Ii.11 Maintenance - Hitecsa ADVANCE EWMIM 120 Mode D'emploi

II.10.4.3 Electronic thermostatic valve functioning
The electronic thermostatic expansion valve is calibrated to maintain
the gas superheated suitable to avoid any liquid being sucked into the
compressor. The operator is not called upon to perform calibration since
the control software of the valve monitors these operations
automatically.

II.11 MAINTENANCE

IMPORTANT!
Maintenance is reserved exclusively for skilled personnel from workshops authorised by HITECSA, qualified to operate on
this type of products. Pay close attention to the danger signs on the unit.
Pay the utmost attention to the symbols located on the unit. Use EXCLUSIVELY original HITECSA spare parts.
IMPORTANT!
Always adopt personal protective equipment required by law (glasses, headphones, gloves, etc.).
DANGER!
Always act on the general automatic switch protecting the system before carrying out any maintenance work, even if it is
purely for inspection purposes. Make sure that no one accidentally supplies power to the machine; lock the general
automatic switch iin the zero position.
DANGER!
Pay attention to high temperatures near the compressor heads and the supply pipes of the refrigeration circuit.
Control
General cleaning and checking unit
Finned coils
Fans
Compressor: oil check
Heat exchangers
Water filter
Pre-load pressure of the expansion tank
II.11.1.1 General cleaning and checking unit
It is advisable to perform the general washing of the unit with a damp
cloth every six months.
Always wait every six months to check the general condition of the unit,
in particular to check the absence of corrosion on the unit structure. Any
corrosion must be treated with protective paints in order to prevent
possible damage.
IOM_EWMIM-EWMIMH_120a262_207984_200601_ES-EN-FR-DE-IT
II.10.4.4 Functioning of PA: high pressure switch
After the pressure switch has been triggered, it must be reset manually
by pressing the black button on the pressure switch itself completely
and reset the alarm from the control panel. Refer to the Troubleshooting
section to detect the problem and carry out the necessary maintenance.
Frequency
Every 6 months, the unit must undergo general
washing and its status must be checked
At least every 6 months.
In the case of installation with harsh operating
conditions, increase the frequency of the control.
At least every 6 months.
In the case of installation with harsh operating
conditions, increase the frequency of the control.
Every 6 months
At least every 12 months.
In the case of installation with harsh operating
conditions, increase the frequency of the control.
At least every 6 months.
In the case of installation with harsh operating
conditions, increase the frequency of the control.
At least every 12 months.
II.11.1.2 Cleaning of Finned Coils
The coils must be washed and brushed gently with water and soap.
Remove any foreign bodies from the condensing coils which may block
the passage of air, such as: leaves, paper, debris, and so on.
Replace the coils should it not be possible to clean them.
Failure to clean the coils increases load losses and therefore reduces
overall performance of the unit in terms of its flow arte.
80
Notes
Any points where corrosion is starting need to be
touched up with protective paint.
The coils must be kept clear from any obstructions. If
needed, they must be washed with detergents and
water. Brush the fins gently to keep them from being
damaged.
The fan grilles must be kept clear from any
obstructions. Make sure the motors and fan blades
are clean and that there are no abnormal vibrations.
The 120 ÷ 154 models are equipped with an oil
warning light on the inverter compressor. The 262
model is equipped with an oil warning light only on
the fixed compressor while on the inverter
compressor there is the oil level sensor that
indicates the absence of lubricating oil on the board.
The lubricating oil level in the compressor can be
checked by means of the sight-glass.
Any incrustation of the exchanger may be detected
by measuring the pressure-drop between the inlet
and outlet pipes, using a differential pressure gauge.
It is mandatory to install a mesh filter on the unit's
inlet water piping. This filter must be cleaned from
time to time.
From the specific loading connection on the expansion
tank, you can verify the pre-load pressure (see
Expansion tank technical data).
DANGER!
Pay attention to the lugs and edges of the battery.
ADVANCE