Trouble Shooting; Troubleshooting - Heating - Danfoss Akva Lux II TDP-F Instructions For Installation And Use Manual

Instructions for installation and use

14.0 Trouble shooting

If operating disturbances occur, the following basic features
should be checked before carrying out acual troubleshooting:
- the substation is correctly connected,
- the district heating supply temperature is at the normal level
(summer at least 60 °C, winter at least 70 °C),
- the differential pressure is higher than or equal to the normal
(local) differential pessure in the district heating network. - If
in doubt, ask the district heating plant,

14.1 Troubleshooting - Heating

Problem
No heat
Uneven heat distribution
Supply temperatur too low
Poor cooling
32 DKDHR
Akva Lux II TDP-F
- the substation is connected to electricity (pump and
automatic,
- the dirt strainer in the district heating supply pipe is clean,
- air pockets in the system.
Possible cause
Dirt strainer clogged on DH or HE side
(radiator circuit.
Filter in district heating meter clogged.
Defective or wrongly set differential
pressure controller.
Defective room thermostat / actuator
Air pockets in the system.
Air pockets in the system.
Dirt strainer clogged
Too small heating surface / too small
radiator in relation to the total heating
requirement of the building
Poor utilization of existing heating
surface
VI.HE.A1.02
Solution
Clean dirt strainer.
Clean the filter (after consulting the
district heating plant).
Check the functioning of the differential
pressure controller - clean valve seat if
required.
Check the funtioning of the room ther-
mostat / actuator
Vent the installation throughly.
Vent the installation throughly.
Clean dirt strainer
Increase total heating surface
Turn on all the radiators and prevent the
radistors in the system from becoming
warm at the bottom.
Danfoss District Energy