp blinking
		Compressor 3 (constant speed)	H23
	Discharge temp. sensor	Compressor 2 (constant speed)	H15
	trouble
		Compressor 3 (constant speed)	H25
	Outdoor unit protection	Low-pressure trouble	H06
	Outdoor unit protection	HIC trouble alarm	H31
Connection failure of oil detection sensor		Compressor 1 (INV)	H08
		Compressor 2 (constant speed)	H27
		Compressor 3 (constant speed)	H28
Fusing of electromagnetic contact (Current detected when compressor was OFF)			only blinking	(No display changes)
Automatic backup operation
<< >> alarm indication: Does not affect the operation of other indoor units.

<> alarm indication: In some cases may affect the operation of other indoor units.

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