Sanyo 2-WAY ECO-i SPW-C0705DXHN8 Service Manual page 122

4. W-2WAY ECO-i Alarm Codes
E16 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
E20 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
5
E24 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
E16
Automatic address setting alarm (too many units)
• The number of indoor units was too many when automatic address setting was performed.
• After initial communications were completed, an unrecognized unit was detected.
(1) The number of indoor units set at the indoor unit quantity setting SW (S004, S005) on the
outdoor unit PCB is less than the number set.
(2) The inter-unit control wiring is wired incorrectly.
(1) Refer to the test run servicing materials and check the number of indoor units that is set.
(2) Check the inter-unit control wiring at the indoor and outdoor units.
After correcting the indoor unit quantity setting or the inter-unit control wiring, perform automatic
address setting again.
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—
E20
No indoor units at automatic address setting.
When automatic address setting was performed, no indoor units were recognized.
(1) The inter-unit control wiring from the outdoor unit to the indoor units has been cut.
(2) Serial connector 1 (CN001) is disconnected at the outdoor unit.
(3) The power is OFF at all indoor units in the system.
(1) Check whether the inter-unit control wiring from the outdoor unit to the indoor units is cut.
(2) Check whether serial connector 1 (CN001) is disconnected at the outdoor unit.
(3) Check the power at the indoor units.
(1) Reconnect the inter-unit control wire from the outdoor unit to the indoor unit.
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Position of serial connector CN001 on W-2WAY ECO-i
E24
Outdoor unit (INV) failed to receive communications from other outdoor unit (constant-speed).
After initial communications were completed, communications from an outdoor unit stopped.
(1) After initial communications were completed, the control wiring between main and sub
outdoor units was cut.
(2) After initial communications were completed, the outdoor unit power was turned OFF.
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—
—
—
CN001
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W-2WAY ECO-i SYSTEM
Trouble Diagnosis