Sanyo DHX4852, UHX2452, UHX0752, UHX1252, UHX3652 Contents of Remote Controller Switch Alarm Display

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Trouble Diagnosis

1. Contents of Remote Controller Switch Alarm Display

		ON:	Blinking:						OFF:
			Wired					Wireless
			remote
				remote controller
			control
					receiver display
			display
	Possible cause of malfunction
					Operation				Timer	Standby for heating
Serial	Remote controller is	Error in receiving serial communication signal.
	detecting error signal from	(Signal from main indoor unit in case of group control)
communication			<E01>
errors	indoor unit.	Outdoor system address, indoor unit address, or indoor unit					Operating
		address independent/main/sub unit setting has not been made.					lamp blinking
Mis-setting
		(Auto address is not completed.)
		Error in transmitting serial communication signal.	<E02>
	Indoor unit is detecting error signal from remote controller and system controller.		<<E03>>
	Indoor unit is detecting error	Error in receiving serial communication signal.
	signal from outdoor unit.	When turning on the power supply, the number of connected	E04
		indoor units does not correspond to the number set. (Except R.C.					Heating ready
		address is “0.”)
							lamp blinking
		Group wiring failure of indoor units in the refrigerant system
		(occurring when remote controller is operated immediately after
		automatic address setting)
	Outdoor unit is detecting error	Error in receiving serial communication signal.
	signal from indoor unit.	There is an indoor unit which does not send signals when the	E06
		power is ON.
	Improper setting	Indoor unit address setting is duplicated.	<<E08>>
		Duplicated remote controller “main” setting.	<<E09>>				Operating
							lamp blinking
	Improper setting	Automatic address setting start is prohibited.
		AP pin was short-circuited at time when automatic address setting	E12
		was started.
	Indoor unit communication	Error of main indoor unit in receiving serial communication signal	E18
	error of group control wiring.	from sub indoor units.
	During auto. address setting,	Number of connected indoor units is less than the number set.	E15
	number of connected units
		Number of connected indoor units is more than the number set.	E16
	does not correspond to
							Heating ready
	number set.	No indoor unit is connected during auto. address setting.	E20
							lamp blinking
		Main outdoor unit is detecting error signal from sub outdoor unit.	E24
		Duplicated outdoor unit address.	E25
		Mismatch in “No. of outdoor units” setting.	E26
		Error of sub outdoor unit in receiving serial communication signal	E29
		from main outdoor unit.
	Improper setting	Connected indoor unit is not a multi unit.	<<L02>>
		Duplication of main indoor unit address setting in group control.	<L03>
		Duplicated indoor unit priority (priority indoor unit).	L05			Operating and heating
		Duplicated indoor unit priority (non-priority indoor unit) and
			L06	ready lamps blinking
		outdoor unit.		simultaneously
		Group control wiring is connected to individual control indoor unit.	L07
		Indoor unit address is not set.	L08
		Capacity code of indoor unit is not set.	<<L09>>
		Mismatch of outdoor unit type.	L17
		Duplication of outdoor R.C. address setting.	L04			Operating and heating
				ready lamps blinking
				simultaneously
		Capacity code of outdoor unit is not set.	L10
Thermistor	Indoor unit	Indoor coil temp. sensor (E1)	<<F01>>			Operating and timer
fault		Indoor coil temp. sensor (E3)	<<F03>>			lamps blinking
						alternately
		Indoor suction air (room) temp. sensor	<<F10>>
		Indoor discharge air temp. sensor	<<F11>>
								Continued

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