HAAS + SOHN 417.08 Installation And Operating Instructions Manual - page 23
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5. Shutoff flue gas temp. in Heating mode too
low (21)
Cause:
• Temperature fell below the minimum
temperature in Heating mode operating
status
The following circumstances might lead to this:
• No pellets present
• The screw conveyor is not rotating, it is
jammed, the screw conveyor motor is
defective or the chute is not clear
• The required combustion air cannot be
supplied to the stove e.g. via a vapour
extractor hood that is located in the
vicinity of the installation site and is
switched on.
• Room too airtight – required combustion
air cannot be replenished in the room
• Air volume sensor dirty or defective
• Suction filter dirty
• Burner
dirty
• Poor seals on the pellet stove (door,
seals)
• Flame temperature sensor defective
• Flue gas temperature sensor defective
Correction:
¾ Check pellet stock
¾ Check that the chute between the pellet
tank and the burner is clear.
¾ Clean the burner, suction filter and air
volume sensor (paintbrush).
¾ Check whether there is a vapour
extractor hood present and whether it is
in operation
¾ Make sure for instance that a window is
left open a crack to supply the required
combustion air
¾ Contact the service engineer
6. Shutoff flue temp. in Heating mode too
high (22)
Cause:
• The highest permitted flue gas
temperature was exceeded
The following circumstances might lead to this:
• Too much fuel is being supplied to the
burner
• Flue gas temperature sensor defective
Correction:
¾ Contact the service engineer
7. Shutoff, combustion chamber door open
(6) or (9)
Cause:
• The door is open for longer than 1 minute
during operation
• The damper at the bottom of the door is
not in the right position
• Cable broken in the electric wiring to the
door contact switch
• The connector has come out on the door
contact switch or on the central unit
Correction:
¾ Close the door
¾ Move the damper at the bottom of the
door to the right position so that the
switch is operated when the door is
closed
¾ Check door contact switch, cable and
connector
8. Flue gas sensor interruption (7)
Cause:
• Flue gas temperature sensor defective or
not connected
Correction
¾ Contact the service engineer
9. Flue gas sensor short circuit (8)
Cause:
• Flue gas temperature sensor defective
Correction:
¾ Contact the service engineer
10.
Room temperature sensor interruption
(11)
Cause:
• Room temperature sensor defective or
not connected
Correction:
¾ Contact the service engineer
11.
Room temperature sensor short circuit
(12)
Cause:
• Room temperature sensor defective
Correction:
¾ Contact the service engineer
Correction:
¾ Contact the service engineer