Pfannenberg DTT 6401 Serie Instrucciones De Servicio página 148

ENG
Error no. Fault/unit behavior
LED:

Compressor:
Evaporator fan (internal):
Condenser fan (external):
Heating (external):
Fault signal contact::
LED:

Compressor:
Evaporator fan (internal):
Condenser fan (external):
Heating (external):
Fault signal contact::
Tab. 13: Possible error messages (continued)
Operating Manual | Roof-mounted Cooling Unit | Multi Controller (MC) – 400 V, 3~ | 086100035c
Possible causes
flashes Antifreeze (option):
Antifreeze-Sensor ≤ 1°C.
OFF
Safety cut-out because the
OFF
evaporator is threatening to
ice up.
OFF
OFF
Open
flashes Sensor 5 (TS5) defective.
OFF
OFF
OFF
OFF
Open
Remedial measures
Restart operation after
condensate has evaporated.
A restart is only possible by
disconnecting and
reconnecting the mains
voltage.
No other reset is provided for
safety reasons.
Clean the fins of the heat
exchanger (internal/external).
Check switch cabinet for
leakages.
Select a higher switch cabinet
temperature setpoint.
Check the evaporator fan
(internal) function.
Replace sensor 5 or the
controller card according to
the unit type.
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