Appliance Faults; Boiler Indicates P1, P2, P3 At; Excessive Burner Noise, Rumbling Noises; Faults That Are Not Displayed - Worcester ZWBR 7-30 R 30 HE PLUS COMBI Service Booklet

Rectifying faults
Error Fd
4.5

Faults that are not displayed

4.5.1

Appliance faults

Boiler indicates P1, P2, P3 at start-up and then restarts with P1..
Check
1. Fuse T 1,6 A (312) defective.
2. The PCB control board is damaged.

Excessive burner noise, rumbling noises

Check
1. Does the gas supply type match the
specifications on the appliance iden-
tification plate?
B Test gas supply pressure - OK?
2.
Does pressure match figure speci-
fied in installation instructions?
3. Problem with flue?
B Check CO
level in combustion
2
air.
Is CO level above 0,2 % ?
2
36
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
B Power OFF the appliance.
yes:
B Disconnect the boiler electrical connection.
B Change the fuse.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
Start sequence not completed? ↓2.
↓2.
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.
Action
↓2.
yes:
B Convert appliance to correct gas type.
no:
Rumbling noises? ↓2.
↓3.
yes:
B Decommission appliance.
no:
Natural gas models:
B Notify gas company.
B Check flue and repair or replace if necessary.
yes:
Rumbling noises? ↓4.
↓4.
no:
7 181 465 347 (05.01)