Maintenance; Trouble-Shooting; Fault Diagnosis - Glow-worm Ultracom 24cxi Installation And Servicing

MAINTENANCE

boiler it is recommended that it is checked and serviced at
regular intervals. The frequency of servicing will depend upon
the particular installation and usage, but in general once a year
should be enough.
It is the Law that any servicing is carried out by a competent
person approved at the time by the Health and Safety
Executive.
Before commencing with a service or replacement of parts
isolate the boiler from the electrical supply and turn off the
gas supply at the gas isolation valve.
When replacing a part on this appliance, use only spare
parts that you can be assured conform to the safety and
reconditioned or copy parts that have not been clearly
authorised by Glow-worm.
If any electrical connections have been disconnected
and after their connection, checks to the earth continuity,
polarity, short circuit and resistance to earth must be
repeated using a suitable multimeter, as described in chapter
installation".
After servicing, complete the relevant Service Interval
Record section of the Benchmark Checklist located in the
centre pages of this document.

15 Trouble-shooting

15.1

Fault diagnosis

The following checks should be performed before proceeding
Make sure that the electricity supply has not been interrupted
and that the appliance is connected correctly (See chapter
installation")
Check the appliance's gas supply (See chapter "Trouble-
Ensure that the isolating valves are open.
Ensure that the pressure indicator displays a value of 0.8 bar
(if the pressure falls below 0.4 bar, the air vent function will
run automatically for a period of 5 minutes until you see 0.5
Check that all external controls are connected correctly.
If the symbol and the message "rE SEt" are displayed
on the screen, display the fault code memory (see chapter "
Press the reset button to restart the appliance.
0020085231_02 - 05/10 - Glow-worm
15.1.1 Check the electrical installation
2
1
Key
1 Main board
2 Neutral
3 Live
4 Multimeter
Remove the front casing panel
Check the external electrical supply to the boiler is on and a
supply of 230V is present at the 'L' and 'N' terminals on the
main board.
Check the electrical installation and appliance, carry out tests
for earth continuity, polarity, short circuit and resistance to
earth, using a suitable multimeter.
Bare metal points such as screws or rivets will act as suitable
earth check points on the appliance.
15.1.2 Check the gas supply
2
1
Key
1 Gas service isolation valve
2 Test point
Check that there is a gas supply to the boiler and the gas
service isolation valve is turned on.
Check pressure at the gas service isolation valve.
MAINTENANCE
3
V
4
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