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Code and description
045
(Blocking error)
Sensor error
Top sensor short
047
(Blocking error)
Sensor error
Top sensor open
0A5
(Lock out error)
Temperature error
Max. temperature excee-
ded (or thermal fuse acti-
vated)
4F1
(Blocking error)
Communication error
No communication be-
tween control board and
display board.
0313853_DRE PLUS_ENNLFR_V4.0, 15-05-2024
Note
Contact your service and maintenance engineer if the error persists.
Note
Each error has a code and a description. The code has 7 characters: XXX-XXXX. When
the water heater has an error, the two digits before the dash (XXX-XXXX) are important
to pinpoint the error.
Cause
Sensor is not (correctly) connected.
Damaged wiring and/or defective sensor. Replace the wiring and/or the sensor.
Short circuit in the sensor circuit.
The main safety thermostat (G1) is acti-
vated.
The thermal fuse broke the control cir-
cuit.
Wiring is damaged.
Measure
•
Make sure that the connector is con-
nected to J5 Pin 2 and 3.
•
Make sure that the wire is connected
to the sensor.
Replace the wiring and/or the sensor.
•
Make sure the water heater is com-
pletely filled.
•
Tap off water, so the temperature
drops in the water heater.
•
Make sure all connections are connec-
ted correctly, refer to the electrical
wiring diagram (see A.5).
•
Use the white button to manually re-
set the thermostat.
•
If necessary, replace the safety ther-
mostat (G1).
•
Cycle power to the water heater to re-
set the error.
•
Check what caused the excessive heat
rise of the element area.
•
Measure the resistance value over the
thermal fuse. The value needs to be
<5 Ohm.
•
If necessary, replace the thermal fuse
wiring.
•
Cycle power to the water heater to re-
set the error.
•
Make sure that the wiring, between
the control board and the display
board, is connected and not damaged.
•
If necessary, reconnect or replace the
wiring.
EN
69
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