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SHZ LCD |
35
EN
GL
ISH
INSTALLATION
Troubleshooting
14. 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.
Service code display
f
Call up the service code display in the menu (see chapter
"Settings / Menu settings").
f
The plugs are described in chapter "Specification / Wiring
diagrams and connections".
Fault
Code
Cause
Remedy
No display.
There is no power.
Connect the power supply.
There is no connection to the electronic assem-
bly for operation.
Check whether plug X2 is properly inserted.
The electronic assembly for operation is faulty.
Check the electronic assembly for operation and
replace if required.
Scale build-up symbol
"Ca" appears.
The flanged immersion heater is scaled up.
Descale the flanged immersion heater. The
symbol is automatically reset.
Service/fault symbol
appears.
2
Permanent set temperature
display.
The temperature sensor is faulty.
Check whether plug X10 is properly inserted.
4
Check the temperature sensor.
16
The impressed current anode is faulty.
Check whether plug X7 is properly inserted.
Check the impressed current anode and wiring.
128
The set values selected last
are active; possibly permanent
display
128.
Communication between the electronic assem-
blies for control unit and operation is faulty.
Check whether plugs X2 are inserted properly
in both assemblies.
Check the assemblies and the connecting cable.
Service/fault symbol
flashes and the water
does not heat up.
6
Permanent set temperature
display.
The temperature sensor is faulty.
Check whether plug X10 is properly inserted.
Check the temperature sensor.
8
The heat-up symbol does not
appear.
The high limit safety cut-out has responded be-
cause the controller is faulty.
Remedy the cause of the fault. Replace the high
limit safety cut-out.
The high limit safety cut-out has responded
because the temperature has dropped below
-15 °C.
Press the reset button
(see diagram).
The rapid heating does not switch on.
Check the key.
The flanged immersion heater is faulty.
Replace the flanged immersion heater.
32
Boil-dry protection.
There is no water in the water heater.
Fill the water heater.
There is no anode current.
Check whether plug X7 is properly inserted.
Check the impressed current anode and wiring.
64
The relay is faulty.
Replace the electronic assembly for the control
unit.
2
6
_0
2_0
7
_0
2
0
2_
2
1
1 Reset key, high limit safety cut-out
2 High limit safety cut-out