What To Do If; General Errors; Fault Diagnosis; Pfannenberg Units With Multi-Controller - Pfannenberg DTT 6x01 Notice D'utilisation Et De Montage

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What to do if ...

... in spite of your care and attention a fault occurs?
Check the following points first.

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)

13.3 Pfannenberg units with Multi-Controller

When using a unit with Multi-Controller, the fault indication is given in the form of an error code on the control unit display. To classify the
error code, refer to the „Operating Instructions Pfannenberg Multi-Controller" provided with the documentation for the unit.
085 408 097
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.
Remedy
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
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