Troubleshooting - Danfoss Akva Lux II TDv Mounting And Installation Manual

Instructions
13. TROUBLE SHOOTING - HEATING
Fundamental
In the event of disruptions to operation, you should fundamentally - before commencing the actual troubleshooting - check
whether:
• the system is correctly connected
• the district heating supply temperature is at its normal level
• the differential pressure is at its normal level. Ask your district
heating supplier if necessary
Problem
No heat
Uneven distribution of heat
Poor cooling
No heat
Danfoss District Energy
Akva Lux II TDv
• there is a power supply to the system - pump and automatics
• the dirt strainer in the district heating supply pipe is clean
• there is air in the system (if the system is vented)
Possible cause
Dirt strainer in the district heating or
heating return line clogged.
Filter in district heating meter clogged.
Defective or incorrectly set differential
pressure controller.
Air pockets in the system.
Air pockets in the system.
Insufficient heating surface / radiators
too small compared to the total heating
requirement of the building.
Poor utilisation of the existing heating
sursurface.
Air pockets in the system.
145X2085 / AQ428255318526en-010101
Solution
Clean the filter/dirt strainer.
Cean the filter (in consultation with the
district heating plant).
Check the functions of the differential
pressure controller - if necessary, clean the
valve seat.
Vent the system thoroughly - see the
instructions.
Vent the system thoroughly - see the
instructions.
Increase total heating surface.
Turn on all radiators and prevent the
radiators in the system from becoming
warm at the bottom.
Vent the installation thoroughly - see the
instructions.
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DKDHR