0020238426_04 EASICOM 3 Installation and maintenance instructions
45
Fault code
Meaning
Possible cause
F.88
Fault: Gas valve assembly
Gas valve assembly not connected or it is connected incorrectly, short circuit
in the cable harness
F.89
Fault: Pump
Pump not connected or it is connected incorrectly, incorrect pump connec-
ted, short circuit in the cable harness
F
Wiring diagram: system boiler
X2
X14
L
N
19
10
20
16
2
4
11
13
14
18
7
17
8
X51
X51
X20
16
1
9
3
15
4
5
10
11
6
13
X51
X20
X40
X51
X30
X2
X21
X41
X22
X14
L
N
– +
24V=
RT
BUS
Burner
off
RT
230Vac
X1
FUS
X106
X32
X90
X12
X35
RT 230Vac
N
L
X1
X21
4
1
3
2
eBUS
RT 24V
Burner off
X106
1
3
4
1
3
1
2
3
M
5
4
2
1
2
1
2
1
N
L
L
24V
230V~
24V
230V~
2
6
7
9
8
1
3
4
5
11
10
1
Main PCB
2
Interface PCB
3
Temperature sensor on the heating flow
4
Temperature sensor on the heating return
5
Fan
6
Gas valve assembly
7
Pressure sensor
8
External ignition transformer
9
Heating pump
10
Ionisation and ignition electrode
11
Main power supply and connection for 230 V control
