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VR 300 ECV/B Operation and maintenance instructions
206788 (12-02-2010)
8 Systemair AB
GB
Troubleshooting
Should problems occur, please check or correct the items below before calling your service representative.
1. Fan(s) do not start
Check that all fuses and plugs are connected (mains supply and fan plugs).
2. Reduced airflow
a) Check setting of airflow on control panel
b) Change of filter required?
c) Cleaning of diffusers/louvers required?
d) Cleaning of fans/exchanger block required?
e) Is roof unit/air intake clogged?
f) Duct system. Check visible duct runs for damage and/or build-up of dust/pollution.
g) Check diffuser/louver openings.
3. Cold supply air
a) Check set supply air temperature on the control switch "D", (Fig.1)
b) Check if fire thermostat is still alert. If necessary, reset by pressing the red button in the unit
(Fig.9).
Fig.9
c) Check if the extract filter must be changed.
d) Check that the heat exchanger is rotating
4. Noise/vibrations
a) Clean fan impellers
b) Pull the fans out and check that screws holding the fans are tightened.
Service
Before calling your service representative, make a note of the item no.(pos 1, fig11) and production
number (pos. 2, fig. 10) from the type label, which can be found on top of the unit.
Fig.10
1
2
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