Troubleshooting - TECSYSTEM T2612 Instruction Manual

TECSYSTEM S.r.l ®
PROBLEMS
The unit will not switch on,
with control power energized.
Channel 4 is indicating fault and displaying
FOC.
Only three Pt100 sensors are connected.
One of the 4 channels is indicating fault
and displaying FOC/FCC
When switching the unit on-off, the alarm
and trip relays energize.
All the sensors are displaying FCC.
The temperature indicated by one or more
channels is wrong.
Sudden activation of the trip relay with
normal operating temperature.
One channel caused the occurrence.

TROUBLESHOOTING

CAUSES / SOLUTIONS
Check the terminal block for correct instal-
lation.
Check for voltage at the terminal block.
Wrong programming of the unit.
Repeat programming.
Check the sensors connection.
Look for damaged sensors.
Replace damaged sensor.
Strong electrical noise is being picked up
on the power line.
Check to ensure the shield of the sensor
cable is connected to the panel ground.
Install shielded cable (Mod. CT-ES) or
twist the sensor conductors.
Wrong wiring connections.
The terminal block is upside-down.
The sensors are defective.
Check the sensor resistance with an Ohm-
meter.
The unit is calibrated incorrectly.
Return for repair.
Sensor defective (Fcd).
Replace the sensor.
T2612 UNI
9