Worcester ZBR 8-35 ICS1, Сервисная книжка

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7 181 465 347 (01.07)
26
Rectifying faults
E 9
and flashing.
Safety temperature limiter has tripped.
Check Action
1. Is the heating pressure between 1
and 2 bar? yes: B Top up system.
B
Vent appliance.
B
Press , does appliance restart???
E9?
↓
2.
no:
↓
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 , does appliance restart???
E9?
↓
3.
no:
↓
3.
3. Is lead disconnected from one/both
safety temperature limiters? yes:
B
Power OFF the appliance.
B
Connect lead.
B
Turn ON the appliance.
B Press , does appliance restart???
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 , does appliance restart???
E9?
↓
5.
no:
B
Connect flue gas safety temperature limiter lead.
B Turn ON the appliance.
E9?
↓
5.