Dantherm HCV 4 Manuel D'installation page 24

Troubleshooting guide,
Faults
22
continued
Identify the problem in the left-hand column and follow the instructions on the right:
Faults
The unit is not running, and
there are no lights on the
control panel.
Flashing red LED (120/min)
and beeping.
The unit has stopped and the
bypass damper is closed as
this fault constitutes a safety
risk (not HCV 4).
Cause
The power is not connected.
One of the temperature sen-
sors has detected a critically
high temperature of above
70°C.
The T2 supply air sensor has
detected a temperature of be-
low 5°C, which constitutes a
risk of frost damage to the af-
terheat coil (optional extra).
Lack of duct insulation. Very
low outside temperature be-
low
-10°C. The house is not heat-
ed. The system has not been
adjusted correctly.
The unit has been misaligned
so that there is gradient away
from the drain in the unit.
The drain is blocked in the
pipe or drip tray inside the
unit.
The styrene front cover and/or
the plastic panel on the drip
tray have been unscrewed from
the unit and have not been re-
placed securely enough.
Action
Check that the power
cable has been mount-
ed correctly.
Check that there is no
fire or other heat
sources that might
heat the pipe installa-
tions to above 70°C.
Examine the cause of
the low supply air
temperature and cor-
rect. Insulate the
ducts. Install pre-heat.
Carry out correct initial
adjustment. Activate
Installation Mode by
pressing Manual + Au-
to for 6 seconds. See
the section on initial
adjustment
Straighten the unit so
that it hangs/stands
horizontally/vertically.
Check that the drain is
not blocked and clean,
if required, with water
and detergent.
Check that the plastic
panel on the drip tray
and styrene front cover
have been installed
correctly so that they
are completely airtight
and watertight.
Continued overleaf