INSTALLATION
Shutting down the appliance
12
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13.1 Initial
startup
1.
2.
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f
Open the hot water valve of the faucet until water without
any bubbles comes out (at least 3 min). Once the stream is
free of air bubbles, close the hot water valve.
f
Insert the plug into the grounded receptacle.
f
Check to ensure none of the plumbing connections are
leaking.
Note
If the proper sequence (first water, then power) is not
followed, it will trigger the dry-run check.
Dry-run check
At initial startup and after every power interruption, the appliance
PCB performs a dry-run check:
Red LED
Lights for 20 seconds Appliance heats
Red LED
Off for 40 seconds
PCB self-test
During the dry-run check, the symbol “heating” flashes and the
backlight is switched on. The display shows “dr” followed by a
number, a counter, and “test” in sequence. The dry-run check will
take approximately 60 seconds.
Note
During the dry-run check ...
- the appliance must not be disconnected from the
utility power network.
- do not draw any water at the draw-off point.
After the dry-run check has completed successfully, the appli-
ance starts the automatic boiling point detection, which takes
approximately 5 minutes. Once everything is completed then the
green light will be constantly lit. This indicates a properly detected
boiling point and a working unit.
Note
If the dry-run check has been activated, the fault code
"E1" appears on the display. The appliance is locked out
of restarting for 5 minutes.
Proceed as follows:
f
Fill the appliance with cold water.
f
After a 5-minute lockout period, the appliance performs an-
other dry-run check.
f
If the fault is displayed again, reset the appliance (P6 = on).
13.1.1 Appliance handover
f
Explain the function of the appliance to the user. Familiarize
them with its operation.
f
Tell the user about potential hazards, especially the risk of
scalding.
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Hand these instructions to them, along with the instructions
for any accessories.
13.2 Restarting the appliance
See the section “Installation / Commissioning / Initial startup”.
14. Shutting down the appliance
f
Disconnect the appliance from the power supply by unplug-
ging it or switching off the circuit breaker at the load center.
f
Drain the appliance (see “Installation / Maintenance / Drain-
ing the Appliance”).
15. Fault messages
Flashing LEDs are used to signal faults. The corresponding fault
code appears on the display:
Fault code
Cause
Remedy
E001
Dry running
See "Initial startup / Dry-run
check".
E002
Temperature sensor
fault (break, short-cir-
cuit)
Replace appliance
E007
Waiting to cool to boil-
ing point detection
Open the hot water valve until
the water coming out is cold.
Close the valve and wait for suc-
cessful boiling point detection.
