Evo HE C22/24 User Manual page 4

POINTS FOR THE BOILER USER
Note. In line with our current warranty policy we would ask that you check through the following guide to identify any
problems external to the boiler prior to requesting a service engineers visit. Should the problem be found to be other than
with the appliance we reserve the right to levy a charge for the visit, or for any pre-arranged visit where access is not
gained by the engineer.
TROUBLESHOOTING - TYPICAL NON PRODUCT FAULTS
Problem
1 Boiler is not working for
central heating or hot water.
2 Boiler is not working for central
heating or hot water but
attempts to fire by going
through 3 ignition attempts.
Display shows ' L : F L : F ' (flashing).
L : F L : F
L : F
3 Boiler is not working for
central heating or hot water
and the display shows ' L:A
(flashing).
4 Boiler is not working for
central heating or hot water
and the display shows ' H:A
(flashing).
5 Boiler will not fire for central
heating.
6 Boiler comes on for domestic
hot water without a tap being
opened - the display shows
'D'.
7 Boiler fires occasionally for
approx. 2 minutes - the
display shows 't'.
The nature of all combination boilers is to heat up water directly from the incoming mains water supply directly through the boiler to
supply domestic hot water at the stated flow rates, (as shown in the boiler installation instructions), to achieve a 35
rise. As the ambient temperature of the cold main varies during the summer and winter months it is likely in the colder winter months
that the flow rate will need to be reduced at the outlet taps to achieve the same temperatures achieved in the warmer summer
months. This is not a fault with the appliance but is relevant to the varying temperature of the incoming cold mains water
supply.
The code of practice for the installation,
commissioning & servicing of central heating systems
Wolseley Consumer Helpline 0870 849 8057
• Check there is power to the boiler – switch (A) in the ON position and ' 0 ' displayed on the
controls.
• If ' 0 ' not displayed then not a boiler fault – contact your installer/service company.
• Press reset button (D) for 2 seconds to repeat ignition sequence.
• Check gas supply (try another appliance – cooker/fire etc.) – If no gas supply then not a boiler
fault – contact gas supplier.
• Check condensate pipe is not blocked or frozen. If blocked clear blockage – if not possible to
check contact your installer.
• Press reset button (D) for 2 seconds, the boiler should then re-light. If fault recurs this indicates
an overheat condition. The boiler should be turned off and your installer contacted.
L:A '
L:A L:A L:A
• Check if ALL radiators have thermostatic radiator valves fitted. If they have contact your
installer.
• Check pressure gauge on boiler shows a minimum of 1 bar. If not re-pressurise via the filling
loop to 1 bar (if unsure contact your installer), turn off the tap on the filling loop and turn the on/
H:A ' off switch (A) off and then back on again to reset the boiler. If unable to do so or if the pressure
H:A H:A H:A
continues to drop after filling then contact your installer.
• Check if ALL radiators have thermostatic radiator valves fitted. If they have contact your
installer.
• Check external programmer is set to an 'ON' period.
• If already set to an 'ON' period then check the programmer by setting to continuous if boiler then
fires – Contact your installer to rectify the programmer.
• Check room thermostat by turning fully up, If '0' is not displayed on the user controls then
contact your installer.
• Check for dripping / dribbling taps or showers – turn fully off.
• Check for leaks from the domestic hot water pipework and if found contact your installer.
• This is a normal function of the boiler to periodically pre heat the plate heat exchanger to
optimise delivery time for domestic hot water to taps or showers.
Solution
C temperature
o