
5.
Trouble-shooting
Neptune_GB_Ver.2.0_10/03
K1
K2
Y1
B2
MT
B3
24 V
8V
B8
B4
B6
B1
B9
S1
B7
ON
1
2
B8
B4
B6
B1
B9
S1
B7
K1
K2
Y2
Y1
B2
MT
B3
24V
8V
X
-
X
o
X
X
X
X
X
X
X
X
X
o
o
VAC
24
VDC
12
VDC
5
MP1
+24
VA
C
VAC
400
K1
K2
Ohm
F2
F1
3. “Power Off” Check
Disconnect machine from mains power.
With Ohm meter in ‘sound mode’.
Power off. Pressure O.
O.k.
if
If not o.k. check,
Connection to coil A1-A2
Go to power ‘On Check’
Coil on fuel pump
Flow switch position
Connections in motor plug
Change sensor B3
Transformer
Transformer
Level switch anti scale
Micro switch setting
Level switch oil
Temperature sensor
Level switch in fuel tank
Go to power ‘On Check’
Wire and flame sensor
1. “Power On” Check
Turn to cold.
Stand-by.
Check all three phases
on K1.
2. K2 Check
Start relay to power up the burner.
Stop the Machine.
Turn switch to start and further
to hot mode. Check visually that
the relay K2 is switching on.
NB: this test must be carried out
within the time (20 s) the
machine is running in by-pass.
Before you change the control board run through these tests:
Electrical tests
27.
! DC !
! DC !
Pic. 5.2:
K1 & K2
Pic. 5.1:
PCB A1
Содержание Neptune 5
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