Supplied By www.heating spares.co Tel. 0161 620 6677
7 181 465 347 (05.01)
25
Rectifying faults
Error E2
E2
flashing.
The flow temp. NTC sensor is damaged.
Check
Action
1.
B
Activate menu option Show serv-
ice parameters.
B
Select 0.1 Flow temp. sensor.
Is a temperature between 0 and
5˚C displayed?
yes:
The heating outlet NTC sensor is in short circuit:
B
Power OFF the appliance.
B
Replace CH flow NTC sensor; observe fitting
instructions for NTC sensor when doing so.
B
Turn ON the appliance.
E2?
↓
2.
no:
↓
2.
2.
B
Unplug 20-pin connector from
PCB.
B
Check resistance from connec-
tions 8 to 9 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:
↓
3.
3.
B
Unplug NTC sensor from cable.
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 20-pin connector lead assembly.
B
Reconnect the boiler electrical connection.
B
Turn ON the appliance.
no:
B
Change NTC sensor.
