K4
Changes in models reserved.
Dimensions not binding!
Operation
6.4 Blocking Codes
Temporary blocking condition is given with the capital „F“ on the status display and error code on the
temperature display:
The boiler controller recognizes also the fault situations that can block the heat demands but do not
lead to lockout condition. When the error condition becomes resolved, error will disappear but will be
also written into the history data.
Symbols
is being shown only in case of lockout condition which needs to be solved by Service
people.
Blocking code Description
F07
Flue gas temperature is too high
F13
Remote reset volatile lockout
F34
Low power supply from mains
F37
Water pressure is too low (blocking code is shown alternatively with WP value if WPS is used)
F39
Outdoor sensor error
F40
Water pressure in the CH installation is too high
F41
Water filling (auto) is running
F42
Water filling (auto) not completed
F43
Low water pressure after auto water filling attempts
F47
Water pressure sensor not connected
F50
DHW solar storage tank BOTTOM sensor error (only when DHW configuration is 2 or 4)
F51
PT1000 temperature sensor error (only when DHW configuration is 2 or 4)
F52
DHW water temperature sensor error
F53
Flue gas temperature sensor error
F81
Drift test waiting
F07
If the flue gas temperature exceeds the maximum set flue gas temperature, the controller will stop, indicating
F07.
A blocking timer of 15 minutes is set. If the exhaust temperature is within normal levels after this time expired,
F07 will be resolved by itself.
F13
All attempts to reset the error remotely, either from OT unit or by button, will fail. It is a volatile lockout which
disappears after removing supply.
F34
Low Mains voltage (less than 170 VAC) will trigger this error. In case of boiler running, the burner is switched
off. When mains brought back (over 170 VAC), the error is resolved.
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