Electrically Testing The Unit - Samsung RC090MHXEA Installation And Maintenance Manual

Electrically testing the unit

It is possible to test each component one after another using a service function. You can use
this to make sure you have wired everything correctly.
To access service mode press blue set button and test button together for 5 seconds.
The controller will display TEST.
Press the top left button the unit will
run the pump.
Press weekly to test the immersion
heater in the hot water cylinder
Press grey set button to test the
backup boiler
Press the lock button to test the hot
water valve
Press the top left button to open the
heating valve 1
Press the std eco power button to
open the heating valve 2
Using the blue view button you can see 5 temperature sensors, inlet and outlet to the heat
exchanger, the red sensor (where used), water tank and sensor in the remote controller.
(After you have set all the field settings) If you have wired in an external run signal /
thermostat when this is operating heat 1 or heat 2 will be displayed when it is operated.
To exit service mode press and hold cancel delete for 5 seconds
www.samsungehs.co.uk Hendra – June 2013 10