Troubleshooting - Notes For The Expert - EINHELL DHG 200 Bedienungsanleitung

Anleitung_DHG_200_SPK7:_
GB
Air filter (Fig. 5)
The air suction filter (A) must be replaced every 500
operating hours or earlier, if necessary, or cleaned
with soapy water. After cleaning, let the air suction
filter dry.
Both air outlet filters (B/C) are to be replaced every
500 operating hours, or beforehand if necessary. To
replace, unscrew the filter cover (D).
Fan wings (Fig. 6)
The fan wings (E) must be cleaned at least once per
heating season, or if necessary, more often. Remove
dust and other dirt with a soft cloth. Be careful not to
bend the fan wings. To replace the fan wings,
unfasten the screw (F) and pull the fan wing off the
motor shaft (G).
Fuel nozzle (Fig. 7a/7b)
The fuel nozzle (H) is to be cleaned or replaced at
least once per heating season or more often, as
needed.
Clean the fuel nozzle at the front with compressed air.
To remove adhesive dirt, it may be helpful to soak
and wash out the fuel nozzle with clean fuel. Take
care not to mix up the two hoses (K/L).
Names of items in Fig. 7a/7b:
Item K = air hose (-connection)
Item L = fuel hose (-connection)
Item M = ignition cable
Item N = ignition electrode
Item P = burner head
Ignition electrode (Fig. 8)
The ignition electrode (N) must be cleaned or
replaced every 600 operating hours or earlier, as
necessary. Clean the ignition contacts (Q) carefully
with a wire brush. Check the separation distance
between the ignition contacts (Q). It must be 3.5mm
Photo cell (Fig. 9 / 10)
The photo cell (R) is to be cleaned or replaced at
least once per heating season or earlier, as
necessary. Clean the front of the photo cell with an
alcohol-soaked cotton cloth. Take care to fit the photo
cell in the right position.
Fuel filter (Fig. 11)
Clean or replace the fuel filter (S) at least twice per
heating season, or if necessary, more often. The fuel
filter must be washed out with clean fuel.
Note: To detach the fuel filter, turn it 90° clockwise.
18
27.03.2009 14:34 Uhr Seite 18
Adjusting the pump pressure (Fig. 12)
The optimum pump pressure is 4 PSI +/- 10% (0.28
bar). Turn the adjusting screw (T) with a screwdriver
until the manometer (Item 6) shows 4 PSI. Turn
clockwise = higher pressure, turn anticlockwise =
lower pressure.
14. Troubleshooting - Notes for the
expert
Problem
Flame ignites, but the heater switches off after a short
time, the LED flashes.
Possible cause
1. Pump pressure is incorrect
2. Soiled air filter
3. Soiled fuel filter
4. Soiled fuel nozzle
5. Soiled photo cell
6. Photo cell incorrectly assembled
7. Faulty photo cell
8. Inadequate electrical connection between
electronic circuit board and photo cell
Remedy
1. Adjust the pump pressure
2. Clean or replace the air filter
3. Clean or replace the fuel filter
4. Clean or replace the fuel nozzle
5. Clean or replace the photo cell
6. Install the photo cell correctly
7. Replace the photo cell
8. Test the electrical connection between the
electronic circuit board and the photo cell
Problem
Heater does not work at all or fan motor only runs for
a short time. The LED flashes.
Possible cause
1. No fuel in the tank
2. Pump pressure is incorrect
3. Corroded ignition electrodes or incorrect
separation distance between ignition contacts
4. Soiled fuel filter
5. Soiled fuel nozzle
6. Moisture/water in the fuel or fuel tank
7. Inadequate electrical connection between
transformer and electronic circuit board
8. Ignition cable is not attached to ignition electrode
9. Faulty ignition electrode