FI002K0018v1100UK – THS/21 Instruction manual for installation, use and maintenance
5
MAINTENANCE
ORIGINAL INSTRUCTIONS 145
5.3 Troubleshooting
All the power supply voltages in the power supply card are protected by self-resetting fuses which can be activated if
there is an overload or faulty connection, for the voltage values on the card, except for the mains voltage. Refer to
the description of the inputs and outputs.
The THS systems have a self-diagnosis system which displays error messages, strictly related to
the operation of the Metal Detector or to controls activated on the system input lines. For these
messages, refer to the Self-diagnosis section.
For fault conditions not indicated because of faulty electrical installation or configuration of the
Metal Detector, see the following tables:
The control panel display is not
on
Green and red indicators off, internal
siren activated
Check that the SCD card is correctly connected to the ALM card. If the
problem persists, contact Assistance Service.
Green and red indicators off, internal
siren not activated
If the Metal Detector is capable of expelling metal masses, check that
the RCU card is correctly connected to the ALM card; otherwise check
the state of fuse F10 (and F11/F12 for Conveyor Control System) and
that the power supply voltage is within the permitted range.
Green and red indicators on
Check the connections between the SCD card and the ALM card.
Disconnect all the devices connected, switch off the system and switch it
on again after a few minutes, if self-resetting protective devices have
been activated. If the problem persists, contact Assistance Service.
The Metal Detector does not
provide alarms when test
samples are used
Sample does not have the right diameter
for the current product
Set the default product and create a new one. Check that the samples
are detected, if necessary by increasing the sensitivity value. If they are
detected, samples with a bigger diameter must be used for the current
product; otherwise contact Assistance Service.
Incorrect detection parameters
for current product
Check that the correct product has been selected; otherwise repeat the
Autolearn procedure for the product setting automatic selection of
sensitivity and, for THS/xMS21 or THS/3F systems, automatic selection
of the detection mode or band, respectively.
For Control Power Box systems without an encoder, check that the
product transit speed is compatible with the corresponding parameters
set.
The Metal Detector provides
false alarms without the
passage of the product
Electrical or mechanical disturbances
With the settings for normal operating conditions, perform the
Environmental Compatibility Check procedure. If the source of the
disturbance is not identified, see below.
Metal Detector malfunction
Disconnect all the devices connected to the Metal Detector. If possible,
connect it to a different power supply and earth source, in an
atmosphere free of possible sources of interference.
If the disturbance remains the same, contact Assistance Service.
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