Morco FEB-24ED - Page 44

Description of functioning
technical
48
7
DOESN´T MODULATE CORRECTLY
IN
OUT
DHW modulates
correcty?
Pump works?
Replace DHW
Thermistor
Clean
heat
Exchanger
(DHW)
Replace
Main Control
Circuit
Always at
minimum
Check wiring
Replace
Gas Valve
Replace
Front Panel
Circuit
Check wiring
or replace
DHW
T
hermistor
Always
DHW
TEMP.=50ºC
F-11
DHW Thermistor
values are OK?
Measure heating
circuit temperature
it is mor
e than 85º
C and the DHW
tempertature is
lower than set
point?
Regulate
mechanically
and electricaly
the gas valve
Check gas valve
regulation and
electrical values
of configuration
in AUTOTES
TIt´s
OK?
Check water
pressure or check
230Vac on J17
Yes Yes
Heating
modulates
correcty?
Always at
minimum?
Check SU/RA
OK
Check heating
electrical value OK?
Thermistor
values are OK?
Always Same
Set Point?
Replace Main
Control Circuit
Regulate
minimum
Configure
main control
circuit
Configure
main control
circuit
Place room
thermostat in
correct position
Replace
heating
Thermistor
Replace
Front Panel
Circuit
Room thermostat
conected to external
probe connector
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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