CombiSteel 7480 Serie Mode D'emploi page 15

Failure List:
N.B. In case of every failure concerning the electronic equipment, expect for the non-starting, first of all check
that the parameters have been correctly programmed (see the instructions in the corresponding handbook).
The electronic control panel and the electronic instrument are provided with an inner alarm that signals the
probe failures, the pressure switch tripping (only on the electronic control panel) and the bad programming of
the parameters. These mistakes appear on the display through special codes indicated on the specific
instrumentation manual.
If on the display an indication appears which is not an alarm code, a temperature indication or a signalling of
particular working conditions, programmed through the parameters (e.g. "dEF" during the defrost), it means that
the instrumentation is damaged and you have to replace it.
Normally this failure is due to electrical noises which prevent the working of the microprocessor that control the
electronic control panel functioning. For this reason we suggest following the instructions about the positioning
of the cables of the units described at chapter 4 "ELECTRIC CONNECTION".
Nr.
Failure
1 Units supplied with electronic
control panel) After having
connected the supply cable and
pushed the (ON-OFF) button, the
electronic control panel does not
start.
2 (Units provided with instrument)
After having connected the supply
cable and pushed the main switch,
the lamp lying on the switch and the
instrument do not switch on.
3 (Units provided with instrument)
After having pushed the main switch,
the lamp lying on the switch
switches on, but the electronic
instrument remains off.
Causes
Voltage lack or incorrect
voltage on the supply line.
The voltage monitor is
executing the counting (See
chapter 7 -
COMMISSIONING).
The electronic control panel
is supplied correctly, but it
does not start.
Voltage lack or incorrect
voltage on the supply line.
The main switch is broken.
Voltage lack or incorrect
voltage on the supply line.
The fuse of the auxiliary
circuit is blown.
The voltage monitor is
executing the counting (See
chapter 7 -
COMMISSIONING).
The electronic instrument
transformer is broken.
The electronic instrument is
broken.
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Remedies
Control if the supply voltage
corresponds with that indicated on
the label of the unit.
Wait about 10 minutes. If after this
interval, the conditions have not
changed, control if the voltage has
the correct value and if the monitor
fuses are efficient; if the fuses are
blown, replace them.
The connection between the
electronic control panel and the
keyboard is interrupted: restore the
connection.
The electronic control panel is
broken: it is necessary to replace it.
Control if the supply voltage
corresponds with that indicated on
the label of the unit.
Replace the switch.
Control if the supply voltage
corresponds with that indicated on
the label of the unit.
Replace the fuse.
Wait about 10 minutes. If after this
interval, the conditions have not
changed, control if the voltage has
the correct value and if the monitor
fuses are efficient; if the fuses are
blown, replace them.
Replace the transformer.
Replace the instrument.
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