Pereko KSP Duo, Operation And Maintenance Manual

Page: 68 / 84

44
20 Troubleshooting
Faults Hints
The display is blank despite
connection to power supply.
Check:
if the main fuse is burnt-out and replace if so,
ƒ
if the lead connecting the panel with the module is properly
plugged in, and if it’s not damaged.
Preset CH temperature on
the display is different than
the programmed one.
Check, if:
HUW container is being filled and preset HUW temperature is set at
the value higher than boiler preset temperature. If YES - read-out
variations will disappear once HUW container has been pre-heated,
or reduce preset value of HUW container.
room thermostat is ON
– set the service parameter Red. preset b.
temp. at ,”0”
ƒ
night time decrease is ON; if YES- switch it off
CH pump is inoperative.
Check, whether:
ƒ
boiler temperature has exceeded the value set in CH pump
activation temperature (MENU
→
boiler pump). If YES- wait or
reduce the value set in this parameter,
ƒ
room thermostat prevents start of CH pump. If YES - set the
parameter CH pump standstill time
– at ,”0”. See -sec.30
ƒ
HUW priority to prevent CH pump start is ON. If YES- disable it
by setting HUW pump mode at No priority. See sec.11
ƒ
HUW pump is damaged or locked.
The fan is inoperative.
ƒ
If YES, and the boiler temperature is lower than the preset
value by DelT lack of fuel - it is a normal condition related to
detection of lack of fuel..
Fuel feeder inoperative/
fails to feed.
ƒ
blow-in output is too low - increase it,
ƒ
check whether connecting terminals 1-2 of STB safety
temperature limiter are bridged (jumper should be provided only
in case temperature limiter is not connected).
ƒ
if the boiler is equipped with STB temperature limiter with
manual return to home position - release the limiter. To do this,
remove the lid and press push-button acc. documentation
provided by boiler manufacturer,
ƒ
check the setting of "Fuel Feeder and Blow-In and set at ON in
MENU
→
Boiler Settings ,
ƒ
check the fan and replace, if necessary,
When the Individual Fuzzy
Logic mode is on, the fuel is
not
completely burned,
there are unburned
particles of fuel in the ash.
ƒ
check whether feeder wires are correctly connected to the
terminals,
ƒ
if STB temperature limiter is connected to terminals 1-2 - check
whether power supply has not been cut off due to boiler
overheating,
ƒ
check whether feeder motor is not faulty,
ƒ
check the setting of "Fuel Feeder and Blow-In and set at ON in
MENU
→
Boiler Settings ,
ƒ
in case motor is running and fuel is not supplied - replace cotter
pin in coupling of fuel feeder acc. boiler manual.
When the Individual Fuzzy
Logic mode is on, the fuel
burns out too intensively
ƒ
reduce fuel feeding rate by lower setting of the parameter Fuel
correction in Fuzzy Logic mode. See sec. 7.7,
ƒ
check whether incompletely burnt fuel comes from operation in
SUPERVISION mode. If YES - adjust this mode acc. sec. 11,
ƒ
check whether incompletely burnt fuel is produced by frequent
change-over from SUPERVISION to OPERATION mode and V/V,
Cycle order OPERATION acc. sec. 36,
ƒ
if the regulator has the option of fuel type selection - make sure
the correct fuel type has been selected (see sec. 7.10
– Fuzzy
Logic mode does not allow burning a blend of fine coal and ECO-
pea coal),