Worcester ZWBR 7-30 R 30 HE PLUS COMBI User Manual

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21
Rectifying faults
Error Ad
Ad flashing.
DHW cylinder NTC sensor not detected
Check Action
1. Is lead for DHW cylinder NTC sensor
correctly routed, i.e. not through
cable clamp?
yes: ↓2.
no: B Route connecting lead for DHW cylinder tem-
perature sensor as specified in installation
instructions.
Ad? ↓2.
2. B Activate menu option Show serv-
ice parameters.
B Select 0.3 Stor. tank
temp.sensor1.
Is a temperature between 0 and
5˚C displayed?
yes: If DHW cylinder sensor connector corroded, dam-
aged or dirty:
B Power OFF the appliance.
B Change NTC sensor.
B Turn ON the appliance.
B Press button .
Ad? ↓3.
no: ↓3.
3. B Unplug DHW cylinder NTC con-
nector from PCB control board.
B Check resistance from connec-
tions 3 to 4 on the cable side.
Does the value match the ones
described in table 7, page 50?
yes: B Make a note of the altered service function set-
tings (see table 1 on page 7) in order to keep
the altered values.
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.
B Restore service settings previously noted down.
no: ↓4.
4. B Unplug NTC sensor from cable in
DHW cylinder.
B Check resistance of NTC sensor.
Does the value match the ones
described in table 7, page 50?
yes: B Power OFF the appliance.
B Disconnect the boiler electrical connection.
B Change the NTC sensor connection cable.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
no: B Change NTC sensor.

Worcester ZWBR 7-30 R 30 HE PLUS COMBI Specifications

General

Brand	Worcester
Model	ZWBR 7-30 R 30 HE PLUS COMBI
Category	Boiler
Language	English