Error Messages - Pfannenberg DTT 6801 Serie Betriebsanleitung

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
Er00 LED:
Compressor:
Evaporator fan (internal):
Condenser fan (external):
Fault signal contact::
Er01 LED:
Compressor:
Evaporator fan (internal):
Condenser fan (external):
Fault signal contact::
Er04 LED:
Compressor:
Evaporator fan (internal):
Condenser fan (external):
Fault signal contact::
Er05 LED:
Compressor:
Evaporator fan (internal):
Condenser fan (external):
Fault signal contact::
Er07 LED:
Compressor:
Evaporator fan (internal):
Condenser fan (external):
Fault signal contact::
Tab. 12: Possible error messages
Operating Manual | Roof-mounted Cooling Unit | Standard Controller (SC) – 400 / 460 V, 3~ | 086100040b
Possible causes
Door contact:
flashes
The door contact circuit is
OFF
interrupted.
OFF
OFF
closed
Pressostat tripped:
flashes
Too high pressure in the
OFF
refrigeration circuit.
ON
The cooling unit cannot
dissipate the heat from the
OFF
refrigeration circuit.
Open
flashes Phase sequence/phase
failure:
OFF
Failure of at least one
OFF phase or phase sequence is
wrong (only in three-phase
OFF
units with cam
compressors).
Open
flashes Sensor 1 (TS1) defective.
ON
ON
ON
Open
Sensor 1 Maximum:
flashes
Maximum value of the
ON
switch cabinet temperature
ON "Lit¯" (display) is reached or
exceeded.
ON
The cooling unit cannot cool
Open
the air in the switch cabinet
sufficiently.
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.
Check settings of the
cooling unit.
Clean the fins of the heat
exchanger
(internal/external).
Check the function of the
evaporator fan (internal).
Check the refrigeration
circuit for spilled refrigerant
or leakage.
Install a cooling unit with a
higher cooling capacity if
necessary.
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