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8
Faults - Probable causes - Solutions
If faults arise in ignition or operations, the burner performs a
"safety stop", which is signalled by the red burner lockout LED.
The display of the operator panel visualises alternately the lock-
out code and the relative diagnostic.
To restore start-up conditions, refer to the "Reset procedure" at
page 36.
When the burner starts up again, the red LED goes out.
8.1
Error codes list
Error
Diagnostic code
code
No Comm
2
#
1
2
4
3
#
0
1
4
20
68
84
4
#
0
1
2
6
18
24
66
70
82
86
7
#
0
3
3...255
12
#
0
1
20068470
Faults - Probable causes - Solutions
Meaning of the REC 27.100A2 system
No communication between REC 37.400A2 and
RDI21...
No flame at the end of TSA1
No flame at the end of safety time 1 (TSA1)
No flame at the end of safety time 2 (TSA2)
No flame at the end of safety time 1 (TSA1)
(software version V02.00)
Air pressure error
Air pressure switch off
Air pressure switch on
Air pressure on – Lockout alarm at start
Air pressure, fuel pressure on - Alarm lock at start
Air pressure, POC on – Alarm lockout at start
Air pressure, fuel pressure, POC on - Alarm lockout at start
Extraneous light
Extraneous light during start-up
Extraneous light during switch-off
Extraneous light during start-up – Lockout alarm at start
Extraneous light during start-up, air pressure - Alarm
lockout at start
Extraneous light during start-up, fuel pressure - Alarm
lockout at start
Extraneous light during start-up, air pressure, fuel pressure
- Alarm lockout at start
Extraneous light during start-up, POC – Alarm lockout at
start
Extraneous light during start-up, air pressure, POC - Alarm
lockout at start
Extraneous light during start-up, fuel pressure, POC -
Alarm lockout at start
Extraneous light during start-up, air pressure, fuel
pressure, poc - Alarm lockout at start
Loss of flame
Loss of flame
Flame loss (software version V02.00)
Flame loss during TÜV test (flame loss test)
Valve leak detection control
V1 leaks
V2 leaks
54
In the event of a burner lockout, more than two
consecutive burner reset operations could cause
damage to the installation. On the third lockout,
contact the Aftersales Service.
WARNING
If further lockouts or burner faults occur, interven-
tions must only be made by qualified, authorised
personnel (as indicated in this manual, and in
compliance with the laws and regulations current-
DANGER
ly in force).
Recommended measures
Check the wiring between the control box REC 37.400A2 and
display RDI21...
The diagnostics covers the period between the closure of the
fuel valve to the point the flame loss is detected (resolution 0.2
s value 5 = 1 s).
Leak test
Check if the valve on the side of the gas has any leaks.
Check the wiring and make sure that the circuit is open.
Leak test
Check if the valve on the side of the burner has any leaks.
Check if the pressure switch for the leak test (PGVP) is closed
when gas pressure is not present.
Check the wiring and check if there is a short circuit.
GB
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