Kroll M25 - Page 15

15
Technische Änderungen vorbehalten
Malfunction and Remedy
See also operating instructions for oil burner.
The incorrect adjustment of the burner may destroy the combustion chamber and heat exchan-
ger; therefore it is important that the output is correctly set. In order to avoid condensation, the
net temperature of the ue gases (= the measured temperature of the ue gases in °C minus
the inlet temperature of the burner in °C must drop below a value of 160°C. The burner readjust-
ment must be carried out by a specialist (after-sales service for burner). The ames must on no
account touch the walls of the combustion chamber.
Warning
All work on the electrical installation
must be carried out by a qualied
electricion.
Remove power supply plug only when
the heater has entirely cooled down.
Malfunction Possible cause Remedy
The space heater is connected up,
but:
the burner does not start, when the selector
switch is set to = Heating
a) No electrical supply
b) Defective selector switch
c) Oil burner indicates a malfunction
d) Motor or capacitor defective
e) Overheat thermostat is locked
f) Room thermostat falsely set
a) Check main switch and fuses
b) Replace selector switch
c) Reset oil burner. Burner cuts again, press
reset button after 4 to 5 min.
Fault clearance of oil burner.
If there is another shut-down of the burner
on fault, press reset button once again 4-5
minutes later (see also operating instruc-
tions of the burner) After having pressed the
reset button at the burner control twice,
search for cause of trouble by
consulting the operating instructions –
if you do not succed, call for customer
service.
d) Check motor or capacitor or replace
if necesary
e) Press reset button of overheat thermostat
f) Check room thermostat setting
The space heater is connected up, and swit-
ched on the oil burner starts and
immediately indicates a malfunction
a) No oil in tank
b) Air in fuel circuit
c) Oil lter clogged
d) Stopcock closed
e) The oil in the storage tank is jellied
f) Oil burner indicates a malfunction again
a) Rell oil tank
b) Check scewed connections of fuel circuit for
leaks
c) Change lter element
d) Open stopcock
e) Activate oil preheating in the tank and
insulate the lines
f) See operating instructions oil burner
Overheat thermostat switches off a) Defective overheat thermostat a) Replace warm air thermostat
Temperature controller
continually switches off
a) Temperature controller wrongly set
b) Fan does not start
c) Fuel ow rate too high
a) Check temperature controller set
b) Check fan motor or capacitor or replace it if
necessary
c) Adjust fuel ow rate to given value
The heater is operating, but is producing
smoke
a) Nozzle is blocked
b) Filter is clogged
c) Water is in the fuel oil
d) Parafn precipates in the main lter
because there is no oil preheating
e) Not enough fuel in the tank
f) Air sucked in through leaky points
g) Defective solenoid valve
a) Replace nozzle
b) Clean the lter or renew it
c) Renew fuel oil
d) Replace oil preheater
e) Fill up the tank
f) Tighten screw joints in the oil line, replace if
necessary
g) See operating instructions oil burner
The warm air fan continues to run although it is
switched off and has cooled down
a) Defective temperature controller
b) Temperature regulator set to low
a) Replace the warm air thermostat
b) Correct the temperature adjustment
The burner runs, but the warm air fan does not
start after a short period
a) Defective temperature regulator
b) Temperature regulator set too low
c) Warm air fan or capacitor defective
a) Replace the warm air thermostat
b) Correct the temperature adjustement
c) Replace warm air fan or capacitor
The space heater is connected up,
but:
The fan does not start, when
the selctor switch is set to = Ventilation
a) No electricity supply
b) Overheat thermostat is locked
c) Capacitor defective
a) Check main switch and fuses
b) Press overheat thermostat reset button
c) Check capacitor