7
PROBLEM SOLVING
Problem
Possible cause
Check
Possible solution
Engine in very high
consumption
Operating point different than
expected;
Check the flow rate
and the pressure drop;
Increase a pressure drop in
the installation;
Excess flow;
Fan speed;
Reduce the rotation speed;
Air flow in excess
Air distribution system,
pressure drop overrated;
Check the flow rate
and the pressure drop;
Increase a pressure drop in
the installation;
Fan speed;
Reduce the rotation speed;
Insufficient air flow
Air distribution system,
pressure drop overrated;
Check the flow rate
and the pressure drop; Increase the speed of
rotation (according to
available motor power and
maximum fan speed);
Fan speed;
Clogged filter;
Filter embedding;
Replace filter;
Excessive noise
Flow too high, air speed too
high;
Check the flow rate
and the pressure drop;
Decrease the flow;
Pressure drop too high;
Avoid areas of unstable
performance of the fan;
Damaged bearings, damaged
metal components;
Bearings, condition of
the components;
Replace bearings or
damaged components;
Unbalanced moving
components;
Strange vibrations;
Calibrate/Replace fan;
Unit does not work
Power failure;
Power supply;
Circuit breaker;
Restore power supply;
Rearm circuit breaker;
Low battery
performance
Reduction of working fluid
flow;
Check flow rate;
Regular flow rate;
Low air flow;
Filter embedding;
Replace filter;
Low efficiency of the
recuperator
Dirtiness of the recovery
element;
Cleaning condition of
the recuperator
Clean recuperator
Low air flow;
Filter embedding;
Replace filter;
Excessive wear on
the belt
Incorrect belt tension;
Check tension on the
belts;
Adjust belt tension;
Incorrect pulley alignment;
Check pulley
alignment;
Align pulley;
Note:
Please note that air handling units are integrated into a general system. For this reason, failures may be caused
by other system components, improper interaction between the unit and the system, or environmental conditions
other than those specified for the unit project.
