CombiSteel 7480 Serie Mode D'emploi page 16

4 The electronic control panel
starts, the compressor led
blinks and the compressor
does not start.
5 Units supplied with electronic
control panel) The alarm led
is on and the unit is not
working with any indication.
6 The compressor does not
start, even though the
corresponding led is on.
Compressor protection counting:
wait any minutes, then the
compressor should start again.
Pressure switch tripping.
(Wall-mounting and Bi Block units
forms 4 and 5) The compressor
fuses are blown.
(Units provided with instrument)
Pressure switch tripping.
The electric components of the
compressor supply are damaged
(only regarding the monophase
compressors).
Tripping of the compressor inner
protection.
www.combisteel.com
Units supplied with electronic
control panel) If, after any minutes,
this situation persists, check the
connection of the door micro switch
cable or the efficiency of the door
micro switch. Make sure that the
cold room door is well closed as
well.
If even after the restoring of the
normal conditions the unit does not
start, check the efficiency of the
pressure switch. As concerns the
units provided with low pressure
switch, check if gas comes out from
the unit, if that is the case find the
leak and repair the failure.
Change the fuses, checking if the
cause can be due to an electric
failure regarding the compressor
motor.
Pressure switch tripping.
Check the efficiency of the relays,
the condensers and the clixon and,
in case they are damaged, change
them.
(Wall-mounting and Bi Block units
forms 4 and 5) Check the efficiency
of all the compressor fuses and, if
blown, replace them.
Control the supply line, i.e. check if
the voltage is correct, if the contacts
of the compressor contactor are
efficient and if the electric
components of the monophase
compressor are in good condition. In
case some anomalies are found out,
restore the optimum working
conditions.
Check that the condenser fans
(besides the eventual control
pressure switch or speed regulator)
are working well. If they are broken,
change them.
Check that the condenser is
perfectly clean, should that not be
the case, clean it following the
instructions of the paragraph
"MAINTENANCE".
Make sure that gas does not come
out from the unit; if there is a gas
leak, find it and repair the failure.
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