Samsung RC160MHXEA Installation And Maintenance Manual page 14

Starting it up in heating mode:
Turn up your thermostats to send a run signal to the unit, the pump will start immediately, a
little house with a circle round it appears in the status window, when the compressor starts
after 3 minutes, you will see the symbol for the compressor in the status screen. It's a little
milk churn with a c in it.
The pipework will begin to heat up, check the flow temperature by pressing blue view button
once, the temp of the flow is shown next to a symbol of a house in a circle. Over time this will
warm up, now check all the radiators or U floor loops are hot as well.
E911 and compressor not running,
E911 means the water is not moving
fast enough to push the paddle switch.
If you look into the flow meter you can see the flow in litres per
minute. In this picture you can see a flow rate indicated, this
shows 25l/min NOT 35l/min
The flow switch trips out at 15l/min, if the flow drops below this
E911 shows.
Check:
The flow rate MUST is over 17l/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,
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 you manually open the hot water 2 way valve check the flow rate again, if you can only
reach 16l with the heating and hot water open together it's a sure sign the pump you have
installed is too small.
If you think the flow switch is faulty, (it very rarely is) remove the paddle from the water by
undoing the red nut, you will need to block up the hole temporarily. Now run the pump again
switch your stats down then up again. After 3 mins of pump operation and holding the flow
switch the outdoor unit will start, don't rush the system it takes time
Rattling flow switch / Cavitation
E911 fault could be caused by a rattling flow switch. This can usually be heard but can also
be felt by holding the flow switch. To correct it use a screwdriver or pliers on the top of the
Flow meter and turn the ball-o-fix valve from 12 o'clock to 1 o'clock; this deflects the water
flow & should further reduce the rattle.
Flow meter in 1 o'clock positioning:
www.samsungehs.co.uk ©G Hendra January 2015 14