Ariston 200D Istruzioni per l'installazione, l'uso e la manutenzione - Pagina 23

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331
Missing communication between Main Board and HMI
332
333
Mainboard – WiFi board missing communication
334
Missing Communication between Inverter and main board
335
Safety board communication failure
336
Touch screen not working
337
Cascade master missing
MAINTENANCE (for authorized personnel)
WARNING!
Observe the general warnings and safety instructions listed in the previous paragraphs and strictly adhere to the indications therein
contained.
All maintenance operations and interventions should be performed by qualified personnel (i.e. with the necessary requirements as out-
lined in the applicable norms in force).
After routine or extraordinary maintenance, we recommend filling the appliance's tank with water and draining it completely to remove any
residual impurities.
Use only original spare parts from technical assistance centres that are authorised by the manufacturer.

DRAINING THE APPLIANCE

The appliance must be drained if left inactive in a room subject to
frost and/or in the event of prolonged inactivity.
1. Turn power off to ensure Nuos is not operated when empity.
2. Turn off cold supply to Nuos.
3. Shut off hot water feed from Nuos.
4. Connect hose to drain cock and place other end in sink, basin etc.
5. Open drain cock and open TPR valve to vent cylinder.
Reset the product by pushing the ON/OFF button twice. If the error persists,
OFF
OFF
replace the mainboard-display communication wiring.
If WiFi present:
- Check cables between motherboard and HMI.
- If the error persists, replace the HMI module.
ON
ON
If WiFi not present:
- Enter to the Installer Menu and set P31 OFF.
- If the error occurs again, replace the Main Board.
Check the communication cable and the related motherboard and TDC
ON
OFF
cables.
If the error persists, replace the TCD.
Reset the product by pressing the ON / OFF button twice.
OFF
OFF
If the error persists, replace the motherboard.
Reset the product by pressing the ON / OFF button twice.
ON
ON
If the error persists, replace the HMI.
Check that at least one of the products in the cascade is set as Master,
OFF
OFF
otherwise set one.
CYLINDER DRAIN
23 / EN