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Carefully read the “Safety” section of this manual before carrying
out any maintenance operations.
DANGER
Do not discharge the refrigerant into the
atmosphere while the refrigeration circuits
are being drained. Use appropriate recovery
equipment.
When the recovered refrigerant cannot be re-
used, return it to the manufacturer.
DANGER
Do not throw away the waste oil of the
compressor, because it contains refrigerant in
solution.
The waste oil must be returned to the
manufacturer.
Unless otherwise specified, the operations described below may be
carried out only by a trained maintenance operator.
9.1 General requirements
Units have been designed for continuous operation, providing
that they are subjected to regular maintenance, within the limits
specified in this manual. Each unit must be serviced according to the
programme by the User/Customer, and must be inspected at regular
intervals by the personnel of one authorised Service Centers.
It is the responsibility of the User to meet these maintenance
requirements and/or to enter into an agreement with one of authorised
Service Centers, so as to properly safeguard the operation of the
appliance.
During the warranty period, in case of damage or failures caused
by improper maintenance, manufacturer will not refund the costs
incurred to repair the appliance in its original state.
The provisions of this section apply only to standard units; according
to the order requirements, other documentation may be added,
concerning any modifications or supplementary accessories.
9.2 Planned maintenance
Maintenance inspections must be carried out according to the
program below, by a qualified person.
As a general rule, units cannot be repaired directly by the user, who
shall not try to service or repair any failures or anomalies identified
during daily inspections. If you are in doubt, please contact authorised
Service Centre.
9 - Maintenance
Operations
D
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W
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M
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B
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Check the temperature of the leaving
fluid
Check the pressure drops in the heat
exchanger
Check for electric absorption
Check suction pressure and
temperature
Check delivery pressure and
temperature
Check the oil level in the compressor
Check that there are no gas bubbles
in the liquid line
Check the operation of the oil heaters
Check the remote control switches
Check the operation of the LP
pressure switch
Check the operation of the HP
pressure switch
Check the insulation of the heat
exchanger
Check that terminals are tightened
Check that the terminals’ screws are
tightened
Clean the exterior of the unit with
water and soap
Check the density of the antifreeze
(if any)
Check the operation of differential
pressure / flow switches
Check the operation of the solenoid
valve
