Error Messages - Pfannenberg DTT 6401 Serie Instrucciones De Servicio

ENG
7.1.1

Error messages

The error numbers are not displayed in units with Standard Controllers. Using the ECoolPLANT software, it is possible to read
out the error numbers on the computer.
NOTE
Flashing of the red LED light on the controller card is not a fault indication or error message.
The red LED light indicates that the cooling unit is carrying voltage.
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::
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. 12: Possible error messages
Operating Manual | Roof-mounted Cooling Unit | Multi Controller (MC) – 115 V | 086100029c
Possible causes
Door contact:
flashes
The door contact circuit is
OFF
interrupted.
OFF
OFF
OFF
closed
flashes Pressostat tripped:
Too high pressure in the
OFF
refrigeration circuit.
ON
The cooling unit cannot
dissipate the heat from the
OFF
refrigeration circuit.
OFF
Open
flashes Phase sequence/phase
failure:
OFF
Failure of at least one phase
OFF or phase sequence is wrong
(only in three-phase units with
OFF
cam compressors).
OFF
Open
flashes Sensor 1 (TS1) defective.
ON
ON
ON
OFF
Open
Remedial measures
Close the door.
Connect the door contact
switch.
Bridge the door contact.
Check wiring.
Let the unit cool down.
Clean the fins of the heat
exchanger (internal/external).
Check the function of the
condenser fan (external).
Check field of rotation - (right-
hand field of rotation is
mandatory).
All phases must carry rated
voltage.
According to the unit type,
replace sensor 1
(permanently soldered on the
controller card) or the
complete controller card.
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