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14 - MAINTENANCE
R-410A refrigerant leak detector (optional)
The gas detector sensor is a device that signals leaks in refrigerant.
This sensor is installed next to the supply fan. In case of alarm,
it is reset manually.
Maintenance:
■ Annual testing: it is necessary to carry out
testing every year.
■ Every 5/6 years: it is recommended that the
gas detection element be replaced.
Note: Check the documentation attached to the
leak detector for taring and calibration testing.
Active recovery (optional)
■ A cooling recovery circuit is optionally available for these
units (BA and BB assemblies). It is a complete circuit with
independent electronic control. The circuit is composed of:
- Return EC plug-fan.
- Air circuit comprised of coils with copper pipes and aluminium
fi ns.
- Electronic expansion valve.
- Hermetic scroll-type compressor assembled over antivibration
mounts.
- Crankcase heater.
- Four-way cycle reversing valve.
- Anti-acid dehydrator fi lter.
- High and low pressure transducers.
- Condensates drain pan.
■ The same recommendations for the maintenance of the
components of the main circuits must be followed for the
components of this circuit.
Dryer fi lter
■ The fi lter function is the preserve the cooling circuit clean and
without humidity, neutralizing the acids that can be found in
the cooling circuit.
■ Measure the diff erence in the temperature of the pipes at the
dryer inlet and outlet.
■ If necessary, replace.
Filter dryer
Compressors
in tandem
Use safety gloves for this task. Take care with the sharp
parts of the coil.
Air coil
■ Check that the coil is free from dust and grease.
■ Cleaning the accumulated dust on the coil can be performed
using a soft-bristled brush or a vacuum cleaner perpendicular
to the fi ns or with a low-pressure water cleaner. Grease can be
removed with water with degreaser. Do not put stress on the
fi ns as they could deform.
Outdoor coil protection grid (optional)
A protective grid can be fi tted to the coil.
This grid, fi xed with M6 Allen screws, must be removed to
clean the coil.
Condensate drain pan
■ These units are equipped with a
condensate drainage pan sloped
toward the drain. This pan is removable
for easy cleaning. It is secured to the
unit using 4 M6 Allen screws.
■ Check that the condensate pan is
suffi ciently clean.
■ Check that the drain is not clogged.
■ Cleaning of the pan can be done with water and non-abrasive
detergent.
M6 Allen
screws
Supply fan in «In-line» units
■ The terminal block of the motor is accessed from the outdoor
unit. For that the next panel must be removed:
M6 Allen
screws
Access
panel
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