DC1100 / DC1400 displays identical temperatures for all connected Sensors. It is not uncommon for a temperature of 39 deg C to be displayed for each Sensor connected to the Controller.

Issue

DC1100 / DC1400 displays identical temperatures for all connected Sensors.  It is not uncommon for a temperature of 39 deg C to be displayed for each Sensor connected to the Controller.

Product Line

Field Devices

Environment

DC1100 Stand Alone Optimiser / Compensator Controller

DC1400 Stand Alone Optimiser / Compensator Controller

Sensors compatible with DC1100 :-

A701 Room Temperature Sensor

A702 Outside Air Temperature Sensor

A703 Pipe Temperature Sensor

A704 Contact Temperature Sensor

STC 600 D Contact Temperature Sensor           (Original Drayton Sensor = A704)

STO 600 D Outside Air Temperature Sensor      (Original Drayton Sensor = A702)

STP 600 D Pipe Temperature Sensor                 (Original Drayton Sensor = A703)

STR 600 D Room Temperature Sensor              (Original Drayton Sensor = A701)

Sensors compatible with DC1400 :-

STC 600 Contact Temperature Sensor               (Original Satchwell Sensor = DST)

STO 600 Outside Air Temperature Sensor          (Original Satchwell Sensor = DOT)   

STP 660 Pipe Temperature Sensor                     (Original Satchwell Sensor = DWT)

STR 600 Room Temperature Sensor                  (Original Satchwell Sensor = DRT)

39 deg C.

Cause

DC1100 / DC1400 displays identical temperatures for all connected Sensors.  A Sensor temperature of 39 deg C is a common value displayed.

Resolution

  1. Check each Sensor is correctly connected to its appropriate "Common" Terminal of the DC1100 / DC1400 Wiring Base
  2. Check each Sensor Cable Screen is correctly connected to the Earth Terminal of the DC1100 / DC1400 Wiring Base
  3. Check that a good Earth connection exists between the Earth Terminal of the DC1100 / DC1400 Wiring Base and the site Earth
  4. Check that a good site Earth is available for connection to the DC1100 / DC1400 Wiring Base.

N.B.

In the event that the DC1100 / DC1400 continues to display identical temperatures for all connected Sensors following completion of the above checks then it is suggested that the Cold Start procedure is applied to the Controller and the result observed.