Energy Plus
44
TROUBLESHOOTING
Unit starts up with difficulty
Insufficient air flow
Insufficient pressure
The air flow
decreases after
a reasonable period
of operation
(see above)
Temperature
of air supply air
temperature too low
Insufficient
performance
of the heat exchanger
Formation of ice
on the heat exchanger
Leaking and/or dripping
of water from the casing
Low power supply voltage
Clogged ducted system
and/or extraction points
Pressure drops
upstream and/or downstream of the fan
External air below -5°C
Build-up of dirt
on the fins of the heat exchanger
External air below -5°C
Clogged siphon
Missing or improperly fitted siphon
Damaged impeller
Formation of frost on the exchanger
Underestimated pressure drops
Insufficient rotation speed
Dirty filter
Clogged heat exchanger
Check the voltage
against that on the engine’s rating plate
Clean the ducted system and the intake point
Check the connections and casing of the unit
and restore the initial conditions
Use a post-heating device
Clean the heat exchanger
Use a preheating device
(heater to protect against freezing)
Clean the siphon
Set up a siphon to standard
Check the impeller.
Replace with an original spare part, if necessary
Assess the use of the preheating coil
Double-check the operating point
on the graph of the recovery unit
Check and recalibrate
the operating voltage of the fans
Clean or replace the filter media.
Note: always use original filter media
to guarantee the efficiency of the unit
Clean the mouth of the heat exchan
Malfunction
Possible causes
Corrective action
