28
e.
Check that gas is flowing from the pilot during the ignition sequence. Clean or Replace as required.
f.
For the Remote Control Systems only, listen to the control to hear if the pilot gas solenoid is opening. Change the receiver, and the hand-
set at the same time and/or gas control. Refer to Section 22 for Cable connections diagram.
Also see Important Note at the beginning of this Section 20, concerning possibly returning parts as the cheaper option.
20.3 - PILOT GOES OUT AFTER FIRST LIGHTING
a.
Check there is no debris blocking the flame to the thermocouple.
b.
Check there is nothing covering the terminal guard/flue on the outside.
c.
Check the thermocouple is in the correct position because although the fixing nut may seem tight and secure, the Thermocouple
may have slipped down. Slacken the fixing nut, reposition then retighten. With the Thermatronic System check all connections in
the Thermocouple circuit., from the valve, interrupter and wiring connections to the Receiver.
d.
If the Pilot Flame seems small the Injector may be slightly blocked, replace.
e.
For the Remote Control Systems only, listen to the control to hear if the pilot gas solenoid is opening.
Change the receiver and at the same time and/or the gas control. Refer to Diagram for Cable connections in Section 22.
f.
Also see Section 21.5.
g.
Specific to new installations and by far the highest cause of this type of fault. Typically the pilot and main burner lights
with the door open but goes out when the door is closed.
Possibly part or all of the cutting aid has been left in the flue after cutting.
20.4 - PILOT LIGHTS BUT MAIN BURNER DOES NOT LIGHT
a.
With All Control Systems listen to hear if gas is flowing into the main burner.
b.
Check there is no dust or debris blocking the flame from the pilot to the main burner.
c.
With the 2 Remote Control Systems check that both Control Knobs are in the on position, fully turned anti clockwise.
Also check
‘e’
before determining the action required.
d.
With the 2 Remote Control Systems check if the main control knob on the control is turning to the high setting and
listen to hear if the valve is opening. If not change the Handset & Switch (which ever applies) and at the same time the gas control.
For removal of the systems refer to the Diagram for Cable connections in Section 22.
Also check
‘g’
(below) before considering replacing any parts. You should also consider the
Important
note in 21.1.
e.
With the 2 Button High Level Control it is possible for the Main Burner to light when first lit after lighting the Pilot but then the Push
Buttons do not operate the control. Operate the bottom button and listen to see if the Control Knob turns. If it does not then
change the batteries, if still a problem change the Switch Assembly as detailed in
‘f’
.
f.
For removal/replacement of the 2 & 3 Button Switches first remove the 2 screws retaining the Switch Shield, remove the 2
screws retaining the Switch Assembly. Disconnect the push on wire connections at the control. Remove the switch and wires and
replace with a new component in reverse order.
g.
All Control Systems have a Pressure Test Point to allow the Burner Pressure to be checked to confirm if gas is flowing from the
control. On the Manual Control it is visible at the front left of the control. On the 2 Remote Control Controls it is the left pressure test point
facing the front. Ensure the pressure test point screw is fully closed after checking.
h.
Check if the main injector is blocked. Clean or Replace.
i.
Also see Section 21.3.g.
20.5 - PILOT FLAME SHORTENS, OR GOES OUT WHEN MAIN BURNER IS SELECTED
a.
Monitor the supply pressure at the isolation elbow as the main burner lights. If pressure drops significantly, check gas pipe sizing and
quality of pipe bending. Check for debris in the gas supply and or gas filter if fitted.
b.
Check that another appliance is not affecting the gas supply pressure.
c.
Check the points raised in Sections 21.3 and 21.4.
20.6 - POOR FLAME PICTURE
a.
Check the supply pressure is correct at the isolation elbow. If the pressure is low, check gas pipe sizing, quality of pipe bending. Check for
debris in the gas supply and or gas filter if fitted.
b.
All Control Systems have a pressure point to allow the Burner Pressure to be checked. On the Manual Control it is visible at the front left of
the control. On the 2 Remote Control Controls it is the left pressure test point facing the front. Ensure the pressure test point screw is fully
closed after checking. You may wish to check ‘c’ first.
c.
Check that another appliance is not affecting the gas supply pressure.
d.
Check that the Flue Terminal and Guard are not damaged or covered in any way.
e.
Check the Fuel bed layout is as detailed in Section 16.
f.
Check that none of the fuel cutting aid as not been accidently left in the flue.
g.
Check that the flue pipe as not be forced into the flue spigot too far, (over 40mm) and past its stop blocking off the flue flow.
20.7 - FIRE OPERATES FOR A WHILE THEN GOES OUT
a.
Check the supply pressure is correct at the isolation elbow with all other gas appliances working. If the pressure is low or fluctuating up
and down check gas pipe sizing, quality of pipe bending. Check for debris in the gas supply, pilot pipe and or gas filter if fitted.
b.
Check the points raised in Sections 21.2 and 21.3.
c.
For the Manual Control check that the Thermocouple Electrical Connections is tight and check the pilot flame size.
d.
For the 2 Remote Control Systems check that the Control is functioning correctly as detailed in Section 2.4 and also specifically check the
Thermocouple Electrical Connections and Pilot Flame size.
e.
Check that the Fuel Bed Matrix’s and the Rear Matrix Support are fitted correctly.
f.
Check that the Flue Terminal and Guard are not damaged or covered in any way.
g.
Also see Section 21.3.g.
h.
See 21.6 g.
20.8 - THE RADIO FREQUENCY CONTROL SYSTEM DOES NOT OPERATE
a.
Check the control is being correctly operated - see Section 2.4
b.
Check for error messages and check batteries - see Section 2.5
c.
Reset the Mertik Maxitrol Logic Circuits - see Section 2.6