Trouble Shooting
The units were manufactured us-
ing the latest production methods
and tested repeatedly for perfect
function. If faults should still occur,
the unit must be checked against
the following list.
The unit does not start.
■ Check the operating switch set-
ting. The green pilot light must
illuminate
■ Check the supply connection
and local system fuse 230V/1~/
50Hz
■ Check the mains plug and mains
cable for damage
■ Check the level in the conden-
sate container and the container
for correct seating. (not for AMT
110-E)
■ Check the hygrostat setting (ac-
cessory).
The setting must be lower
than the relative humidity in
the room in which the unit is
installed
■ Check the adapter plug of the
hygrostat for damage and cor-
rect seating
The red (Fault) pilot light il-
luminates
■ The cooling circuit is overloaded
or overheated
■ Before restarting the unit, the
cause of the fault must first be
located.
To be noted is that the unit re
-
starts automatically after cooling
down
The unit operates, but no
condensate forms
■ Check the room temperature.
The operating range of the unit
is between 3°C and 32°C
■ Check the humidity, min. 40%
RH necessary
■ Check the dust filter for clog-
ging and clean or replace as
necessary
■ Check the evaporator and
condenser fins for clogging and
clean if necessary
■ Check the evaporator for pos-
sible icing/frost formation.
If this is the case, the automatic
defrost function and tempera
-
ture sensor must be checked
■ If the unit does not operate cor-
rectly despite the checks carried
out, an authorised specialist
company should be notified
Cleaning the units
For cleaning the interior of the unit
and to gain access to the electri-
cal components, it is necessary to
open the unit housing.
1. Remove the two fixing screws
[B].
2. Lift the housing part and hang
out the front tabs.
3. Clean the condenser fins either
by blowing out, suction or with
a soft brush.
4. Clean the evaporator fins, e.g.
with a luke-warm soap solution
or similar.
5. Do not use a direct water jet.
6. Rinse with clean water to re
-
move adhering soap residues.
7. Clean the inner surfaces of the
unit and fan impeller.
8. Clean the condensate trap and
connection.
9. After cleaning, the unit must be
dried.
Pay special attention to the
electrical components!
10. Refit all removed parts correctly
in reverse order.
11. Carry out a functional check
and safety test on the unit.
NOTE
Particular care must be taken
when cleaning the exchanger
as the fine aluminium fins bend
very easily.
CAUTION
Only specially authorised
firms may carry out work on
the refrigeration system and
electrical equipment.
NOTE
Adjustment and maintenance
tasks may be performed only
by authorised expert
personnel!
CAUTION
After completing all work on
the units, an electrical safety
test must be carried out in
accordance with VDE 0701.
B
B
