Grant Vortex Eco 21/26 - 11 - Fault Finding; 11.1 Burner Fault Finding

43
Grant Vortex Eco Utility Oil Boilers
11 - FAULT FINDING
Burner fault finding
11.1
Motor/pump
seized
or tight
Replace
motor
capacitor
Burner
motor runs
Check L & N
to control
box
Check
boiler
contro
ls
Motor gives
50 Volts
to white wire
*
Replace
burner
motor
Repair
or replace
motor/pump
Lockout
after 12 sec
purge
Lockout
within
1 second
Replace
solenoid
coil
Coil of
solenoid
sound **
Repair or
replace
oil pump
Washing
pressure
1to2
bar
Photoce
ll
sound ***
If balanced f
lue,
remove air tu
be
and retest
Resea
l
balanced f
lue
or reposition f
lue
Replace
photoce
ll
Drive
coupling
broken
Pump
produces
pressure
Replace
nozzle
Contaminated
fuel or
filter
Combustion
air set
Flame off
and
relights
Boiler or
flue
blocked
Combustion
head set
YES
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
NO
NO
NO
Check and
set the
electrodes
Replace
the
contro
lbox
Ignition
spark
proved
NO
NO
NO
NO
NO
OK
NO
NO
NO
NO
Solenoid
valve
operating
Replace
contro
l
box
Check oi
l
pressure
regulator
Replace coi
l
and/or
stem va
lve
Nozzle
atomising
fuel
NO
YES
NO
NO
Notes
*
**
***
Motor white wire returns 50
- 53 V
AC
to contro
lbox.
Test solenoid coi
l for continuity or 100
ohms.
Test photoce
ll by disconnecting it in
controlbox. If burner fires and then
goes to
lockout
, photoce
ll should be
replaced.
Itisbest to rep
lace the photoce
ll if it is
suspect
.
Burners on
balanced f
lue systems can
recircu
late flue products causing
burner recyc
ling.If this happens
,
check f
lue position and sea
ling.