40
11. OPERATION ANOMALIES
ANOMALY
CAUSE
SOLUTION
Difficult to start.
Reduced power supply voltage.
Insufficient static torque of motor.
Check motor specification plate.
Close the air inlets to reach the maximum speed.
Change the motor is necessary.
Contact the
S&P
Post-Sales service.
Insufficient airflow.
Insufficient pressure.
Blocked pipes and/or inlet points closed.
Fan obstructed.
Filter overloaded.
Insufficient rotation speed.
Exchanger package blocked.
Clean inlet tubes.
Clean fan.
Clean or replace filter.
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 conditions.
Check the impeller and if necessary, replace with an original spare part.
Contact the S&P post sales service.
New air temperature too
cold.
Outside air -5º C or less.
Models (CADB-DI): Thermal protectors
Support resistances open.
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.
Insufficient performance of
the exchanger
Fins dirty.
Clean the exchanger.
Formation of frost on the
exchanger.
Outside air below -5º C.
Insertion of post-heating devices (anti-ice).
Contact the S&P Customer Advice service.
Air pulsation.
Fan working in flow conditions almost 0.
Flow instability, obstruction or
bad connection.
Modification of the circuit and/or replacement of the fan.
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
according to the instructins of this manual.
Only DC versions. Internal breakage
of water coil.
Isolate the battery using the isolation valves.
Repair the leak/ Replace the battery.
Only DC version. The water coil is
being used for cooling purpose with
cold water.
The CADB-N DC heat recovery can be used just for post-heating
function with hot water.
Clean and/or readjust the inlet channels.
Operate the electronic regulator, increasing the minimum speed
(insufficient voltage).
Contact the S&P Customer Advice service.
10.3. DRAINPIPE FOR CONDENSATE
Regularly inspect the drainpipe for condensates to make sure it is not blocked, if this is the case, remove the obstruction.
10.2 HEAT EXCHANGER
The access to the heat exchanger is performed by the bottom (horizontal CADB-N models 05 to 30), for the top part (horizontal models of
CADT-N 45 to 80) and for lateral part (vertical models). Using a screwdriver, remove the access panels to the heat exchanger.
To release the heat exchanger, loosen the screw that
fi
x the heat exchanger to the internal structure.
FALLING OBJECTS
By loosening the screws that hold the panels, they will be released. In units installed in ceiling, pay special
attention to this operation to prevent the fall of panel. During the maintenance signaling the area below the heat
recovery unit and prevent personnel access to it.
3
Not manipulate the heat exchanger for the
fi
nned area.
Summary of Contents for CADB-N-D
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