Sanyo UHX1252, UHX2452, UHX0752 E06 Alaral rm Alarm code, Alarm E04 occurs, E12 Alarm Alarm code

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Trouble Diagnosis

3. W-2WAY ECO-i Alarm Codes

E06 Alaral rm

Alarm code	E06
Alarm meaning	Outdoor unit failed to receive serial communication signals from indoor unit.
Alarm conditions	Outdoor unit failed to receive serial communication signals from indoor unit.
Probable cause	(1) The indoor unit power was cut OFF after initial communications were completed.
	(2) An open circuit or short circuit occurred in the inter-unit control wiring after initial
		communications were completed.
Check	Check the power at the indoor and outdoor units, and check the inter-unit control wiring.
Correction	—
Example	—
Notes	This alarm is detected after initial communications are completed. Therefore, it does not occur in
	cases of “disconnected serial connector,” “no terminal unit set,” or other trouble that occurs
	before initial communications are completed. If initial communications have not been completed,
	alarm E04 occurs.
E12 Alarm
Alarm code	E12
Alarm meaning	Automatic address setting start is prohibited.
Alarm conditions	Automatic address setting was started when automatic address setting was in progress at
	another outdoor unit in the same link.
Probable cause	Automatic address setting is in progress at another outdoor unit.
Check	This alarm is not displayed on the remote controller. Therefore check the blinking
	on the outdoor unit PCB.
Correction	Wait for automatic address setting to be completed at the outdoor unit where it is currently in
	progress. Then start automatic address setting again.
Example
Notes
E15 Alarm
Alarm code	E15
Alarm meaning	Automatic address setting alarm (too few units)
Alarm conditions	The number of indoor units was too few when automatic address setting was performed.
Probable cause	(1) The number of indoor units set at the indoor unit quantity setting SW (No. of I/U: S004, S005)
		on the outdoor unit PCB is too many.
	(2) The inter-unit control wiring between indoor units has been cut.
Check	(1) Refer to the test run servicing materials and check the indoor unit quantity setting SW (No. of
		I/U: S004, S005).
	(2) Check the inter-unit control wiring at the indoor and outdoor units.
Correction	After correcting the indoor unit quantity setting or the inter-unit control wiring, perform automatic
	address setting again.
Example	—
Notes	W-2WAY ECO-i switch position

S004

S005

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