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• Causes and corrections in instances when automatic address setting cannot be started.
• Causes and corrections in instances when automatic address setting starts, but cannot be completed successfully.
• If alarm E15, E16, or E20 appears after automatic address setting is started, check the following items.
The power LED on the outdoor unit control PCB does not turn ON.
Trouble
Trouble
Cause and correction
Cause and correction
LED 1 and 2 on the outdoor unit control PCB do not turn OFF when 
the outdoor unit power is turned ON, and automatic address setting 
cannot be started.
Check for any errors in the power wiring to 
the outdoor unit, and check for a missing 
phase.
Check the "Alarm Displays" table and 
correct the problem.
Check that the remote controller wiring 
and the inter-unit control wiring are 
connected correctly.
Check that the indoor unit power is ON.
An alarm appears on the remote controller sometime from several 
seconds to several minutes after automatic address setting is started.
LED 1 and 2 on the outdoor unit control PCB indicate that automatic 
address setting is in progress (the LEDs blink alternately) for several 
minutes after automatic address setting is started (the compressors 
may also start and stop several times), however LED 1 and 2 never 
indicate that automatic address setting is completed (turn OFF).
Check the "Alarm Displays" table and 
correct the problem.
Check the alarm details on the "Outdoor 
Unit Control PCB LED 1 and 2 Alarms" 
table, then check the "Alarm Displays" 
table and correct the problem.
E15
E16
E20
The total capacity of indoor units is too lower than that of outdoor unit.
The total capacity of indoor units is too higher than that of outdoor unit.
The outdoor unit received no serial signals from indoor units within 90 seconds after automatic 
address setting was started.
4-15.  Self-Diagnostics Function Table
Alarm descriptionAlarm display
An alarm appears immediately when automatic address setting is 
started from the remote controller.
Nothing happens when the operator attempts to start automatic 
address setting from the remote controller.
SM830231-02Single欧州.indb46SM830231-02Single欧州.indb46 2014/09/0921:15:482014/09/0921:15:48