Troubleshooting; Maintenance; Checking The Safety Valve; Draining The Appliance - STIEBEL ELTRON PSH-H 30 Trend Bedienung Und Installation

INSTALLATION

Troubleshooting

13. Troubleshooting
Note
The high limit safety cut-out can respond at temperatures
below –15 °C. The appliance may be subjected to these
temperatures during storage or transport.
Fault Cause
The water does not heat The high limit safety
up and the ON/OFF indi- cut-out has responded
cator does not illuminate. because the controller is
faulty.
The high limit safety
cut-out has responded
because the temperature
has fallen below -15 °C.
The water does not heat The heating element is
up and the ON/OFF indi- faulty.
cator illuminates.
The water does not heat The temperature control-
up sufficiently and the ler is faulty.
ON/OFF indicator illumi-
nates.
The heat-up time is very The heating element is
long and the ON/OFF in- scaled up.
dicator illuminates.
The safety valve drips The valve seat is contam-
when heating is switched inated.
off.
Water pressure is too
high.
Reset key, high limit safety cut-out
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14. Maintenance

Remedy If you need to drain the appliance, observe chapter "Draining the
Remedy the cause of the
appliance".
fault. Replace the con-
troller.

14.1 Checking the safety valve

Press the reset button
f Test the safety valve regularly.
(see diagram).

14.2 Draining the appliance

Replace the heating el-
ement.
Replace the temperature
controller.
If is necessary to drain the cylinder for maintenance or to protect
the whole installation from frost, proceed as follows:
Descale the heating el-
f Close the shut-off valve in the cold water feed line.
ement.
f Open the DHW valves of all draw-off points until the appli-
Clean the valve seat.
ance is fully drained.
f Drain any residual water from the safety valve.
Install a pressure reduc-
ing valve.

14.3 Checking / replacing the protective anode

f Check the protective anode after the first year of use and re-
place if necessary.
f Next, decide the time intervals at which further checks
should be carried out.

14.4 Descaling

f Remove loose scale deposits from the water heater.
f If necessary, descale the inner cylinder with commercially
available descaling agents.
f Only descale the flange after disassembly and never treat the
cylinder surface and protective anode with descaling agents.
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
Before any work on the appliance, disconnect all poles
of the appliance from the power supply.
WARNING Burns
Hot water may escape during the draining process.
PSH Trend | 19