Malfunctions – Causes – Solutions
If a malfunction occurs, the main menu is switched to and the malfunction is displayed in display. The
malfunction is acknowledged by pressing for at least 2 seconds.
Display Malfunction designation Cause/remedy
STB >I/O<
Safety temperature limiter
is activated
Establish cause of activation; eliminate this
and reset using reset button directly at STB.
The error message must then also be
acknowledged. Only with cooled stove.
NO PELLETS >I/O< No pellets in container
May also occur on first start (first filling).
Check whether there are sufficient pellets in
the container and re-start unit after
acknowledging malfunction.
- Screw conveyor blocked
- Flame sensor sleeve dirty
- Chimney draught too great
FAN DEFECT >I/O< Flue gas blower defective Contact your local service agent.
FLAME SENSOR DEFECT >I/O< Flame sensor defective Contact your local service agent.
GRID DEFECT >I/O<
Tilting grate door motor or
tilting door contact defective
Contact your local service agent.
ROOM SENSOR >I/O< Room sensor defective Check room sensor and replace if required.
SERVICE >I/O<
Pellet amount for cleaning
and maintenance exceeded
Acknowledge the message and conduct
cleaning or maintenance procedures.
DOOR OPEN Door open
Check to make sure the door is closed and
that the door contact switch engages.
(The DOOR OPEN message doesn’t need to
be acknowledged; the display will disappear
when the door is closed.)
Problem
Fire burns with weak, orange flame. Pellets heap up in fire crucible, window sooted up.
Cause(s):
1. Insufficient combustion air
Possible solutions:
1. Check correct positioning of fire crucible in holder – fire crucible must be positioned tightly in the holder.
2. Remove any ash or clinker from the fire crucible that may block the air inlets, change to a better pellet
quality is possible.
3. Check whether flue gas pipes are blocked with ash (see section on “Cleaning and Maintenance”).
4. Check whether air inlet duct or flue pipe is blocked.
5. Check door seal and cleaning cover seal for leaks.
6. Clean blower wheel.
7. Have service performed by authorised specialist company.
Please note that checks on the control system and wiring may only be performed with the stove turned off.
Any repairs may only be performed by trained specialists.
If a malfunction message occurs, the cause must first be remedied; the unit can be put back into operation
by acknowledging the malfunction using .
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