Samsung RC090MHXEA Installation And Maintenance Manual page 12

Starting it up in heating mode:
If you have two port valves you should find the heating
valves are open and the hot water valve closed. If you
have a 3 port valve it should be open to heating mode.
Check that the correct (heating valve is open and the
hot water is closed, if it's wrong check your wiring)
Start the unit my Pressing heating on off button (top left
inside the door) to start the unit, set the mode to heating
(sun symbol)
Set the desired water temperature i.e. 50C using the up
and down buttons.
Flow Switch and E911 READ THIS
When the pump is running a little house with a circle around it in the status window of the
controller.
The unit wants to see 14 l / min flow to activate the flow switch, if there is not enough flow a
E911 fault will show every 15 seconds
Check:
The flow rate on the flow meter it MUST be over 15l/min
The flow switch is connected to the PCB of the control box
The flow switch is round the right way you can turn the head, there is an arrow
All valves are open.
The pump speed is set at highest
There is no air in the system
There is water in the system
If none of this works you need a bigger pump or its air locked
To clear the fault stop and start the machine again with the button on the remote controller.
After 3 mins of pump operation the outdoor unit will start, don't rush the system it takes time
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 add a cylinder and use the immersion to warm up
the cylinder first, the warm water from the cylinder will preheat the
heat pump and it will start to operate. For more info see page 13.
Set up the bypass valve with radiators
In heating mode check the unit is pushing water into the heating circuit only. Open the bypass
valve fully, if you are not sure set it to its lowest setting. Now close every radiator on the
system except one.
Using the flow meter check the flow rate is above 15/l to avoid E911 faults. Adjust the bypass
valve to achieve this. If 911 occurs clear the fault switching the unit on and off at the remote.
The bypass is set now open the rads again.
Set up the bypass valve with U floor heating
In heating mode check the unit is pushing water into the heating circuit only. Open the bypass
valve fully, if you are not sure set it to its lowest setting. If 911 occurs clear the fault switching
the unit on and off at the remote.
Using the flow meter check the flow rate is above 15/l to avoid E911 faults. Adjust the bypass
valve to achieve this. If 911 occurs clear the fault by sending an off and then an on command
to the unit. Reset the power to the ufloor manifold to do this.
The bypass is set now turn up the wall stats again.
www.samsungehs.co.uk Hendra – August 2013 12