iNSTallaTiON
appliance shutdown
EN
GL
ISH
www.stiebel-eltron.com
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11
11.2 Recommissioning
Vent the appliance and the cold water inlet line (see chapter "Set-
tings").
See chapter "Initial start-up".
12. Appliance shutdown
f
Isolate all poles of the appliance from the power supply.
f
Drain the appliance (see chapter "Maintenance").
13. Troubleshooting
WARNING Electrocution
To test the appliance, it must be supplied with power.
Indicator options for diagnostic traffic light (LED)
Red
Illuminates in the event of a fault
Yellow
Illuminates during heating operation
Green
Flashing: Appliance connected to power supply
L
L
3
L3’
4
L2’
1
L1’
2
M
V
N
T
C
T-
so
ll
1 8
2 1
2 4
k W
D
00000
41
79
3
1
1 Diagnostic traffic light
fault / lED diagnostic traffic light
Cause
remedy
The flow rate is too low.
The strainer in the appliance is dirty.
Clean the strainer.
The set temperature is not achieved.
One phase down.
Check the fuse/MCB in your fuse box/distribution
board.
The heating system does not switch on.
Air has been detected in the water and heating out-
put is briefly switched off.
The appliance restarts after one minute.
No hot water and no traffic light display.
The MCB/fuse has responded/blown.
Check the fuse/MCB in your fuse box/distribution
board.
Safety pressure limiter AP 3 has tripped.
Remove the cause of the fault (e.g. faulty pressure
flush).
Protect the heating system against overheating by
opening a draw-off valve downstream of the appli-
ance for one minute. This depressurises and cools
down the heating system.
Activate the safety pressure limiter at flow pressure
by pressing the reset button (see chapter "Commis-
sioning").
The PCB is faulty.
Check the PCB and replace if required.
Traffic light display: Green flashing or constantly on
The PCB is faulty.
Check the PCB and replace if required.
No hot water at a flow rate > 3 l/min.
The flow meter (DFE) is not plugged in.
Plug the flow meter plug back in.
The flow meter (DFE) is faulty.
Check the flow meter and replace if required.
Traffic light display: yellow constantly on; green
flashing
The high limit safety cut-out has responded or suf-
fered a lead break.
Check the high limit safety cut-out and replace it if
required.
No hot water at a flow rate > 3 l/min.
The heating system is faulty.
Check the heating system resistor and replace if re-
quired.
The PCB is faulty.
Check the PCB and replace if required.
Traffic light display: red constantly on; green flashing The cold water sensor is faulty.
Check the PCB and replace if required.
No hot water
Required temperature > 45 °C is not achieved.
The cold water inlet temperature is above 45 °C.
Reduce the cold water inlet temperature to the ap-
pliance.
14. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all poles
from the power supply.
Draining the appliance
The appliance can be drained for maintenance work.
WARNING Burns
Hot water may escape when draining the appliance.
f
Close the shut-off valve in the twin connector or the cold
water inlet line.
f
Open all draw-off valves.
f
Undo the water connections on the appliance.