Samsung RC090-120-140 Installation And Maintenance Manual page 18

Caution in Cold weather
If the water in the system is below 10C the heat pump WILL NOT START.
Press the blue view button, you can see 4 sensor readings, press it until the pump symbol
shows (a circle round a house). This is the water temperature, if it's below 10C the unit will
not start but the pump will run.
You must warm up the water to get the unit to run, the easiest way to do this is to run the
immersion in Test mode (page 13) to warm up the cylinder first, by manually cranking open
the HW valve you can prime the heat pump with the warm water coming back from the
cylinder.
If everything is cold less than 5C (the remote controller, the water, the tank etc.) the unit will
not operate correctly, it can't understand how the house has got so cold. You will find the on
off button for heating won't work and if you try to use HW mode it will switch itself off. You
need to allow the unit to warm up first. Make sure the remote controller is in a heated room.
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