S&P CADB-HE ECOWATT Series Manual page 71

8. OPERATION ANOMALIES
8.1. GENERAL ANOMALIES
Anomaly
Diffi cult to start.
Insuffi cient airfl ow.
Insuffi cient pressure.
Reduction in
performance after a
period of acceptable
operation.
New air temperature
too cold.
Insuffi cient performance
of the exchanger.
Formation of frost on
the exchanger.
Air pulsation.
There is water inside
the unit.
Cause
Reduced power supply voltage.
Insuffi cient static torque of motor.
Blocked pipes and/or inlet points
closed.
Fan obstructed.
Filter overloaded.
Insuffi cient rotation speed.
Exchanger package blocked.
Leaks in the circuit before and/or
after the fan.
Damaged roller.
Outside air -5º C or less.
Models (CADB/T DI): Thermal
protectors Support resistances
open.
Fins dirty.
Outside air below -5ºC.
Fan working in excessively low
fl ow conditions.
Flow instability, obstruction or
bad connection.
Drain clogged or wrongly
dimentioned.
Only DC versions. Internal
breakage of water coil.
Only Dc version. The water coil is
being used for cooling purpose
with cold water.
Solution
Check motor specifi cation plate.
Close the air inlets to reach the maximum speed.
Change the motor is necessary.
Contact the S&P Post-Sales service.
Clean inlet tubes.
Clean fan.
Clean or replace fi lter.
Check power supply voltage.
Clean the exchanger.
Check the circuit and restore original conditions.
Check the impeller and if necessary, replace with
an original spare part.
Contact the S&P post sales service.
Insertion of post-heating resistances.
Contact the S&P post sales service.
Reset by pushing the button RESET, all the
thermal protectors of the resistance.
Clean the exchanger.
Insertion of post-heating devices (anti-ice).
Contact the S&P Customer Advice service.
Modifi cation of the circuit and/or replacement of
the fan. Clean and/or readjust the inlet channels.
Operate the electronic regulator, increasing the
minimum speed (insuffi cient voltage).
Contact the S&P Customer Advice service.
Check if exists a body/object obstructing the pas-
sage of water and remove it. Verify that the drain
trap exists and is correctly sized according to the
instructins of this manual.
Isolate the battery using the isolation valves.
Repair the leak/ Replace the battery.
The CADB-HE DC heat recovery can be used just
for post-heating function with hot water.
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