Dantherm HCV4 User Manual page 21

Fault finding guide,
Problems, Locate the problem in the left column, and follow instructions on the right:
continued, continued
The unit always runs at the
same speed.
The display goes out after a
brief period of time, after
which only the green LED is
lit.
19
continued
Problem
The unit is set to manual
mode at a specific speed.
The display goes into hi-
bernation mode after 2
minutes in order to save
energy.
Cause
Set the unit to automatic
demand control, after
which the unit will adjust
the volume of air as
needed.
The unit is working
properly.
Tip