Sanyo KHX0752, UHX2452, UHX0752 L06 Alarm Alarm code, L10 Alarm Alarm code, L17 Alarm Alarm code

Trouble Diagnosis

3. W-2WAY ECO-i Alarm Codes

L06 Alarm

Alarm code	L06
Alarm meaning	Duplicated indoor unit priority (alarm at non-priority indoor units and outdoor unit)
Alarm conditions	Multiple indoor units set as the priority unit were detected in the system.
Probable cause	More than one indoor unit is set as the priority unit in the system.
Check	Find the indoor units in the system where alarm L05 has occurred.

Correction	Refer to the description of alarm L05.
Example	—
Notes	Alarm L06 occurs as a result of alarm L05. Therefore, correcting the duplicated priority
	settings will also correct alarm L06.
L10 Alarm
Alarm code	L10
Alarm meaning	Outdoor unit capacity not set
Alarm conditions	The outdoor unit capacity has not been set, or the setting is not allowed by the system.
Probable cause	This alarm occurs because the capacity has not been set.
Check	Connect the outdoor unit maintenance remote controller. On the outdoor unit EEPROM detailed
	setting mode screen, check the value for the outdoor unit capacity (item code 81). Check that it is
	not set to “0” or to a capacity that is not allowed.
Correction	If item code 81 is incorrect, use the outdoor unit maintenance remote controller and set it
	correctly.
	* After changing the setting, be sure to reset both the indoor and outdoor power.
Example	—
Notes	The outdoor unit maintenance remote controller is required in order to set the capacity in the
	outdoor unit EEPROM.
L17 Alarm
Alarm code	L17
Alarm meaning	Outdoor unit model mismatch
Alarm conditions	This alarm occurs when a unit other than a R410A refrigerant model is connected.
Probable cause	(1) A unit that uses R407C refrigerant, or a R22 model unit, was connected by mistake.
	(2) The connected unit is correct, however the refrigerant type setting in the outdoor unit
	EEPROM (item code 80) is incorrect.
Check	(1) Check the refrigerant type at the connected unit.
	(2) Use the outdoor unit maintenance remote controller and check the item code 80 refrigerant
	type. If the setting is incorrect, change it to R410A.
Correction	—
Example	—
Notes	The outdoor unit maintenance remote controller is required in order to set the refrigerant type in
	the outdoor unit EEPROM.
L18 alarm
Alarm code	L18
Alarm meaning	4-way valve operation failure
Alarm conditions	During heating operation (Comp. ON), the highest detected temperature at an outdoor unit heat
	exchanger (EXG 1, EXG 2, EXL1, or EXL2) was 68°F (20°C) or more above the outdoor air
	temperature (Air Temp.) continuously for 5 minutes or longer, or the detected suction temperature
	(SCT) was 68°F (20°C) or more above the outdoor air temperature continuously for 5 minutes or longer.
Probable cause	(1) The 4-way valve connector (20S CN060) has become disconnected from the control PCB.
	(2) The 4-way valve circuit is locked (mal functioning).
Check	(1) Check the 4-way valve connector (20S CN060).
	(2) If the connector is normal, check the 4-way valve wiring and the PCB circuit.
Correction	If the connector is normal, correct or replace the problem locations.
Example	—
Notes	—

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