12 Troubleshooting
12.1 Error codes
The boiler is fitted with an electronic regulation and control unit. The heart
of the control system is a microprocessor, the eSMART
®
, which controls
and also protects the boiler. In the event of an error, a corresponding code
is displayed.
The meaning of the error codes can be found in the error table.
Important
Note the error code displayed. The error code is needed to find
the cause of the error quickly and correctly and for any support
from Remeha.
12.1.1 Warning
A warning is displayed if an error may occur. The control panel shows a
warning code.
Note
The boiler continues to operate but the cause of the warning must
be investigated. A warning can result in the boiler becoming
blocked or locked out.
Tab.37 Warning codes
Code
Text display
Possible cause/check
A01.21
Maximum Dhw Temperature Gradient Level3
Exceeded
Temperature warning:
Check the flow.
A02.06
Water Pressure Warning active
Water pressure warning:
Water pressure too low; check the water pressure.
A02.18
Object Dictionary Error
Configuration error:
Reset
and
.
A02.37
Uncritical device has been disconnected
SCB PCB not found:
Check the connection.
A02.45
Full Can Connection Matrix
SCB PCB not found:
Carry out an auto-detect.
A02.46
Full Can Device Administration
SCB PCB not found:
Carry out an auto-detect.
A02.49
Failed Initialising Node
SCB PCB not found:
Carry out an auto-detect.
A03.17
Periodically safety check ongoing
No action required; device restarts itself.
12.1.2 Blocking
Blocking occurs as a result of a fault. The control panel shows a blocking
code.
Important
The boiler only starts up again only when the cause of the block
ing has been rectified. Blocking can result in the boiler being
locked out.
12 Troubleshooting
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