DK9802C2 PV50c user manual ENG
Vers: C2 page20/38
Table 6 Burner status description
Status
message
Description
STOPPED
The burner is turned off from main menu.
WAITING
Burner is turned on and waits for boiler’s thermostat to switch on. There are no time limit
for WAITING status. Feeder auger works periodically at WAITING time and makes ½ rotations
after every 2 minutes. When thermostat switches on, burner goes to TESTING.
TESTING
At this state burner will run a short self-test to ensure everything is working normally. Any
failure will turn off the burner and will require attention.
CLEANING
In the end of TESTING burner starts the CLEANING procedure, during what the burning
grates are moved back and forward in order to remove ash out of burning chamber. Lower
grate moves with the help of motor down the upper grate. Ash falls to front of lower grate
and is pushed out of burning chamber. Cleaning takes place:
Always after switching burner on or resetting error state
At interrupted work after time set in PAR48 after first testing
At uninterrupted work after reaching double time set in PAR48. Burner will be stopped to
perform cleaning
Time between two cleaning cycle can be set from PAR48. If PAR48 is set to “0” no cleaning
takes place.
LOADING
At this state internal feeder will feed the pellets to burning chamber. Maximum load time is
limited to 5 minutes in normal conditions and 20 minutes when burner has been STOPPED or
run empty of pellets. Igniter is pre-heated in the end of LOADING cycle. Igniter is switched on
for max 1 min in order to save its lifetime. At the LOADING time, external auger holds
permanent fuel level in the feeder tube. Depending on the level sensor signal, the external
auger is turned on or off.
LOADING2
If flame is not detected after 4 min 10 sec second small amount of pellets according to
PAR25 is delivered to burning chamber. New attempt of ignition. If flame is not detected in
second IGNITION, E24IGNITION is displayed.
IGNITING
he pellets are in burning chamber ingnited. Igniter and fan are working until photocell
recognizes the flame. To avoid overheating igniter works 50 second cycles, staying on time
defined in PAR85. In ignition mode the fan blows hot air according to rotations set in PAR8. If
flame is not detected for 4 min 10 sec then the burner will do LOADING2 .
PRE-BURN
The purpose of pre-burn mode is to fully ignite the pellets that were loaded for ignition. Only
fan blows, igniter is switched off. Pellets start to burn. Pre burn consists of 1-4 cycles with
duration 30-80seconds each. Little amount of fuel is added between cycles. PRE-BURN time
and number of igniting cycles is pre-set with PAR41 and PAR42.
BURNING
This is the main operation status in burner operation. Burner can operate on 11 different
power levels. There are 6 main power levels, which can be selected and adjusted and 5
virtual power levels between main levels that can’t be adjusted or selected. For every power
level fan speed is fixed with PAR1...6. The fan speeds for virtual levels are calculated as
average from previous and next main level speed. External auger is holding permanent fuel
level in the feeder tube during BURNING state. The auger is controlled by fuel level sensor in
following manner:
External auger is started after level sensor does not recognize fuel in burner and internal
feeder has done 1/2 rotations set in PAR81.
External auger is stopped when level sensor recognize fuel in burner for more than ½
seconds, set in PAR82.
Burner will enter E28LEVEL fault condition in following cases:
Fuel loading timeout (no signal for specified period of time).
Fuel unloading timeout (signal lasts longer than specified period of time).
