Worcester ZWB 7-25 HE combi Specifications download pdf (Page 30)

7 181 465 346 GB (03.02)

Failure identification procedure

E9 and flashing.

Safety temperature limiter has tripped.

Check Action

1. Is the heating pressure between 1

and 2 bar?

yes: ↓2.

no: B Top up system.

B Vent appliance.

B Press , restart the appliance.

E9? ↓2.

2. Is the pump blocked? yes: B Unblock the pump.

If pump won’t start:

B Power OFF the appliance.

B Disconnect the boiler electrical connection.

B Change the pump.

B Reconnect the boiler electrical connection.

B Turn ON the appliance.

B Press , restart the appliance.

E9? ↓3.

no: ↓3.

3. Lead disconnected from safety tem-

perature limiters?

yes: B Power OFF the appliance.

B Connect lead.

B Turn ON the appliance.

B Press , restart the appliance.

E9? ↓4.

no: ↓4.

4. B Power OFF the appliance.

B Unplug the connector from the

cut-off device.

B Measure the NTC electrical resist-

ance.

R = ∞?

yes: B Change the over heating cut-off device.

B Connect flue gas safety temperature limiter lead.

B Turn ON the appliance.

B Press , restart the appliance.

E9? ↓5.

no: B Connect flue gas safety temperature limiter lead.

B Turn ON the appliance.

↓5.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 55 56

Comments to this Manuals

No comments

Worcester ZWB 7-25 HE combi Specifications Page 30

Comments to this Manuals

Related products and manuals for Water heaters & boilers Worcester ZWB 7-25 HE combi