Pfannenberg DTT 6401 Serie Instrucciones De Servicio página 91

GB
Error messages
Error
Fault
no.
•
Er15 LED:
•
Compressor:
•
Evaporator fan
(internal):
•
Condenser fan
(external):
•
Heater (external):
•
Fault signal contact:
• LED:
Er19
• Compressor:
• Evaporator fan
(internal):
• Condenser fan
(external):
• Heater (external):
• Fault signal contact:
Operating Manual DTT 6401 Multicontroller (MC) 086100035a © Pfannenberg GmbH
Unit activity Possible causes
 Antifreeze (optional):
Blinking
 Antifreeze sensor ≤ 1°C.
OFF
 Safety shut-off, because
OFF
there is a risk of icing of
OFF
the compressor.
OFF
Open
 Sensor 5 (TS5) defect.
Blinking
OFF
OFF
OFF
OFF
Open
Corrective measures
 Restart after
accumulating
condensate water has
evaporated.
 A restart is only possible
with disconnection and
re-connection of the
mains voltage.

For safety reasons, there
is no other means of
resetting.
 Clean the heat
exchanger fins
(internal/external).
Inspect the switch
cabinet for leaks.
 Select higher switch
cabinet-
Select temperature
setpoint.
 Check function of the
evaporator fan
(internal).
 Replace Sensor 5 or the
controller circuit board
according to the unit
type.
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