7
T-154 0-240°C protection relays
TECSYSTEM S.r.l ®
13) LAMP TEST
It is advisable to carry out this test on a regular basis to ensure all lamps are functioning
normally. Pressing the TEST key at any time allows the user to test all lamps
14) ALARM RELAYS TEST
All relays may be tested using the following procedure.
Press and hold the TEST key for 5 seconds. Initially all LED’s illuminate, changing to the
main screen display flashing TST.
Release the test key when the yellow relay test LED illuminates.
The screen display will show the relay selected for testing and the respective LED will be
illuminated.
The relays to test will be indicated on the display by:
• “Fan” :cooling relay
• “Flt” :Pt100 fault relay
• “Alr” :alarm relay
• “trP” :trip relay
Use the Scroll UP or DOWN keys to make the selection. Press the SET key to perform the
test on the selected relay. To reset press the RESET key.
To discontinue operation and revert to normal operation, press the TEST key.
At the start of the test, a timer is automatically initiated which reverts the unit to normal op-
eration if no inputs are detected for a period of five minutes.
15) ALARM RELAY EXCLUSION
The alarm relay will change contact state when the alarm set point temperature value is
reached. An illuminated alarm LED provides indication of the affected channel. To reset
the relay contact, press the RESET key. The alarm LED corresponding to the affected
channel will start flashing to indicate that an alarm temperature value has been reached. If
the set point alarm value is exceeded up to a value of 5 °C below the set trip threshold, the
alarm relay will change contact state again and the alarm LED will illuminate. Once again
press the RESET key to reset the relay contact. When the trip set point temperature value
is reached, the trip relay will change contact state and both the yellow alarm and the red
trip LED’s illuminate.
16) IMPORTANT NOTICE
Before conducting the insulation test, disconnect the power supply to the unit to
avoid damage.
If any lamp is not functioning the unit must be returned for repair.
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