Dantherm HCV 4 Manuel D'installation page 25

Troubleshooting guide,
Problems Identify the problem in the left-hand column and follow the instructions on the right:
Abnormal noise levelsfrom
the unit.
The unit is not cooling suf-
ficiently.
continued
Problems
Fan Step 4 is running (only
intended for shorter peri-
ods of use).
The filter is blocked.
The installation has not been
carried out correctly. The air
duct may be partially
blocked.
The unit has not been ad-
justed correctly.
The unit is an HCV 4, which
has no built-in bypass
module.
The outside air may be heat-
ed up before entering the
house.
The temperatures are ex-
ceeding the established lim-
its that must be met to
achieve cooling by means of
bypass. See also the Set
Points and Control Strate-
gies section
The bypass damper has be-
come jammed or the damper
motor is defective.
Cause
Turn the unit down to Fan
Steps 1, 2 or 3 or activate
Automatic On-Demand
Mode.
Check and change filter, if
required.
Check that the ducts have
been mounted correctlyand
that they are not blocked.
Adjust airflow, see the sec-
tion on how to adjust the
unit.
The unit is functioning cor-
rectly.
If required, move the inlet
grille to the north side of
the house.
Press the manual bypass to
achieve cooling for the next
6 hours.
Check the bypass module
and replace the bypass mo-
tor if required.
Action
Continued overleaf
23