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Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 41
5.0 Troubleshooting
5.1 Troubleshooting Guide
Troubleshooting > Troubleshooting Guide
Bonus Plus Troubleshooting Guide
PROBLEM
ROOT CAUSE
Solution
No
Heat
in the System
Thermostat (H) set too low
Set Thermostat higher
Fan cut out because the min. thermostat temperature has fallen
below 90 °C (194 ºF).
Press Reset Switch (G)
Overheat thermostat triggered
Reset thermostat
Termovar (Mixing Valve) is closed or defective
Check valve for proper operation Check
balancing valve for proper position which
is half open
Circulator pump is not running
Switch on or replace pump
Insufficient water in the system
Add water to the system Note: Never add
water to an overheated boiler. Wait until
the boiler has cooled down
Air in the system
Bleed air from system
Fuse (D) is blown
Replace fuse in boiler control
Combustion will not stop
Excessive chimney draft
Have a serviceman install a draft regula-
tor
Loss of pressure in the system
Bleed the system and add water
The fan does not switch off when
the fire burns out
If the boiler is operated from cold, the flue gas temperature
must reach normal operating temperature (above 90 °C (194
ºF)) to switch over the min. thermostat. If normal operating
temperature is not reached, the fan will not switch off but
continue to run, even though the wood has burned out and the
min. thermostat temperature has fallen below 90 °C (194 ºF).
Ensure that the boiler is brought to normal
operating temperature (about 85-90 °C
(185-194 ºF)) each time it is used.
Boiler temperature doesn’t increase
or increases slowly
Incorrect air settings
Check the air settings (adjust the primary
air shutter as necessary).
Dirty heat exchange tubes
Confirm that the heat exchanger tubes, the
upper firebox and the combustion tunnel
are clean (see Section 4.10 Cleaning and
Maintenance).
Blocked primary air
Confirm that the primary air injection
ports are clear and flowing freely.
Leaking door gaskets
Confirm that the ash door gaskets are in
good condition and the door is sealing
properly. A leaking ash door seal will
reduce primary and secondary air flow
and result in poor performance and re-
duced output.
Draft fan
Check the condition of the draft induction
fan blades (see Section 4.10.2 Cleaning
the Induction Fan).
Improper flue gas temperature
Check the temperature of the flue gas; it
must be in the range of 150º C to 200º C.
If it is too low, the wood is probably not
suitable. Try with a different type of wood
or different lot.
The fuel
Test the moisture content of the wood
with a moisture meter.
Содержание Bonus Plus 30
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