Supplied By www.heating spares.co Tel. 0161 620 6677
7 181 465 347 (05.01)
24
Rectifying faults
Error d3
d3
flashing.
Wrong signal from pin 8-9.
Check
Action
1.
B
Measure voltage between Termi-
nal 4 and Terminal 8.
Voltage
≅
24 V DC?
yes:
↓
2.
no:
↓
3.
2.
Link between terminals 8 and 9 con-
nected?
yes:
B
Power OFF the appliance.
B
Check link across 8-9 properly fitted, tighten
screws properly.
B
Turn ON the appliance.
d3?
↓
3.
no:
↓
3.
3.
Terminal block defective.
B
Power OFF the appliance.
B
Disconnect the boiler electrical connection.
B
Replace terminal strip.
B
Reconnect the boiler electrical connection.
B
Turn ON the appliance.
d3?
↓
4.
4.
The PCB control board is damaged.
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.
