Keston K130 Installation And Servicing Instructions page 30

WD52/0/1997
Continued from sheet 1
Does ignition sequence start?
yes
Has the Air Press. Switc h
Are tubes and connections to
the Air Press. Switch sound?
Is the air press. across the Air
Press. Switch more than 4 in
Is the air filter dirty or the air
inlet, exhaust or condensate
Is the gas flow rate to the boiler correct
for the gas type in use (ie LPG or Nat.
yes
Is gas supply pressure at gas
Is gas burner pres sure per
specification (Section 4.7)?
Continued on sheet 3
Installation & Servicing Instructions
Chapter 5 : Fault Finding
no
Is lockout light on?
yes
changed over?
no
yes
water?
no
pipe blocked?
no
Is the Burner blocked
no
Fan faulty - change
Gas )?
no
valve correct?
yes
no
Is gas valve opening?
yes
The Keston 130 Condensing Boiler
no
Switc h off & if problem persists
replace control box.
yes Blocked air filter - replace
Faulty control box - replace
no
Correct tube connection
yes
Faulty pressure switch -
replace
yes
Replace air filter
clear blockage
yes
Clear blockage
no
Check gas supply or turn on
gas cock.
yes
Replace gas orifice.
no
Faulty gas valve - replace.
OR
OR
From sheet 3
Page : 27