Operating instructions
1.0 Operating the Boiler
4
1.2 Fault Indication
1. If a fault occurs on the boiler an error code may be
shown on the facia display.
2. The codes are either two or three digit, preceded by the
letter 'E'. For example, code E133 will be displayed by 'E1'
alternating with '33'. E50 is shown as 'E' then '50'.
3. E20, E28, E50, E125 & E160 indicate faulty components.
You should make a note of the displayed error code and
contact your installer or service engineer.
4. If E110 or E130 is displayed overheat of the primary
water or flue system has occurred. Turn the selector switch
to the reset position and hold for at least 5 seconds. If the
boiler does not relight, or the code is displayed regularly
contact your installer or service engineer.
5. E119 is displayed when the primary water pressure is less
than 0.5 bar. After repressurising the system the boiler
should operate. Your installer will be able to advise you
about the method of repressurising. See page 6 for further
details.
6. E133 indicates that the gas supply has been interrupted,
ignition has failed or the flame has not been detected.
Ensure that the gas supply has not been turned off, and turn
the selector switch to the reset position and hold for at
least 5 seconds. If the boiler does not relight, or the code is
displayed regularly contact your installer or service engineer.
1.3 Resetting (Fig. 8)
1. To reset the boiler turn the selector switch fully
anticlockwise against the spring pressure for approximately
5 seconds and release.
1.4 Pump Protection
1. With the selector switch in either Position (i) or Position
(ii) (Figs. 7 & 9) the pump will automatically operate for 1
minute in every 24 hours to prevent sticking.
1.5 3-Way Valve - Anti-sticking
1. If there is no demand for heat in a 24 hour period, the 3-
way valve will be operated once to help prevent sticking.
Central Heating NTC Fault
Flue NTC Fault
Hot Water NTC Fault
Safety Thermostat Operated
Water Pressure Switch Not Operated
Pump Fault
Flue NTC Operated
Interruption Of Gas Supply or Flame Failure
Fan or Fan Wiring Fault
E20
E28
E50
E110
E119
E125
E130
E133
E160
Table of Error Codes
2
1
0
4
3
bar
R
1
2
3
4
5
P
M
7
8
9
10
11
12
1
2
3
4
5
AM
7
8
9
10
11
12
GRASSLIN
0
Display
Then
Fig. 6
Fig. 7
Fig. 9
Reset Position
Fig. 8
Position (ii)
(Hot Water)
Position (i)
(Central Heating or Hot Water)