Fault Finding - Thermo Scientific DSP2 Installation And Operation Manual

If the detector senses a system fault the fault LED will turn on, the
fault relay will change state and a fault message will be displayed at
the top menu. Press the fault button display to access a description
of the fault. If there is more than one fault, press next fault to view
the next fault description. The following is a description of the type
and source of faults which can occur:
Search head Fault
Search head fault can occur for the following common reasons:
Search head cable connection has been broken.
Examine the cable connections at both ends to make sure that all wires are connected correctly. Refer to the
Installation Section for assistance.
The oscillator reference levels may be out of range.
The oscillator references can be measured by the detector under status/service data. Reference A and
reference B should both be within the following range: 100 +/- 20.
Search head balance may be out of range.
Again, this may be monitored using the volt meter feature under service data. The balance number displayed
should be below 200.
Contact Goring Kerr for further assistance in troubleshooting.
RF Board Fault
This fault is a result of the RF board not responding to DSP requests. Common causes: 24 volt supply has failed. Check the 24
volt fuse in the power supply (F7); or control panel failure. Cycling power may clear fault.
Reject Confirm Fault
This fault results when reject confirm has been enabled and the confirmation signal has failed to return within the prescribed time
period. This could be a result of reject device failure, a slow reject action, or reject confirm device (switch, etc.) failure. Check
the reject device action, make sure the reject confirm switch is operating properly. It may be necessary to adjust the reject
confirm time window -Path: Rejects/Setup/Special/Reject Confirm/Confirm Time.
Battery Low Fault
This indicates that the battery which is powering the memory when power is off is excessively low. Battery voltage could be
checked in the control panel and the battery and/or control panel could be replaced. This does not affect the unit operation as
long as power is maintained. ( Battery voltage > 3.0 volts )
Product Memory Fault
This indicates that the product memory has been lost or damaged. Low battery condition could cause the memory to be lost
when the unit is not powered. In applications where the detector has been subjected to high static discharges or lightning, the
memory may have been corrupted. It will be necessary to erase memo ry (Path: Setup/Product Library/Erase All Products). Prior
to erasing memory it may still be possible to record critical settings such as the application parameters, sensitivity, reject
settings, etc.
Photo Reject Fault
This fault will occur if photo reject has been enabled and a detection has taken place when the photo eye was not blocked in the
right sequence. Check the photo eye alignment, make sure the product is breaking the beam, and check for reasons for false
triggering such as metal in the belt. Perform a complete test of the detector including the reject device.

Fault Finding

Fault Light Will
Turn 'On'
FAULT
LEARN
PRODUCT
FUNCTION
41
Status Sensitivity
photoeye block
Product: 1 Sens: 100
Product Peak: 20
Setup Rejects: 0
Figure 33
DETECT
ALARM
RESET
TEST
EXIT