Function; Operation Mode; Defrost Control - Fujitsu WPYA100LA Service Manual

UNIT

Operation mode

Cold water mode.
Hot water mode.
Inverter control
Inverter control reduce the ON/OFF times of compressor, so
can keep the water temperature changeless during opera-
tion.
Electricity consumption
Inverter control can operate with less electricity consumption
than normal air to water heat pump.

Defrost control

Defrosting operation is controlled by the temperature of
outdoor heat exchanger sensed by the thermistor.
Anti-freezing control for the circulation water
Anti-freeze operation automatically starts when the outdoor
temperature is lower than 2°C.
Time delay safety control
Restarting is inhibited for approximately 3 minutes.
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FUNCTIONS