87
Alarm
Code
21
Abnormality of High Pressure Sensor
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The alarm code is ashed on the 7-segment display of the outdoor unit.
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The alarm code is displayed on the wired controller of the indoor unit.
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This alarm code is displayed when output voltage of the high pressure sensor decreases to 0.1V or less, or
increases to 4.9V or more during operation.
TROUBLESHOOTING
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