Service Manual

Page 48
6. After Sales Service
In order to ensure a correct start-up of the appliance and a correct function after any
intervention on the appliance, the service manual must be read and main recommendations followed
to avoid wrong diagnostic / components replacement and premature failures.
To ensure correct start-up of the appliance and correct function after any maintenance
procedures, the service manual must be read and fully followed to avoid incorrect diagnostics and prevent
incorrect component replacement or premature failure of components or the appliance.
6.1 PCB Replacement:
When replacing the control unit, configurations need to be checked and set accordingly. Not
following precautions will result in potential wrong operation of the unit with abnormal combustion,
noise and temperature instability.
Attention:
Control units are supplied as spare part with the following default values:
• NG = Natural Gas (setting visible in P7)
• Indoor Model (visible in PE – nO)
Recommended Procedures:
1
st
– Combustion Parameters Registration:
- Take note of P1 / P2 combustion adjustment values (settings memorized in factory
regulation);
2
nd
– PCB replacement
- Switch off the electrical supply.
- Unscrew fixation screw of PCB.
- Disconnect the connectors in PCB.
- Reassemble all the connections.
Mode
Parameter
Setting
P1 (Max Power)
A1
L1
P2 (Min Power)
A2
L2
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