Sanyo CHDZ07263 Service Manual page 70

3. W-3WAY ECO-i Alarm Codes
E25 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
E26 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
1
Correction
Example
Notes
2
E29 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
3
Check
4
Correction
Example
Notes
5
6
7
E25
Outdoor unit address setting failure (duplication)
Communication by the outdoor unit main/sub control wiring was received that contained the
same address as that unit 5 times or more within 3 minutes.
The unit number is set incorrectly.
Check the unit number again.
Correct the incorrect unit number setting.
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Recovery from this alarm occurs automatically (when communication that contains the same
address is not received for 3 minutes).
E26
Mismatch in outdoor unit quantity
After power initialization, the set outdoor unit quantity did not match the number of outdoor units
detected on the outdoor unit main/sub control wiring for 3 minutes or longer.
(1) The outdoor unit quantity is set incorrectly.
(2) The outdoor unit main/sub control wiring is cut.
(1) Check the outdoor unit quantity setting again.
(2) Check the outdoor unit main/sub control wiring.
(1) Correct the incorrect outdoor unit quantity setting.
(2) Repair the outdoor unit main/sub control wiring.
—
Recovery from this alarm occurs automatically (when the set outdoor unit quantity matches the
number of outdoor units detected on the outdoor unit main/sub control wiring).
E29
Outdoor unit (sub) failed to receive signal from outdoor unit (main).
Outdoor unit (sub) communications from outdoor unit (main) were interrupted for 3 minutes or longer.
(1) After initial communications were completed, the outdoor unit main-sub control wiring was
cut.
(2) After initial communications were completed, the RC connector (CN006) became disconnected.
(3) The power at the outdoor unit (main) is turned OFF.
(1) Check the outdoor unit main/sub control wiring.
(2) Check the RC connectors.
(3) Check the power at the outdoor unit (main/sub).
(1) Repair the outdoor unit main/sub control wiring.
(2) Correct the RC connector connection.
(3) Turn ON the outdoor unit (main/sub) power.
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Trouble Diagnosis