Panasonic WH-UD07CE5-A - Relationship between the Condition of the Air-To-Water Heatpump Indoor and Outdoor Units and Pressure and Electric Current

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17.2. Relationship Between The Condition Of The Air-to-Water Heatpump
Indoor And Outdoor Units And Pressure And Electric Current
• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
Heating Mode Cooling Mode
Condition of the
Air-to-Water Heatpump
indoor and
outdoor units
Low Pressure High Pressure Electric current
during operation
Low Pressure High Pressure Electric current
during operation
Water leakage or
insufficient water flow
rate in the system
Excessive amount of
refrigerant
Inefficient compression
Insufficient refrigerant
(gas leakage)
Outdoor heat exchange
deficiency
Clogged expansion valve
or Strainer