Page 5
English
Safety
to the instructions provided in this manual and on
the unit’s panelling
Q
if you have to disassemble a piece, make sure that
it has been properly mounted again before restar-
ting the unit
Q
do not touch the delivery pipes from the compres-
sor, the compressor and any other piping or com-
ponent inside the machine before wearing protec-
tive gloves
Q
keep a fire extinguisher fir for electrical appliances
near the machine
Q
on the units installed indoor, connect the safety
valve of the refrigeration circuit to a piping network
that can channel any overflowing refrigerant out-
side
Q
remove and leak of fluid inside and outside the unit
Q
collect the waste liquids and dry any oil spillage
Q
periodically clean the compressor compartment, to
remove any fouling
Q
do not store flammable liquids near the unit
Q
do not disperse the refrigerant and the lubricating
oil into the environment
Q
weld only empty pipes; do not approach flames or
other sources of heat to refrigerant pipes
Q
do not bend/hit pipes containing fluids under pres-
sure
2.6 Precautions during maintenance
operations
Maintenance operations can be carried out by au-
thorised technicians only.
Before performing any maintenance operations:
Q
disconnect the unit from the mains with the external
disconnecting switch
Q
place a warning sign “do not turn on - maintenance
in progress” on the external disconnecting switch
Q
make sure that on-off remote controls are inhibited
Q
wear suitable personal protective equipment (hel-
met, safety gloves, goggles and shoes etc.)
To carry out any measurements or checks which re-
quire the activation of the machine:
Q
work with the electrical board open only for the
necessary time
Q
close the electrical board as soon as the measure-
ment or check has been completed
Q
for outdoor units, do not carry out any operations
in the presence of dangerous climatic conditions
(rain, snow, mist etc.)
The following precautions must be always adopted:
Q
do not scatter the fluids of the refrigeration circuit in
the surrounding environment
Q
when replacing an eprom or electronic cards, use
always suitable devices (extractor, antistatic brace-
let, etc.)
Q
to replace a compressor, the evaporator, the con-
densing coils or any other weighty element, make
sure that the lifting equipment is consistent with the
weight to be lifted
Q
in air units with independent compressor compart-
ment, do not access the fan compartment unless
you have disconnected the machine by the discon-
necting switch on the board and you have placed
a warning sign “do not turn on - maintenance in
progress”
Q
contact manufacturer for any modifications to the
refrigeration, hydraulic or wiring diagram of the
unit, as well as to its control logics
Q
contact manufacturer if it is necessary to perform
very difficult disassembly and assembly operations
Q
use only original spare parts purchased directly
from manufacturer or the official retailers of the
companies on the recommended spare parts list
Q
contact manufacturer if it is necessary to handle the
unit one year after its positioning on site or if you
wish to dismantle it.
AQL_AQH 20-75_EN new.indd 5 8-10-2009 9:30:16
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