Maintenace; Stopping; What To Do If; General Errors - Pfannenberg DTD Serie Instrucciones De Instalación

• You can rinse the filter mat using water heated to 40 °C and commer-
cially available mild detergent. It is possible to remove any dry dirt by
knocking the mat slightly, vacuum cleaning it or blowing it out.
CAUTION: Damage to the filter mat.
Do not wring the filter mat. Avoid too solid a water jet.
• If the filter mat is oily or greasy, replace.
11.2 Maintenance
The cooling circuit, as a maintenance-free, hermetically sealed
closed system, is filled at the factory with the necessary coolant,
checked for leakages and is subjected to a functional check run.
The cooling unit is largely maintenance-free. The components
around the external air circuit require maintenance and cleaning
depending upon the ambient conditions (see Section 11.1).
After each service, the full performance capacity of the
condensate run-off should be checked.

13.1 General errors

- No message via the service indicator
Fault
Unit fails to cool, fan in an
internal airflow circuit is running
Unit fails to cool cufficiently.
Unit only cools irregularly
Condensate accumulates in
switch cabinet
Condensate fails to drain

13.2 Fault diagnosis

- Message via the service indicator
If a fault occurs in the cooling unit, the status indicator goes over to flashing mode which in conjunction with the unit characteristics is to
make initial fault diagnosis easier.
Flashing sequences in the fault mode can be:
Status indicator, flashing sequence 1:
(User error)
Status indicator, flashing sequence 2:
(Unit fault)
Status indicator, flashing sequence 3:
(Test/start-up mode)
085 408 067
Possible cause(s)
Temperature setting too high
Thresholdvalues for usage exceeded.
Lack of coolant
Heat exchanger contaminated.
Fan in internal airflow circuit faulty. Fan in
external airflow circuit faulty.
Air not circulationg properly inside the
switch cabinet
Coding switch incorrectly set or defective.
Blow-out temperature too low
Switch cabinet not sufficiently sealedt.
Condensate drainage clogged.
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Stopping

If the cooling unit is not in use for a longer period, disconnect it.
Ensure that unauthorised persons cannot start the cooling unit.
IWhen the cooling unit is no longer needed, it must be disposed
of by authorized specialist personnel in accordance with all
applicable environmental protection regulations. (see also
Section 4, General Information)
It is essential that the refrigerant in the cooling system is properly
removed by suction. Refrigerant emissions must be prevented.
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What to do if ...

... in spite of your care and attention a fault occurs?
Check the following points first. If the fault is not then cleared,
call an authorized specialist.
Check temperature setting.
Check ambient temperature and internal
load.
Call authorized specialist, check unit for
leaks
Clean heat exchanger.
Call authorized specialist, replace fan.
Check assemblies and air circulation inside
switch cabinet. Air intake and eexhaust into/
from cooling unit into switch cabinet must
be inimpeded.
Check coding switch and cable
connections.
Set higher temperature at thermostat..
Close switch cabinet door.
Remedy leakage at switch cabinet.
Clean condensate drainage. Condensate
drainage hose must be inclined downward
without showing a bend.
(5s, 1s, 1s, 1s) with periodic repetition
(1s, 1s) with periodic repetition
(1s, 1s, 1s, 1s) with periodic repetition
Remedy
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