Abnormal point and detection method
Judgment and action
Case
Check Code
3
Pipe temperature
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A-Control Service Tool SW2 setting
Temperature display of indoor liquid pipe
Indoor 1
Temperature display of indoor liquid pipe
Indoor 2
Temperature display of indoor condenser/
evaporator pipe Indoor 1
Temperature display of indoor condenser/
evaporator pipe Indoor 2
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Abnormal refrigerant circuit
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These detected errors will not be
cancelled until the power source is
reset.
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When this error occurs, be sure to
replace the 4-way valve.
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To avoid entry of moisture or air into
refrigerant circuit which could cause
abnormal high pressure, purge air in
refrigerant circuit or replace refrigerant.
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