Alde COMPACT 3000 92X Service Manual

8
3:2:3 IGNITION SPARK IS GENERATED BUT
THE BOILER DOES NOT START
Cause:
- No or poor gas supply.
- No or faulty spark on the spark electrode.
- The solenoid valves do not open.
- Faulty soft start valve.
- Faulty electronic ignition unit.
- Nozzle blocked.
- Faulty wiring.
- Flue blocked.
Action:
- Check that the gas pressure to the boiler is correct (28-50
mbar).
- Check that the ignition cable is intact and that there are
no short-circuits along the cable
- Check when starting that voltage is being supplied to the
solenoid valves. If not, replace the electronic ignition unit
- Check that a clicking sound can be heard from the sole-
noid valves. Check the valves one at a time by removing
the at-pin contacts. Replace if there is a fault.
- Remove the soft start valve (see the exploded diagram)
and attempt to restart. If the boiler now ignites, the soft
start valve must be changed. (NB! The boiler ignites a
little harder without the soft start valve).
- Remove the burner and check that the spark electrode is
intact and correctly tted (see g. 6). Replace if neces-
sary.
Flame
sensor
2,5-3,5 mm
Spark
electrode
3:3 THE LPG BOILER STARTS BUT GOES OUT
AFTER APPROX. 10 SECONDS
(RED LED COMES ON)
Cause:
- The ame sensor cable is damaged.
- Faulty electronic ignition unit.
- Sensor damaged or incorrectly positioned.
Action:
- Check that the ame sensor cable is intact and correctly
connected.
- The only way to check whether the electronic ignition unit
is working is to change it and then check that the boiler is
operating properly.
- Remove the burner and check that the ame sensor is
intact and correctly tted (see g. 6). Replace the ame
sensor if necessary.
Fig 6.
- Check that there is voltage (12 V) on at-pin terminal
12 (grey cable, low temperature) and terminal 22 (blue
cable, high temperature) see g. 2. If there is no voltage
on terminals 12 and 22, but there is voltage on terminal
11 (red cable), the operating thermostat must be repla-
ced.
- Check that the hoses (g. 5:1 or 5:2) between the fan
housing and pressure switch are intact and correctly
tted.
- Check that the voltage to the fan is at least 9 volts +/-0.2
and that no abnormal noise can be heard. At 9 volts, the
current consumption shall be approx. 0,4-0,6 A. In the
event of a fault, change the fan.
- Check that the pressure switch is making a clicking noise
2-5 seconds after the fan has started, or check that there
is voltage on the at-pin terminal of the blue cable, con-
nection no. 2 (see g. 4 B).
- If the fan does not start, check that there is 12V in both
the red and white cables. If there is 12V only in the red
cable, the pressure switch should be replaced.
- Check that the wiring connections are intact and are cor-
rectly tted.
- Replace the electronic ignition unit. If this has no effect,
replace the printed circuit board.
Spark
electrode
Flame
sensor
- Remove the nozzle and blow the nozzle and gas pipe
clean.
- Check the wiring contact points again.
- Check that the exhaust cowl and the intake/exhaust
hoses are free from objects that may obstruct the air
supply.

Alde COMPACT 3000 92X Specifications

General

Brand	Alde
Model	COMPACT 3000 92X
Category	Boiler
Language	English