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12. OPERATION ANOMALIES
12.1. GENERAL ANOMALIES
Anomaly
Cause
Solution
Diffi cult to start.
Reduced power supply voltage.
Insuffi cient static torque of
motor.
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.
Insuffi cient airfl ow.
Insuffi cient pressure.
Blocked pipes and/or inlet points
closed.
Fan obstructed.
Filter overloaded.
Insuffi cient rotation speed.
Exchanger package blocked.
Clean inlet tubes.
Clean fan.
Clean or replace fi lter.
Check power supply voltage.
Clean the exchanger.
Reduction in
performance after a
period of acceptable
operation.
Leaks in the circuit before and/
or after the fan.
Damaged roller.
Check the circuit and restore original con-
ditions.Check the impeller and if necessary,
replace with an original spare part.
Contact the
S&P
post sales service.
Insuffi cient performan-
ce of the exchanger.
Fins dirty.
Clean the exchanger.
Formation of frost on
the exchanger.
Outside air below -5ºC.
Insertion of post-heating devices (anti-ice).
Contact the
S&P
Customer Advice service.
Air pulsation.
Fan working in fl ow conditions
almost 0.
Flow instability, obstruction or
bad connection.
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.
There is water inside
the unit.
Drain clogged or wrongly
dimentioned.
Check if exists a body/object obstructing the
passage of water and remove it. Verify that the
drain trap exists and is correctly sized accor-
ding to the instructins of this manual.
12.2. LIST OF ALARMS
If an alarm is activated or an error occurs, the red LED on the right button will fl ash.
The blinking of the red LED can be combined with green fl ashes which refer to the by-pass working
mode.
