Pfannenberg DTI 6x01 - Manual (Page 17)

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085 408 121a 17/60
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.
13.1 General errors
- No message via the service indicator
Fault Possible cause(s) Remedy
Unit fails to cool,
fan in an internal airflow circuit
is running.
Temperature setting too high. Check temperature setting.
Unit fails to cool sufficiently. Threshold values for usage exceeded.
Lack of coolant.
Heat exchanger contaminated.
Fan in internal airflow circuit faulty. Fan in external
airflow circuit faulty.
Air not circulating properly inside the switch cabinet.
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 exhaust into/from cooling unit into switch
cabinet must be unimpeded.
Unit only cools irregularly Coding switch incorrectly set or defective. Set higher temperature at thermostat.
Condensate accumulates in
switch cabinet.
Blow-out temperature too low.
Switch cabinet not sufficiently sealed.
Close switch cabinet door.
Remedy leakage at switch cabinet.
Condensate fails to drain. Condensate drainage clogged. Clean condensate drainage. Condensate drainage hose
must be inclined downward without showing a bend.
Condensate runs out of the unit The condensate evaporator is defective or too much
condensate accumulates.
Switch cabinet not sufficiently sealed.
Replace the fuses for the condensate evaporator.
Remedy leakage at switch cabinet.
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)
(5s, 1s, 1s, 1s) with periodic repetition
Status indicator, flashing sequence 2:
(Unit fault)
(1s, 1s) with periodic repetition
Status indicator, flashing sequence 3:
(Test/start-up mode)
(1s, 1s, 1s, 1s) with periodic repetition
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 temperature display. To classify the
error code, refer to the „Operating Instructions Temperature display unit“ provided with the documentation for the unit.
Hint:
The legibility of the display may be limited due to electromagnetic disturbances.