CombiSteel 7480 Serie Mode D'emploi page 17

7 Pressing the cold room
light switch the relative
lamp lights up, but the
cold room light remains
off.
8 The unit is working, but
the door heater does
not function. (Only on
the low temperature
units)
9 The requested
temperature cannot be
reached in spite of the
uninterrupted working
of the unit.
10 The evaporator frosts
too much, irregularly or
only in some points.
The supply circuit fuse of the cold
room light is blown.
The lamp inside the cold room has
blown.
The supply circuit fuse of the door
heater is blown.
The heater is broken.
The gas quantity is insufficient.
Gas passage in both ways of the
deflection valve (Wall-mounting
units forms 4 and 5).
The pressure regulating valve is
blocked (low temperature units).
Insufficient condensation.
The correct working or installation
instructions have not been
respected for the following
reasons:

The product has been
introduced in the cold room at
too high a temperature.

In the cold room there are
other sources of heat (e.g.
floor drain mouths, etc.).

The cold room door is opened
too frequently and for too long
a period.

The goods have been placed
too near to the evaporator,
and as a consequence they
obstruct the correct flow of
the air.
The gas quantity is insufficient.
The air circulation on the
evaporator is incorrect.
(Bi Block units forms 4 and 5)
Incorrect regulation of the
thermostatic valve.
www.combisteel.com
Replace the fuse after having checked that
the load connected to the relative cable
has an absorption lower than 200 W.
Change the lamp.
Replace the fuse after having checked that
the load connected to the relative cable
has an absorption lower than 200 W.
Change the heater.
Execute the gas filling up by joining the
manometers, to control the charge.
Control if there are leaks, and in that case
repair them.
It is possible to try to repair the valve,
even if it is better to change it.
Try to calibrate the valve again, even if
probably it is to be replaced.
Clean the condenser. If this is not
sufficient, check that the correct working
conditions of the unit have been
respected.
Restore the optimal working conditions.
Execute the gas filling up by joining the
manometers, to control the charge.
Control if there are leaks, and in that case
repair them.
Check the efficiency of the evaporator
fans and, if broken, change them.
Make sure that there is anything
obstructing, even partially, the air flow at
the exit as well as at the entrance of the
evaporator, if there are obstacles, it is
indispensable to remove them.
Modify the regulation of the thermostatic
valve till obtaining a correct frosting.
17