Ceia THS - Self-Diagnosis

THS – FI022GB2K8v3 --- V - MAINTENANCE
85
Self-diagnosis
The internal diagnostic system monitors the operational status of the metal detector. If a fault is detected, the following
are activated in addition to a message on the display:
• the illuminating alarm indicators
• the buzzer (if activated)
• the fault relay (if Fault relays parameter is ON)
• flashing light (if Fault relays parameter is ON)
Fault status can only be reset by eliminating the cause of the fault.
Table V-2
Message Probable cause Action
Test time out Time-out for pre-programmed
test.
Carry out the test
Fault: power Power-supply section faulty Contact service technician
Fault: probe Antenna connection broken Contact service technician
Fault: ejection ** Ejection of material not
carried out
• Check that the ejection times are correct.
• Check that the ejector is not blocked
• Check photocell operation (positioning, connections
etc.)
• Check the Confirm Ejection input connections
When the cause of the fault has been eliminated, press the
E key to reset the alarm status.
Bin full Storage container full Empty it
Press E key to reset the alarm status
Fault: communication Fault in communication
between SCD and ALM cards
Check that the power-supply voltage is stable and
corresponds to the values on the identification plate.
Check the wiring
If the wiring is correct, replace the cards
Fault: motor alarm
("motor alarm" indicator
activated)
Overloading of the belt motor
Wrong setting of CU
parameter
Remove the cause of overloading and press E key.
Set a proper value of CU parameter and press E key.
Fault: air pressure Compressed air pressure too
low
Check the compressed air connection.
When the cause of the fault has been eliminated, press the
E key
Photocell fault *** Photocell malfunction or pack
stuck in front of photocell
• check there is no pack stuck in front of the photocell
• check the photocell connections
• Check the positions of the photocell and the
retroreflector
• replace the photocell
When the cause of the fault has been eliminated, press the
E key to reset the alarm status ****
Memory card not
installed (THS system
not operative)
Memory faulty or absent Check presence and connections of the SPM external
memory card (see para. "Replacement of SCD card"
Compatibility error SCD card incompatible with
the data stored in the SPM
memory card
Use compatible SCD card (ask service personnel)
*Enabled by the Fault relays parameter
**Enabled by the Ejection confirmation parameter
*** Enable via the PHOTO Alarm parameter
**** The self-diagnosis message may appear:
- in the case of a conveyor belt without encoder or with Power Control Box, with the belt stopped or moving
- in the case of a conveyor belt without encoder or with Conveyor Control System, with the belt moving
The system is not designed to signal a pack which is stuck for some reason in front of the photocell. For this
reason, when the system can detect whether or not the conveyor belt is moving (i.e. when it is equipped with an
encoder or with the Conveyor Control System power supply unit), the self-diagnosis function gives an alarm only if
the photocell is in a state of malfunction when the belt is moving.
On systems without encoder or with the Control Power Box, it is the installer’s and operator’s responsibility to
ensure that material does not remain in front of the photocell when the belt is stopped: if it does, the photocell
will be continuously active even though it is not malfunctioning. If the foregoing situation can not be avoided, it is
advisable to disable photocell self-diagnosis (Parameter PA)