Samsung RC090MHXEA Installation Manual page 18

Testing the backup boiler operation.
Using the field settings you have set the heat pump to heat the house when it is warmer than
3 C outside, below 3c the boiler takes over the heating.
You need to test this works
Start the unit operating in heating mode using the heat pump
On the back of the heat pump outdoor unit is a black temperature sensor, it looks like a tube;
you need to put this in a glass of ice and water to convince the unit that the outdoor
temperature has fallen.
Once it registers the temperature falling below 3C the heat pump will stop. A symbol of a milk
churn with a B in it will appear in the right hand side of the status window on the Samsung
remote controller.
A run signal should now be being sent to the combi boiler which should fire up, it should start
its pump and the 2 port valve for the combi should be open.
There may be a period of up to 6 minutes where the heat pump is also operating, please wait
and the heat pump will switch itself off.
Once this all works you need to warm up the temperature sensor on the back of the heat
pump to convince the unit to restart.
NOTE the heat pump wont restart at 3 C it restarts 3 degrees higher than the set temperature
so in this case at 6 C.
www.samsungehs.co.uk ©G Hendra September 2014 18