Yearly Controls; Section 7 - Breakdown Diagnostic; Section 8 - Dismantling - MAXA OTA micro 15 Manuel Utilisateur

6.4 Yearly controls

• Verification of the whole electrical installation and in particular the tightening of the cable connections.
• Verification of the tightening of all bolts, nuts, flanges and water connections that could be loose because of vibra-
tions.

SECTION 7 - BREAKDOWN DIAGNOSTIC

SYMPTOMS
Fans doesn't work:
Motor out of the absorp-
tion:
Excessive air flow:
Insufficient air flow:
Noise:
Strong vibrations:
When the failure cannot be easily solved, you must disconnect the equipment from electrical power and
contact the manufacturer or an authorized technical assistance centre, having care of quoting the identifi-
cation data of the unit that you can find on the correspondent label.

SECTION 8 - DISMANTLING

At the end of their use MAXA Energy units will be disposed of, in observance of the norms in force.
In particular, the European Directive 2002/96/CE about the electric and electronic equipments wastes, prescribes the
waste disposal outside the normal waste flow. The materials of the dismantled units have to be separately picked up
to optimise the recycling of the materials that constitute them and prevent possible damages for health and environ-
ment.
The materials that compose the MAXA Energy units are:
• Galvanized plate
• EPS (expanded polystyrene)
• Polyethylene
• ABS plastic (acrylonitrile butadiene styrene)
• NBR (nitrile butadiene rubber NBR)
27
POSSIBLE CAUSE
No power supply.
The switches of the thermostat are not in the right position of working.
There are foreign bodies that block the rotors.
Electrical connections are released.
Pression is low than what is required and then the air flow is excessive. A possible
solution is to reduce pressure by means of dampers and regulators.
Excessive density of the fluid.
Rotation speed too high.
Pressure drops of the system are overvalued.
Pressure drops of the system are underestimated.
Cloggings in the air ducts.
Rotation speed too low:
verify on the terminal board of the motor that the connection is cor-
rect and that the voltage corresponds to that of the nameplate.
The rotor turns backwards.
Excessive air flow.
Wear or crack in the pads.
Unbalanced fan.
Foreign bodies in the case.
Unbalanced impeller because of wear or of dust deposit.
Sliding of the impeller on the case due to deformations.
Cloggings in the air ducts
OTA micro 15÷50