Page 5
English
n
check all the electrical connections, the connect-
ing cables, and in particular the insulation; replace
worn or damaged cables
n
periodically check the board’s internal wiring
n
do not use cables having an inadequate section or
flying connections, even for limited periods of time
or in an emergency
Prevention of other residual risks
n
make sure that the connections to the unit conform
to the instructions provided in this manual and on
the unit’s panelling
n
if you have to disassemble a piece, make sure that it
has been properly mounted again before restarting
the unit
n
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
n
keep a fire extinguisher fir for electrical appliances
near the machine
n
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
n
remove and leak of fluid inside and outside the unit
n
collect the waste liquids and dry any oil spillage
n
periodically clean the compressor compartment, to
remove any fouling
n
do not store flammable liquids near the unit
n
do not disperse the refrigerant and the lubricating
oil into the environment
n
weld only empty pipes; do not approach flames or
other sources of heat to refrigerant pipes
n
do not bend/hit pipes containing fluids under pres-
sure
2.6 Precautions during maintenance
operations
Maintenance operations can be carried out by author-
ised technicians only.
Before performing any maintenance operations:
n
disconnect the unit from the mains with the external
disconnecting switch
n
place a warning sign “do not turn on - maintenance
in progress” on the external disconnecting switch
n
make sure that on-off remote controls are inhibited
n
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:
n
work with the electrical board open only for the nec-
essary time
n
close the electrical board as soon as the measure-
ment or check has been completed
n
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:
n
do not scatter the fluids of the refrigeration circuit in
the surrounding environment
n
when replacing an eprom or electronic cards, use
always suitable devices (extractor, antistatic brace-
let, etc.)
n
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
n
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”
n
contact manufacturer for any modifications to the
refrigeration, hydraulic or wiring diagram of the
unit, as well as to its control logics
n
contact manufacturer if it is necessary to perform
very difficult disassembly and assembly operations
n
use only original spare parts purchased directly
from manufacturer or the official retailers of the
companies on the recommended spare parts list
n
contact manufacturer if it is necessary to handle the
unit one year after its positioning on site or if you
wish to dismantle it.
Safety
Summary of Contents for AQVC 105
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