DC1100 / DC1400 Outside Occupation message is displayed and Plant is not operating.

[Product_Support]

Issue

DC1100 / DC1400 Outside Occupation message is displayed and Plant is not operating.

Environment

DC1100 / DC1400 Discrete Controller.

Cause

Heating Time Schedule is in an OFF period.

Remote Override has been activated.

Controller Current Time is incorrect.

Room Sensor does not display a value or is not listed.

Resolution

1. Check Heating Time Schedule OFF time.
   • If Heating Time Schedule OFF time is earlier than the Controller Actual Time then condition displayed is correct.
   • If Heating Time Schedule OFF time is later than the Controller Actual Time then condition displayed is incorrect.
2. Check presence of Drayton DC1100 Remote Switch Unit.
   • This can be confirmed by presence of wire connected to Controller Terminal 9.
   • Check / amend setting of Drayton DC1100 Remote Switch Unit in order to test accuracy of message displayed.
3. Check presence of bespoke Remote Override Control Unit
   • This can be confirmed by presence of wire connected to Controller Terminal 9.
   • A 33K Resistor should also be visible wired between Controller Terminal 9 and Terminal 7
4. Check / amend setting of Remote Override Control Unit in order to test accuracy of message displayed.
   • N.B.
   • The Drayton DC1100 Remote Switch Unit is common to both DC1100 and DC1400 installations.
5. If the DC1100/1400 is used as an Optimiser, check the room sensor is connected and reading.
   • Rectify the issue, a coldstart may be required to reconfigure the controller.