E
LTG Incorporated · PO Box 2889 · Spartanburg, S.C. 29304, USA
Chilled beams HDF-us-OM (01/17)
Phone 864 599-6340, Fax -6344 · [email protected] · www.LTG-INC.net
Former editions are invalid · Subject to technical modifications
page 28 of 30
Installation, operating and maintenance instructions
Active chilled beams HDF-600, ceiling installation
7.7
Troubleshooting and corrective action
7.7.1 Room temperature is not achieved
Trouble
Source
Action
No air movement at the unit's outlet
grille
No primary air supply
Activate primary air supply unit,
check fire protection flaps and,
if necessary, open. It is imperative to
investigate, find, and remedy the
cause for the flaps closing.
In case of shut-off flaps for entire
floors and duct runs, check and, if
necessary, open.
Check control.
No valve spindle movement when
actuator motor signal is being
changed.
Actuator is stuck
Set the temperature controller from
”max. hot” to ”max. cold” and vice
versa, may be the actuator can thus
be released. If unsuccessful, remove
actuator, clean resp. change it.
Unit is heating or cooling, but set
temperature is not achieved
Window is open
Close window
Water supply lines to the unit and
heat exchanger are at room
temperature
No cold or hot water supply
Ensure cold and hot water supply,
eliminate cold or hot water-related
problems, open shut-off valves to
supply
No control signal is applied to the
(valve) actuator, or it is not the one
according to setting (Actuator
performs wrong or no movement).
Refer to separate instructions for
control.
Deficient control
Have unit checked by a specialized
technician replacing or repairing
broken parts
Only poor air movement perceivable
on the active chilled beam's diffuser
Primary air nozzles polluted and,
thus, partly blocked
Clean nozzles by vacuum cleaner,
use a plastic nozzle or a small
brush.
Take care of
sharpe-edged
fins of heat ex
changer
Summary of Contents for HDF-600
Page 31: ......
