Multi-DENCO Fault Finding and Troubleshooting
FläktGroup DC-2013-0101-GB • Subject to modifications • R5-08/2020 123
11 Fault Finding and Troubleshooting
The Multi-DENCO range is designed to perform its primary function: cooling of the con-
trolled space, for as long as possible. As long as a consistent and suitable power sup-
ply is given to the unit, only 'Critical' alarms will stop the unit performing its primary
function. Other alarms or faults may deactivate additional features of the unit (e.g. turn
off the humidifier etc).
Fault finding shall only be carried out by qualified licensed staff or other individuals with
professional training and experience in the relevant accident prevention regulations, as
well as other generally recognized safety and occupational health codes.
Provided that a high quality, thorough and planned maintenance program is main-
tained, a Multi-DENCO unit should provide years of problem-free operation.
If you find that your room conditions are outside of design specifications, there are
some simple areas that you can check to gather valuable information:
Have conditions within the room changed?
– Has the equipment been recently moved?
– Has the airtightness of the room been compromised (e.g. door/window open)?
– Is there new equipment with higher/lower heat load?
– Is the air path temporarily blocked?
– Has additional cooling equipment been added to the room?
– Have the grille tiles been moved?
Observing the unit status:
– Has the unit got power from the main distribution board?
– Is the unit isolator in the ON position?
– Is the unit display working?
– What does the unit status description say?
– Is the unit controlled via BMS? What are the current commands?
– Is the unit a part of a network – is it currently in duty or standby mode?
– Can you hear the fans operating?
– Observe what previous alarms have been made (and dismissed)
– Have the set-points been modified?
– When was the last service?
These simple questions and observations give important information to an engineer to
be able to appreciate a situation before attending site. The more information you can
provide, the more likely the issue will be solved in a fast and timely manner.
NOTE!
A quality, routine, planned maintenance program should be implemented from com-
missioning. Failure to have a maintenance program in place during the warranty
period may invalidate the warranty.
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