15
ENG-030B/p.392
symptom
reason
action
The indicators on con-
trol panel are off
lack of boiler power supply
check parameters of the power network and fuses
contact an authorised service
The “K’ indicator
flickering
check parameters of the power mains and fuses
contact an authorised service
B indicator flickers
pump is blocked
unblock the pump by unscrew the screw on pump hous-
ing and move the pump rotor manually
medium doesn’t circulate through the boiler
- boiler is blocked
an air-bound central heating system, installation, the
pump and the boiler vent the installation, pump and
boiler
check patency of central heating system clean the filter
a failure of pump’s power supply
contact an authorised service
a failure of pump or flow sensor
contact an authorised service
C indicator is off , room
thermostat sends heat
on signal
a failure of installation that connect a room
thermostat
check installation
a failure of electronic module
contact an authorised service
D indicator flickers a failure of inlet temp. sensor, boiler in failure
condition
contact an authorised service
E indicator flickers a failure of outlet temp. sensor, heating is
blocked
contact an authorised service
C indicator flickers
when The master appli-
ance doesn’t work
a failure of installation that connects the master
appliance
check installation
a failure of electronic module contact an authorised service
Boiler doesn’t heat a
cylinder
a failure of cylinder temp. sensor or thermostat contact an authorised service, replace cylinder temp.
sensor or thermostat
a failure of three-way valve actuator replace the actuator
a failure of electronic module contact an authorised service
J panel display shows
“_“,”_ _“, B indicator
flickers
medium temperature in the circuit is too low,
medium flow rate reading error
wait until the start-up procedure is finished
Failures
In case, the boiler does not
work properly after the above
checks and none of the failures
is present, contact an authorised
serviceman.
User instructions
