Worcester ZSBR 7-30 RD 430i system, Service Booklet

Page: 26 / 56

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26
Rectifying faults
Error E9
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 seized? yes:
B
Unblock the pump.
If pump won’t start:
B
Power OFF the appliance.
B
Disconnect the boiler electrical connection.
B
Drain appliance.
B
Change the pump (see chapter
5.4
).
B
Fill system, bleed and re-pressurise (see Installa-
tion Instructions).
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
Reconnect 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 of cut-off device for
continuity.
Resistance very high?
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.
E9?
↓
5.