Error Codes On The Display - Worcester CDi Combi N.G Service Booklet

7.4

ERROR CODES ON THE DISPLAY

A1
and fault indicator LED are flashing
Controlled characteristic pump has run dry
Check
1. System pressure below 1.2 bar
2. Pump seized or sticking?
3. Audible bearing damage on pump
4. Activate venting sequence
Tab. 13 A1 Error codes
8 716 115 748 (2009/09)
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
yes: B Power OFF the appliance
B Check appliance and system for water leaks and
repair as necessary.
B Fill system, bleed and re-pressurise
(see Installation Instructions).
B Turn ON appliance
A1? go to 2
no: go to 2
yes: Free/release pump
no: go to 3
yes: B Power OFF the appliance
B Disconnect the boiler electrical connection.
B Drain appliance.
B Change the pump (see Installation Instructions).
B Fill system, bleed and repressurise
(see Installation Instructions).
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
no: go to 4
yes. B Select in the first service level, service function 2.C
(Air Purge mode - see page 25).
B Select the value 1 and store.
B Exit the service function.
B The boiler vents for eight minutes.
B Vent radiators manually.
RECTIFYING FAULTS
29