CSMC 3805 - Heating is not operating.

Issue

The heating plant is remaining off when the controller is in an occupation period.

Product Line

Field Devices

Environment

Controllers

CSMC 3805

Cause

The controller has shutdown because of high internal or high external temperatures.

Resolution

The controller can generally be forced to night mode if one of the following settings is reached.

1 - Optimum Off - Minimum Inside Temperature - code B10

2 - Inside High Limit Temperature - code B12

3 - Outside High Limit Temperature - code B14

In the case of item 1, if the controller has decided that it can optimise off, then this setting is the lowest temperature before the plant will be switched back on again.

Items 2 and 3 dictate the temperature above which, the plant is switched off.

To view the controller data sheets, please select here. General data sheet,  Configuration data sheet A.

or Configuration data sheet B.

If the plant has switched off then changing the appropriate setting will allow the plant to switch back on again.