Stopping; What To Do If; General Errors; Fault Diagnosis - Pfannenberg DTS 9 41 serie Betriebs- Und Montageanleitung

After each service, the full performance capacity of the condensate
run-off should be checked.

12 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, Gene-
ral Information)

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 075b
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.
It is essential that the refrigerant in the cooling system is properly
removed by suction. Refrigerant emissions must be prevented.

13 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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