6 - 7
2WAY SYSTEM
Trouble Diagnosis
6
3. 2WAY Alarm Codes
Alarm code
Alarm meaning
Alarm conditions
Probable cause
(2) An open circuit or short-circuit occurred in the inter-unit control wiring after initial
communications were completed.
Check
Correction
Example
Notes
E06
Outdoor unit failed to receive serial communication signals from indoor unit.
Outdoor unit failed to receive serial communication signals from indoor unit.
(1) The indoor unit power was cut OFF after initial communications were completed.
Check the power at the indoor and outdoor units, and check the inter-unit control wiring.
—
—
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
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
progress. Then start auto address setting again.
Example
Notes
E12
Auto address setting start is prohibited.
Auto address setting was started when auto address setting was in progress at another outdoor
unit in the same link.
Auto address setting is in progress at another outdoor unit.
This alarm is not displayed on the remote controller. Therefore check the blinking on the Outdoor
Unit Control PCB.
Wait for auto address setting to be completed at the outdoor unit where it is currently in
—
—
E15 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause The number of indoor units set at the indoor unit quantity setting SW (SW3, SW4) on the
Outdoor Unit Control PCB is too many.
(2)
Check (1) See the section "7. TEST RUN" and check the indoor unit quantity setting SW (SW3, SW4).
(2)
The inter-unit control wiring between indoor units has been cut.
Check the inter-unit control wiring at the indoor and outdoor units.
Correction
address setting again.
Example
Notes
E15
Auto address setting alarm (too few units)
The number of indoor units was too few when auto address setting was performed.
(1)
After correcting the indoor unit quantity setting or the inter-unit control wiring, perform auto
—
2WAY switch position
SW3
SW4
SM830253-00_欧州2way7_SM-TRSM.indb 7 16/08/02 14:02:49
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