Nibe VEDEX 4000 - Troubleshooting Guide; Fan Impeller Rotation Fault; Smoke Emission Fault; Low Output and Temperature Issues

28 VEDEX 4000
Troubleshooting
Fault Cause Correction
The fan impeller rotates in the
wrong direction
wrong cable connection check with electric scheme
Smoke pours through the door faulty glass cord replace the sealing cord
adjust the door hinges
the nozzle is clogged do not burn small pieces of wood
or sawdust
small chimney draught fault in the chimney
the door is not completely closed close the boiler door
Boilers do not achieve the required
outputs and set water temperature
lack of water in the heating system rell
a high pump output adjust the pump ow and switching
the boiler output is not su󰀩ciently
sized for the water system
adjust/change the installation
low-quality fuel use only dry wood with moisture
content below 20%
leaking ring-up safety valve repair
small chimney draught a new chimney, check and change
connection, to low exhaust fan rota-
tion
strong chimney draught position the throttle into the smoke-
ue (draught limiter), to high ex-
haust fan rotation
bent blades of draw-o󰀨 ventilator wrong exhaust fan assembly,
straighten the blades (to 90° angle)
long ring-up of the boiler Incorrect ring, incorrect settings in
the controller, faulty exhaust fan
insu󰀩ciently cleaned boiler clean
clogged combustion air hole in the
burning chamber
clean
The ventilator does not rotate clogged impellor remove the tar and deposits from
the ventilator
faulty capacitor replace
faulty engine replace
Water inside burning chamber the wood is too moist use only dry wood with moisture
content below 20%
set temperature is too low increase set temperature of the
boiler
temperature of return water is too
low
use safety valve to protect return
from too low temperature
Temperature of the boiler body is
high
opened boiler door close the boiler door
No power No power check the power in outlet
check the plug and cord