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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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Image 68
Sanyo UHX1252, UHX2452, UHX0752 E06 Alaral rm Alarm code, Alarm E04 occurs, E12 Alarm Alarm code, E15 Alarm Alarm code