COMEM DTI Інструкція з експлуатації - Сторінка 15
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Diagnostic
The device is provided of the thermic probes diagnostic function.
The condition controlled on the measured input are:
• Probe PT100 interrupted: signalling on the display the message O P E (open).
• Probe in short circuit: signalling on the display the message S H R
(short circuit).
• Probe out of order for wrong read temperature: signalling on the display the
message F D C.
When the device switches on the auto-diagnostic, FAULT relay commutes and
it remains in the energized status until one of the above-described conditions
appears, or if a device failure occurs, or if the power supply is absent.
The anomaly conditions are signalled also by the FAULT led on.
Every time that a probe is out of order because it is interrupted (OPE) or in short
circuit (SHR) or the delta of temperature is too elevated (FDC), the corresponding
channel LED flashes until the anomaly stop.
The alarm of interrupted probe (SHR) or open probe (OPE) will be reset automa-
tically while the alarm for the delta of temperature (FDC) disappears by pressing
this sequence:
• push the ENTER key
• keep it pressed
• press the →+ key at least for 5 seconds.
The status of the relay contact (all available with exchange contact) is showed in
the following table:
RELAY
ALARM
TRIP
FAN
FAULT
DISABLE STATUS
OFF: closed 29-30
OFF: closed 32-33
OFF: closed 35-36
OFF: closed 38-40
ENABLE STATUS
ON: closed 29-31
ON: closed 32-33
ON: closed 35-37
ON: closed 38-39
UNPOWERED STATUS
closed 29-30
closed 32-33
closed 35-36
closed 38-39
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