Inadequate Hot Water Outlet Temperature (Combi Boiler); Table - Worcester ZWBR 7-30 R 30 HE PLUS COMBI Service Booklet

Rectifying faults
Error Fd

Inadequate hot water outlet temperature (combi boiler)

Check
1. Pump set to mode 3?
B Unplug connector from Heatronic;
2.
is voltage between terminal 1 and
terminal 3 230 V AC?
42
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Action
↓2.
yes:
B Set pump switch to setting 3.
no:
Inadequate hot water outlet temperature ? ↓2.
B Power OFF the appliance.
yes:
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.
B Make a note of the altered service settings (see
no:
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.
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