Union Instruments CWD2000 EX, Original Operating Instructions

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Table of contents
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12.1 Preparations for troubleshooting
The feed lines to linked system components can be closed for servicing purposes.
Once operation has been resumed, they need to be reopened.
NOTE
Events list:
The software keeps an event list with up to 1000 events in the order of occurrence
(tracked date). The events list provides information about faults.
You can export the event data to a special data medium (USB stick) after
consulting Service. Then you can send the exported data to the manufacturer for
fault analysis.
Events are: Start, stop, ignition, lack of cooling air, calibration
12.2 Changing/replacing fuses
Fuses may only be exchanged by an electrician or service professional. Choose
the type approved by UNION.
12.3 Instable measured value

The pressure regulator cannot hold constant pressure. The process pressure
is too low. A pressure increase pump must be installed.

Direct sunlight causes rapid changes in temperature. Avoid direct sunlight.

The pressure is imprecise and/or cannot be held.
Check if the input pressure is too high.
12.3.1 Drift of the measured value
The measured value drifts up in one direction:
The calibration does not reach the required point any more. The frequency
controller has reached its maximum value.
Heavy filter soiling which cannot be compensated by controller any more. Replace
the filter.
The measured value drifts down:
The heat exchanger is sooty (in case of propane, butane combustion with
insufficient air).
Clean the heat exchanger (warm water). Then dry with compressed air.