26
FAULT FINDING: IGNITION AND BURNING
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
2.04
Check:
Receiver
ReceiverReceiver
Receiver
- Replace missing, weak or
rechargeable batteries (not
enough power to open
thermoelectric valve)
Presence of gas on pilot burner
Presence of gas on pilot burnerPresence of gas on pilot burner
Presence of gas on pilot burner
Check pilot on presence of gas
at normal ignition cycle or in
Manual Mode (turn oval knob on
gas control to MAN and keep
safety shut off valve opened with
a screwdriver) and ignite pilot
with a lighter.
- Pilot flame not on: Step 1
- Pilot flame on: Step 2
Step 1: Pilot has no gas
Step 1: Pilot has no gasStep 1: Pilot has no gas
Step 1: Pilot has no gas
- Gas tap open?
- Gas at gas control (line
pressure at measuring point
on gas control).
- Check presence of gas at
pilot burner, by igniting in
Manual mode:
Turn oval knob on gas control
on MAN, open safety shut off
valve with a screwdriver and
try to ignite pilot with a
lighter.
Not alight, then check the
following:
- Blocking of pilot tube (kink or
dirt)
- Gas flowing out of gas
control?
(by loosening pilot tube at gas
control)
- If not: check adjustment
screw pilot flame (under
black cover): sealing not to be
broken.
Sealing broken: screw should
be fully open.
- If this does not help: replace
gas control.
Step 2: Pilot has gas, but no
Step 2: Pilot has gas, but noStep 2: Pilot has gas, but no
Step 2: Pilot has gas, but no
ignition
ignitionignition
ignition
- Electrode with 90° tip:
bend tip 1mm higher
- Spark too weak (thin and
reddish). Act as if 'no spark'
in box 2.05 and perform
actions described for ignition
cable and ignition electrode.
- Pilot flame too weak (dirty).
Remove injector (remove
gland nut and the pilot tube).
See that it does not fall away.
Clean with compressed air.
Rectify. Retry.
2.03 Only one spark?
2.02 Sparking?
2.01 Can Pilot be lit?
Start
StartStart
Start
2.03a
- Loosen and retighten
earth screw on gas
control.
- If this does not work:
Replace receiver.
2.05 Check:
Ignition cable
Ignition cableIgnition cable
Ignition cable
- Present and connected
- Being free from metal parts
or concrete.
- Too long: cut away all
excessive length at receiver
end, and reconnect.
- Shorting out to earth; replace
ignition cable.
- Spark in wrong position
- Slide rubber sleeve on
ignition cable over ceramic of
electrode.
- Replace electrode if
necessary.
Ignition electrode
Ignition electrodeIgnition electrode
Ignition electrode
- Straight
Straight Straight
Straight electrode:
- Oxidation (roughen electrode
with file or sand paper)
- Position 4 mm from pilot
burner
- Cracks in ceramic (not
always
visible), replace electrode.
Thermocouple circuit
Thermocouple circuit Thermocouple circuit
Thermocouple circuit
interrupted
interruptedinterrupted
interrupted
- Check connection between:
- Thermocouple and
interrupter
- Interrupter and gas control
Is it tight? (hand tight + half a
turn)
- Black wires (yellow/red end)
not (well) connected in
thermocouple interrupter, in
right position on receiver (in
right position)
- Thermocouple broken inside
thermocouple interrupter:
Replace.
- Thermocouple interrupter
defective.
Check by screwing
thermocouple directly in gas
control and ignition in Manual
mode (see 2.04).
Starting procedure
Starting procedureStarting procedure
Starting procedure
After switching off/going out the
remote is locked for 120 sec.
(older versions 60 sec).
Wait 2 minutes before reigniting.
2.07 Check thermocouple
thermocouple thermocouple
thermocouple
system
systemsystem
system
Step 1: Check pilot flame and
Step 1: Check pilot flame andStep 1: Check pilot flame and
Step 1: Check pilot flame and
thermocouple
thermocouplethermocouple
thermocouple
- Pilot flame too small
- Pilot dirty. Rectify (see 2.04)
- Check for pilot gas tube
soundness
- Pilot tube kinks or dirt inside
- Line pressure too low
- Tip not in (correct!) pilot
flame.
Bend into flame.
Step 2: Check circuit for
Step 2: Check circuit forStep 2: Check circuit for
Step 2: Check circuit for
interruptions or short circuiting
interruptions or short circuitinginterruptions or short circuiting
interruptions or short circuiting
- Thermocouple tight in
interrupter
- Interrupter tight in gas
control
- Black wires (yellow/red end)
- Connected to interrupter +
receiver
- Short circuiting at interrupter
Step 3: Check receiver
Step 3: Check receiverStep 3: Check receiver
Step 3: Check receiver
Dismount black-red and -yellow
control cables from receiver and
link together. Ignite fire in
Manual Mode (see 2.04, light
pilot with a lighter):
- Pilot stays on: the receiver is
defective (replace) , and the
rest of the thermocouple
system is OK.
- Pilot goes out: Step 4.
Step 4
Step 4Step 4
Step 4: Check thermocouple
: Check thermocouple : Check thermocouple
: Check thermocouple
and gas control
and gas controland gas control
and gas control
Screw thermocouple directly in
gas control and light in Manual
Mode (see 2.04, light pilot with a
lighter):
- Pilot stays on: Thermocouple
interrupter defective.
- Pilot goes out:
- Thermocouple defective
- Thermo-electric device
defective Go to step 5.
Step 5: Check thermocouple
Step 5: Check thermocoupleStep 5: Check thermocouple
Step 5: Check thermocouple
Check thermocouple by
replacing or by measuring
output voltage (>5mV, with
thermocouple connected). See
Figure G1.
Step 6
Step 6Step 6
Step 6
If thermocouple is not the cause
the thermo-electric device is
defective.
Replace gas control.
8888----Wire black control cable
Wire black control cableWire black control cable
Wire black control cable
- 8-wire cable between
receiver and gas control not
connected.
- Poor contact of connector.
Check for pins on receiver
not being bent.
- One of eight wires loose in
connector.
Check by pulling wire by wire at
both ends of cable.
2.06 Pilot can be lit.
Does it stay alight?
2.08 Does main burner
ignite immediately?
2.09 Ignition procedure
2.09 Ignition procedure2.09 Ignition procedure
2.09 Ignition procedure
- Oval knob on gas control is
on "MAN". Set to "ON" and
restart.
Retarded ignition of main
Retarded ignition of main Retarded ignition of main
Retarded ignition of main
burner
burnerburner
burner
Gas to main burner opens 3-5
seconds after servo motor
operating the gas valve starts
running (sound of motor!). After
this the main burner is to ignite
(at least partially) within 10
seconds and not with a firm
noise WHOOF.
If not: no or delayed cross
lighting of main burner.
Hazardous situation. Stop
ignition procedure straight away
and first check for:
- Position of logs or pebbles
- Burner holes (locally)
blocked. Remove vermiculite
dust.
- Vermiculite missing
- Chips on burner
- Vermiculite not distributed
evenly across burner(s)
PowerVent® (if present)
PowerVent® (if present)PowerVent® (if present)
PowerVent® (if present)
Consult PowerVent®
installation manual how to carry
out the checks below.
Check:
- 230V to fan controller unit
and fan.
- Silicon pressure
measurement hoses
swapped leaking or barred
- Pressure difference set too
high
- Resistance of flue system too
high
adjustment of appliance
damper and air inlet guides)
flue length or number of
bends too large
dirty (e.g. cobwebs)
- Operation of the fan
- Operation of solenoid gas
valve
- Operation of fan controller
unit
- Operation of pressure
measurement gauge