20
VUT 300 (301) EV(K) mini EC
Fig. 20. Heat exchanger and filter servicing
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7.
Ductworks inspection (once in 5 years).
Even if you follow all the listed maintenance guidelines, some dust can get accumulated inside
the air ducts and reduce the unit performance. Duct maintenance means their regular cleaning or
replacements.
8.
Control unit maintenance (as required).
Maintenance of the control unit must be performed by a qualified electrician duly authorized
for unassisted electric operations up to 1000 V. Read the user’s manual prior to the control unit
servicing! Cut off power supply to the unit prior to the control unit servicing.
While servicing the control unit follow the operations shown in fig. 21:
1. Remove four screws to take off the protecting cover.
2. Remove the heat exchanger from the unit by pulling its band.
3. Remove the screws that fix control block swivel panel. Hold the swivel panel while detaching it.
4. Move the swivel panel downwards.
