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17.2 Relationship Between the Condition of the Air Conditioner and Pressure
and Electric Current
Condition of the
air conditioner
Cooling Mode Heating Mode
Low Pressure High Pressure
Electric current
during operation
Low Pressure High Pressure
Electric current
during operation
Insufficient refrigerant
(gas leakage)
Clogged strainer, expansion
valve or capillary tube
Short circuit in the indoor unit
Heat radiation deficiency
of the outdoor unit
Inefficient compression
• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
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