7 Troubleshooting
7.1
Error messages
7.1.1
Lockout (
or
type code)
In the event of a disruption, the control panel displays a message and a
corresponding code.
1. Make a note of the code displayed.
The code is important for the correct and rapid diagnosis of the type of
malfunction and for any technical assistance that may be needed.
2. Disconnect then reconnect the mains power cable.
The appliance will only resume operating when the malfunction has
been resolved.
3. If the code is displayed again, resolve the problem by following the
instructions in the table below.
4. If the causes of the lockout are still present after several automatic
start-up attempts, the appliance switches to Lockout mode (also called
"Malfunction").
For more information, see
List of
or
type codes
Tab.10
Code
Description
Checking / solution
Parameters error on the PCU PCB.
Contact the professional who handles mainte
nance of the appliance.
Maximum domestic hot water temperature excee
ded when domestic hot water production is not
guaranteed (by either the compressor or the back-
up).
Contact the professional who handles mainte
nance of the appliance.
Air pressure too high
Contact the professional who handles mainte
nance of the appliance.
The impressed current anode is in open circuit.
Contact the professional who handles mainte
nance of the appliance.
Remarks:
Production of domestic hot water is stopped but
may be restarted by pressing the reset key (for
72 hours).
Protection against corrosion is not assured.
The impressed current anode is in short circuit.
Contact the professional who handles mainte
nance of the appliance.
Remarks:
Production of domestic hot water is stopped but
may be restarted by pressing the reset key (for
72 hours).
Protection against corrosion is not assured.
LP pressure switch alarm.
Note: Domestic hot water production is assured by
the back-up, if the back-up is authorised.
Contact the professional who handles mainte
nance of the appliance.
The room temperature is less than 5°C.
Note: Domestic hot water production is assured by
the back-up, if the back-up is authorised.
The compressor will assure production of domestic
hot water once the room temperature exceeds
5°C.
The room temperature is above 35°C. The com
pressor is outside of its operating range.
Note: Domestic hot water production is assured by
the back-up, if the back-up is authorised.
The compressor will assure production of domestic
hot water once the room temperature is below
35°C.
7 Troubleshooting
EN-7602920 - v10 - 24042019
TWH 200 EV
29
