Intech 21, Inc. Operation and Installation Manual 5

Troubleshooting

The common alarm is initiated during any monitored alarm condition.
Each monitored zone has identical alarms and indicators. Any of the above alarms will result in turning the heater cable on, providing a fail-safe operation. The alarms and indicators definition and description for each zone is as follows:

Indicator

Color /

Mode
Applies to Function

  Power On
  Green /

Steady

  NC-2100

IO-2100
Unit is powered.

  Common
Alarm
  Red /

Steady
  NC-2100
  Any alarm(s), for any zone is indicated. Remote alarm
contacts (SPDT) change state.

  Signal Failure
  Red /

Steady

  NC-2100

IO-2100

  1. Power to zone has been turned off externally.
2. Heating Cable failed.
3. Remote Terminal RT-2100 failed or has been damaged.
4. Power feed (cable and/or connections) have been
      damaged.
5. Contactor contacts or coil failure.

  Heater On
  Green /

Steady

  NC-2100

IO-2100
  Heating cable is powered.

  High
Temperature
  Green /

Blinking

  NC-2100

IO-2100

  High Temperature Set Point has been reached. Possible
causes:

1. Heating cable is oversized for the application.
2. Liquid temperature in the pipe is higher then the
      desing criteria.

  Low
Temperature
  Amber /

Steady

  NC-2100

IO-2100

  Heating cable is powered and monitored temperature
dropped to the low temperature alarm setpoint. Possible
causes:

1. Insulation on the pipe or heated vessel has failed.
2. Heating cable is off the pipe or heated vessel.
3. Temperature sensor is not attached.
4. Insufficient heater cable output for operating
       parameters, pipe and insulation size.

  Sensor Loss
  Amber /

  Blinking

  NC-2100

IO-2100
  Resistive temperature detector connected to the Remote
Terminal RT-2100 has failed or has been damaged.

  Lamp test

Fault reset
  Button   NC-2100   Tests all indicators and resets the Network Controller's
NC-2100 temperature control cycle.

Prev Table of Contents HCCM-2100

Indicator	Color / Mode	Applies to	Function
Power On	Green / Steady	NC-2100 IO-2100	Unit is powered.
Common Alarm	Red / Steady	NC-2100	Any alarm(s), for any zone is indicated. Remote alarm contacts (SPDT) change state.
Signal Failure	Red / Steady	NC-2100 IO-2100	1. Power to zone has been turned off externally. 2. Heating Cable failed. 3. Remote Terminal RT-2100 failed or has been damaged. 4. Power feed (cable and/or connections) have been damaged. 5. Contactor contacts or coil failure.
Heater On	Green / Steady	NC-2100 IO-2100	Heating cable is powered.
High Temperature	Green / Blinking	NC-2100 IO-2100	High Temperature Set Point has been reached. Possible causes: 1. Heating cable is oversized for the application. 2. Liquid temperature in the pipe is higher then the desing criteria.
Low Temperature	Amber / Steady	NC-2100 IO-2100	Heating cable is powered and monitored temperature dropped to the low temperature alarm setpoint. Possible causes: 1. Insulation on the pipe or heated vessel has failed. 2. Heating cable is off the pipe or heated vessel. 3. Temperature sensor is not attached. 4. Insufficient heater cable output for operating parameters, pipe and insulation size.
Sensor Loss	Amber / Blinking	NC-2100 IO-2100	Resistive temperature detector connected to the Remote Terminal RT-2100 has failed or has been damaged.
Lamp test Fault reset	Button	NC-2100	Tests all indicators and resets the Network Controller's NC-2100 temperature control cycle.