REMEHA Calenta 25s, Инструкция по установке и обслуживанию

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Shutdown
code Description Probable causes Checking / solution
5v[18
(1)
Configuration fault or PSU
PCB not recognised
4
Wrong PCU PCB for this
boiler
4
Replace the PCU PCB
5v[19
(1)
Configuration fault or
parameters
df
-
dV
unknown
4
Reset
df
and
dV
5v[20
(1)
Configuration procedure
active
4
Active for a short time
after switching on the
boiler
4
No action required
5v[21
Communication error with the
SU PCB
4
Bad connection
4
Check whether the PCU PCB has been
correctly fitted in the connector on SU PCB
5v[22
No flame during operation
4
No ionization current
4
Purge the gas supply to remove air
4
Check that the gas valve is fully opened
4
Check the supply pressure
4
Check the operation and setting of the gas
valve unit
4
Check that the air inlet and flue gas discharge
flues are not blocked
4
Check that there is no recirculation of flue
gases
5v[25
Internal error on the SU PCB
4
Replace the SU PCB
(1) These lock-outs are not stored in the fault memory
8.3 Error memory
The boiler control is equipped with an error memory. The last 16 errors
encountered are recorded in this memory.
In addition to the error codes, the following data are also saved:
4
Number of times that the error occured: (
MK[xx
).
4
Boiler operating mode selected (
5t[xx
).
4
The flow temperature (
t1[xx
) and the return temperature
(
t2[xx
) when the error occured.
To view the error memory, you first have to enter access code
0012
.
8. Troubleshooting Calenta 25s - 28c - 35s - 40c
90 040412 - 7600585-01