Supplied By www.heating spares.co Tel. 0161 620 6677
25
LED 1 shows 1
LED 2 shows
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
24
26
30
31
32
33
36
37
38
41
42
44
60
28
29
61
65
12
18
19
25
Reason
False flame
24V short circuit
No flame detected
Internal fault (PCB)
Lockout then power off
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Flow/return sensors reversed
Insufficient gas pressure
Internal fault (PCB)
Short circuit on flow sensor
Short circuit on return sensor
Short circuit on inlet sensor
Open circuit on flow sensor
Open circuit on return sensor
Open circuit on inlet sensor
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
No signal from fan
No signal from fan
Internal fault (PCB)
Insufficient fan speed
Condense trap blocked
Flow temperature too high
Return temperature too high
Rapid temperature increase
LED 1 shows 2
LED 2 shows
0
1
2
3
4
5
6
7
8
9
Reason
Standby
Purge
Ignition
CH mode
DHW mode
Fan-speed low
Built-in delay
CH over-run
DHW over-run
High temperature
LED 1 shows 3
LED 2 shows
°
C Temperature of flow sensor at time
of lockout
LED 1
0
1
2
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
9
9
9
9
LED 2
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
24
26
30
31
32
33
36
37
38
41
42
44
60
28
29
61
65
12
18
19
25
Reason for lockout
False flame
24V short circuit
No flame detected
Internal fault (PCB)
Lockout then power off
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Flow/return sensors reversed
Internal fault (PCB)
Difference between flow & return
temperature too high
Short circuit on flow sensor
Short circuit on return sensor
Short circuit on inlet sensor
Open circuit on flow sensor
Open circuit on return sensor
Open circuit on inlet sensor
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
No signal from fan
Internal fault (PCB)
Internal fault (PCB)
Insufficient fan speed
Condense trap blocked
Flow temperature too high
Return temperature too high
Rapid temperature increase
7.6
LOCKOUT FAULT CODES
The built-in fault diagnostic system automatically
displays a unique fault code that can be used to
determine why the boiler has locked out.
7.7
DIAGNOSTIC RECALL
In addition to displaying a fault code, the appliance
memorises the operating conditions at the time of
lockout, this information can be recalled and
displayed using the following procedure:
●
Access the appliance engineer mode as detailed
in 5.10.
●
Press the MODE button until a flashing ‘1’
appears in LED 1.
●
Press the STEP button to recall the information
as detailed below.
Press the RESET button to exit the appliance
engineer mode.