Pfannenberg DTT 6801 Series - LCD Error Messages

Operating Manual DTT 6801 Multicontroller (MC) 086100037 © Pfannenberg GmbH Page 40 / 49
GB
Error messages
Error
no.
Fault
Unit activity
Possible causes
Corrective measures
Er15
• LED:
• Compressor:
• Evaporator fan
(internal):
• Condenser fan
(external):
• Heater (external):
• Fault signal contact:
Blinking
OFF
OFF
OFF
OFF
Open
 Antifreeze (optional):
 Antifreeze sensor ≤ 1°C.
 Safety shut-off, because
there is a risk of icing of
the compressor.
 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).
Er19
• LED:
• Compressor:
• Evaporator fan
(internal):
• Condenser fan
(external):
• Heater (external):
• Fault signal contact:
Blinking
OFF
OFF
OFF
OFF
Open
 Sensor 5 (TS5) defect.
 Replace Sensor 5 or the
controller circuit board
according to the unit
type.