Desa Master WA 33 Operating Manual page 39

10. Repair of defects
In the case of the failure of the device, the list below may help in locating the defect. In general, its
removal is simple. The most frequent problems are listed below. The digits signify the possible causes
The order of the digits expresses the probability of occurrence of the defect.
Before starting any activities, pull the plug out of the mains socket.
DEFECT
The pump does not commence operation and the pump operation control is not lit 6-3-7
The flame is put off and the pump is still in operation
The combustion chamber rumbles.
There is soot in the combustion chamber and in the chimney
The non-burnt oil remains on the combustion plate.
No.
Lack of power supply.
1
Water or deposit in the tank.
2
The pump motor cannot be switched on
3
The motor and the pump are not operable
4
The fuel conduit is clogged, the oil returns
5
to the tank by means of the return conduit
The thermostat of the pump operation
6 control has not reached the right
temperature
Overflow protection is full
7
The safety thermostat (STB) does not
8
operate correctly or does not operate at all
Insufficient combustion air inflow
9
Improper flue draught
10
The flue draught is too strong or too
11
variable
The flue draught is too weak
12
NOTE:
CAUSE
CAUSE
8-9-11-12 or there is too much
diesel oil at the start-up
METHOD OF REMOVAL
•
Check whether the plug is in the socket and check
the fuses
•
Clean the tank and the filter
•
Check the STB and the overflow protection
• The fuel is to dense or too cold. Dissolve it with
diesel oil
• Check the pump operation control thermostat and
replace it if necessary.
• Check the motor and see whether the pump is not
dirty inside.
• Check the STB and the overflow protection
•
Clean the fuel conduit or replace it, if necessary
• Wait until the furnace cools off and restart it
•
Replace the thermostat
•
Clean it
• Reset the thermostat
•
Replace it
• Clean the openings of the furnace chamber
•
Check the proper operation of the fan
• Check whether the chimney pipe is mounted in
accordance with the recommendations entitled
„Mounting the chimney flue"
•
Check the leakproofness of the chimney system
•
Clean it, if necessary
•
Mount the flue draught stabiliser and regulate it to
minimum 2 mm W.C. (16 Pa).
• Check all the connections
• Decrease the number of bends
• Extend the chimney
• Insulate the chimney pipe outside the building
•
See all the information regarding the chimney flue
in the manual.
11
2-5-9-10-12
10-11-12
8-9-10-11-12