Montage- und Betriebsanleitung / User manual
VXe SLS
© Danfoss | Produced by Danfoss Redan A/S | 2022.03 | 39
AQ40514397064001-000101
145X2068
16. TROUBLESHOOTING HE
Too high DH return temperature.
Too small heating surface/too small
radiators compared to the total
heating requirement of the building.
Increase total heating surface.
Poor utilization of existing heating
surface.
Defective sensor on self-acting
thermostat.
Make sure the heat is distributed
evenly across the full heating sur-
face – open all radiators and keep
the radiators in the system from
heating up at the bottom. It is ex-
tremely important to keep the sup-
ply temperature to the radiators as
low as possible, while maintaining a
reasonable level of comfort.
The system is single pipe loop.
Das System sollte mit elektronis-
chen Reglern und Rücklauffühlern
ausgestattet sein.
Pump pressure too high.
Pumpe niedriger einstellen.
Air in system.
System entlüften.
Defective or incorrectly set radiator
valve(s). Single pipe loop systems re-
quire special one-pipe radiator valves.
Check – set/replace.
Dirt in the differential pressure
controller.
Check – clean out.
Defective motorized valve, sensor or
automatic controller.
Check – replace.
Noise in system.
Pump pressure too high. Noice from
radiator valves.
Adjust pump to a lower level. Check
flow direction.
Heat load too high.
Defective motorized valve, sensor or
electronic controller.
Check – replace.
Disposal
This product should be dismantled and its components
sorted, if possible, in various groups before recycling
or disposal.
Always follow the local disposal regulations.
