Specifications

9.4 Sheet
4:
Check
Electronic
and Hydraulic System
/
lsvoltage
\
5tol5VDCatDC
Check that Multiplug
A
connections
are clean,
tight
and correctly
positioned.
ls Multiplug A
tested?
Check that wire is
connected to Terminal
l, ll
or
lll.
ReL to note 1
0
Pull otf connection
of NTC
probe.
Ref. to note
7.
ls NTC
probe
tested?
Replace faulty
P.C.B.
with
Main Switch.
Ref. to note 1.
z
ls voltage
'
tol5VDCat
Solenoid? Ref. to
ls Micro
Switch
on
FFD tested?
Check
grey
connections
on FFD Micro
Switch
lor 24OV AC from
Terminal
5 to
connections. Replace
Micro
Switch if faulty.
Replace
faulty
NTC
probe.
Check black connections
on FFD Micro Switch
clean, tight
and
correctly
oositioned
tor 5 to
15 V DC from
brown
connection on DC
solenoid to black FFD
connections. Reolace
Micro Switch if faulty Ret.
to note 8.
Re{it connection
to NTC
probe.
Has fuse
on
Electronic
P.C.B.
Replace 0.25 Amp.
fuse.
Replace taulty
Electronic P.C.B.
Ref. to note
9.
Nole
6:
The D.C.-voltage of 5-15
V
is
controlled at
the
supply
terminals
of the solenoid
vatue. Attention!
When the indicator
tums.to the
left,
the measuring
lines must be
reversed.
On ignition ot the bumer
there
must be a D"C.-voltage
ot 15 V.
The voltaqe decroases
according
io the
flow
temperature until the electronic
(at
approx.
5.
V D.C.-voltage)
tums oft
the solenoid
valve
(dead)
and
the burner
extinguishes.
Thls test shows whether the
NTc-sensor has an inner shorl
circuit
(resistance
down at zero).
For this
purpose, pull
the NTC-
sensor
plug
off
when the
appliance is cool
(Jlow
temperature
less
lhan 50'C).
lf the electronic is satisfactory,
the appliance must operate.
52
Note
7: