Publicité
Les langues disponibles
Les langues disponibles
Installation Guide
8.3 Troubleshooting HE
Problem
Too little or no heat.
HS supply temperature
too high.
Noise in system.
Too high HS return
temperature.
8.4 Disposal
© Danfoss | DCS-SGDPT | 2022.01
EvoFlat 4.0 Flat Stations for apartments, single- and multi-family houses
Possible cause
Strainer in supply line clogged.
The filter in the energy meter clogged.
Defective differential pressure controller.
Defective temperature sensors.
Automatic controls, if any, wrongly set or defective
— possibly power failure.
Pump out of operation.
The pump is set at too low speed of rotation.
Air pockets in the system.
Defective radiator valves.
Defective TPC-M controller, alternatively differential
pressure controller. The controller does not react as
it should according to the instructions.
Pump pressure too high.
Noice from radiator valves.
Mass flow below the control range
Too small heating surface/too small radiators
compared to the total heating requirement of the
building.
Poor utilization of existing heating surface.
Defective sensor on self-acting thermostat.
The system is single pipe loop.
Pump pressure too high.
Air in system.
Defective or incorrectly set radiator valve(s).
Single pipe loop systems require special one-pipe
radiator valves.
Dirt in the differential pressure controller.
Defective motorized valve, sensor or automatic
controller.
Disposal
This product should be dismantled and its compo-
nents sorted, if possible, in various groups before
recycling or disposal.
Always follow the local disposal regulations.
Solution
Clean strainer(s)
Clean the filter
Replace main controller, TPC
Replace thermostat
Check if the setting of the controller is correct —
set coorectly or replace
Check if the pump is receiving power and that it
turns. Check if there is air trapped in the pump
housing. See pump manual
Set the pump at higher speed of rotation.
See pump manual.
Vent the system throughly — see the instruction
Check — replace
Replace TPC-M controller
Adjust pump to a lower level.
Check flow direction.
Reduce the spread and thereby increase the mass
flow
Increase total heating surface.
Make sure the heat is distributed evenly across
the full heating surface — open all radiators and
keep the radiators in the system from heating up
at the bottom. It is extremely important to keep
the supply temperature to the radiators as low
as possible, while maintaining a reasonable level
of comfort.
The system should be equipped with electronic
controls and return sensors.
Set the pump at a lower speed of rotation.
See pump manual.
Vent the system throughly — see the instruction
Check — set/replace.
Check — clean out.
Check — replace.
AN40274706699301-010101 | 15
EN
Publicité
