Glow-worm Ultrapower sxi - Manual (Page 36)

36
13 Fault Finding
Diagram 13.1
13.1 Preliminary fault finding
The following checks should be performed before proceeding
onto specific diagnostics:
• Check the external electrical supply to the boiler is on and
a supply of 230V is present at the ‘L’ and ‘N’ terminals at
the installer interface.
For access remove and open the electrical cartridge, see
diagrams 10.3. and 10.2.
Test at the ‘L’ and ‘N’ terminals on the installer interface,
refer to diagrams 10.2 and 13.1.
• Check the electrical installation and appliance, carry
out tests for earth continuity, polarity, short circuit and
resistance to earth, using a suitable multimeter.
An aid to test
Remove the tank module front panel to gain access to the
boiler module front panel securing screws, see diagram
12.1. Hinge down the control box and unclip the cover.
to gain access to the main PCB.
Carry out the tests at connector plug X17, see diagram
13.1. Check chassis earth at a bare metal point on the
boiler.
• Check that there is a gas supply to the boiler and the gas
service isolation valve is turned on, see diagram 11.1.
• Check pressure at the gas service isolation valve, refer to
section 11.6.
• Check that the heating system pressure indicates at least
1mb, if not, fill and vent the system as described in section
11.3.
• Check that all external controls are on.
• Check the functional flow diagram, 13.3.
13845
13.2 Fault Memory
The Fault memory stores details of the ten most recent faults.
To access this menu:
a) Press and hold ‘MODE’ for 5 seconds.
b) When the display shows a flashing ‘0’ press ‘MODE’
button.
c) Press a ‘+’ button to scroll back through the fault memory
(Position 1 is most recent), see fault memory display.
To exit this menu, press the ‘MODE’ button.
13452
Indicates
fault memory
position
Fault code
Fault memory display
13.3 Diagnostic Menu
The Diagnostic Menu provides the ability to view and change
certain parameters.
See Diagram 13.5 for available parameters.
To enter the diagnostic menu:
a) Press and hold the ‘MODE’ button for 5 seconds. The
display will change to flashing ‘0’.
b) Use the ‘+’ or ‘-’ buttons to scroll to 96 (This is the
installer level access password).
c) Press ‘MODE’ to confirm, see diagnostic display 1.
Use the ‘+’ or ‘-’ buttons to view the appropriate diagnostic
number, see diagram 13.4.
If necessary the values can be changed by:
a) Pressing the ‘MODE’ button.
b) The diagnostic value flashes, see diagnostic display 2.
13450
13451
c) Use the ‘+’ and ‘-’ buttons to cycle through available
values.
d) The change is saved by pressing ‘MODE’ once more.
( NOTE: Only certain parameters can be adjusted)
To exit the diagnostic menu press and hold the ‘MODE’
button for 5 seconds.
Diagnostic
value
Diagnostic
number
Diagnostic display 1
Diagnostic display 2