7 181 465 347 (01.07)
24
Rectifying faults
d 3
flashing.
Wrong signal from pin 8-9.
Check
Action
1.
Jumper 8 - 9 fitted correctly?
yes:
↓
2.
no:
B
Power OFF the appliance.
B
Fit jumper 8 - 9 correctly, tighten screw.
B
Turn ON the appliance.
d3?
↓
2.
2.
B
Turn ON the appliance.
B
Measure voltage between Termi-
nal 4 and Terminal 8.
24 V DC?
yes:
↓
3.
no:
↓
5.
3.
Heat store NTC sensor connected to
terminals 7, 8 and 9?
yes:
B
Power OFF the appliance.
B
Plug heat store NTC sensor connector into PCB
control board (303, page 46, Pos. 303). If lead
has no connector: replace heat store NTC sen-
sor.
B
Turn ON the appliance.
d3?
↓
4.
no:
↓
4.
4.
Existing heat store thermostat con-
nected to Terminals 7, 8 and 9?
yes:
B
Power OFF the appliance.
B
Fix the additional bridge 8-9 in the right position
and close the screws.
B
Turn ON the appliance.
d3?
↓
5.
no:
↓
5.
5.
The PCB control board is damaged.
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.
Summary of Contents for ICC2 combi ZWBR 11-37 ICC2
Page 51: ...6 720 610 602 GB 03 02 Appendix 51 ...
Page 102: ...7 181 465 347 01 07 50 Appendix ...
Page 103: ...7 181 465 347 01 07 Appendix 51 ...
Page 104: ...Appendix ...
