Heat Store Ntc Sensor 1 Not Detected - Worcester ZSBR 7-28 ICS1 Service Booklet

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Heat store NTC sensor 1 not detected

Check
1. Is lead for heat store NTC sensor
correctly routed, i.e. not through
cable clamp?
B Activate menu option
2.
Show service parameters.
B Select
.3 Stor.tank temp.sensor1 .
Is a temperature between 0. and 5.
displayed?
3. Heat store -NTC 1:
B Unplug connector from PCB con-
trol board.
B Short circuit the connector using
wire jumper.
After max. 60 sec:
Display changes to temperature
between 100. and 95.
4. 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.?
1)
7 181 465 347 (01.07)
Action
↓2.
yes:
B Route connecting lead for heat store tempera-
no:
ture sensor as specified in installation instruc-
tions.
yes: Connector on end of NTC sensor lead:
B Flue gas connector corroded
dirty? Change relative parts.
B Press button
Ad? ↓3.
↓4.
no:
B Replace heat store NTC sensor 1.
yes:
B Power OFF the appliance.
no:
B Disconnect the boiler electrical connection.
B Change PCB control board.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
B Replace heat store NTC sensor 1.
yes:
B Power OFF the appliance.
no:
B Disconnect the boiler electrical connection.
B Change PCB control board.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
Rectifying faults
1)
, damaged or
.
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