Faults Indicated On Display; Controlled-Characteristic Pump Has Run Dry - Worcester ZSBR 7-28 ICS1 Service Booklet

4.4

Faults indicated on display

A 1
flashing.

Controlled-characteristic pump has run dry

Check
1. System pressure below 1.2 bar?
2. Activate venting sequence.
3. Audible bearing damage on pump?
1) See installation instructions
7 181 465 347 (01.07)
Action
B Power OFF the appliance.
yes:
B Check appliance and system for water leaks and
repair as necessary.
B Top up system.
B Turn ON the appliance.
A1? ↓2.
↓2.
no:
B Activate menu option Show service parameters.
B Select 7.3 Aeration mode select setting On,
autom. deactivat. and confirm.
B Vent appliance
B Vent radiators.
↓3.
yes: B Power OFF the appliance.
B Drain appliance.
B Replace pump.
B Top up system.
B Turn ON the appliance.
Rectifying faults
1)
.
17