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42
Rectifying faults
Error Fd
Inadequate hot water outlet temperature (combi boiler)
Check Action
1. Pump set to mode 3? yes: ↓2.
no: B Set pump switch to setting 3.
Inadequate hot water outlet temperature ? ↓2.
2. B Unplug connector from Heatronic;
is voltage between terminal 1 and
terminal 3 230 V AC?
yes: B Power OFF the appliance.
B Disconnect the boiler electrical connection.
B Change the 20-pin connector lead assembly.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
no: B Make a note of the altered service settings (see
table 1 on page 7).
B Power OFF the appliance.
B Disconnect the boiler electrical connection.
B Change PCB control board.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
B Restore service settings previously noted down.