Worcester GREENSTAR HE combi Series User Manual

7 181 465 347 (01.07)18
Rectifying faults
A5 flashing.
Heat store NTC sensor 2 defective
Check Action
1. B Activate menu option
Show service parameters.
B Select
.4 Stor.tank temp.sensor2 .
Is a temperature between 0. and 5.
displayed?
yes: B Is the connector for heat store NTC sensor 2 cor-
roded
1)
, damaged or dirty? Replace affected
components.
↓2.
1) For notes, refer to Appendix.
no: ↓3.
2. B Disconnect connector for heat
store NTC sensor 2.
B Short-circuit the 2-pin connector
on the end of the 20-pin connector
lead assembly.
After max. 60 sec:
Display changes to temperature
between 100. and 95.?
yes: B Power OFF the appliance.
B Change heat store NTC sensor 2.
B Plug the connection wire.
B Turn ON the appliance.
A7? ↓3.
no: B Change the 20-pin connector lead assembly.
↓3.
3. Temperature between 95. and 100. is
displayed.
B Unplug the connector.
After max. 60 sec.:
Does the displayed code change
to a value between 0. and 5.?
yes: B Power OFF the appliance.
B Change heat store NTC sensor 2.
B Plug the connection wire.
B Turn ON the appliance.
A7? ↓4.
no: ↓4.
4. B Unplug the 20-pin connector lead
assembly from the Heatronic.
After max. 60 sec.:
Does the displayed code change
to a value between 0. and 5.?
yes: B Change the 20-pin connector lead assembly.
no: 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.

Worcester GREENSTAR HE combi Series Specifications

General

Brand	Worcester
Model	GREENSTAR HE combi Series
Category	Boiler
Language	English