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The following graphs describe the blocking codes of the water heater. A blocking code is only a temporary blocking of the water heater,
because of an extraordinary situation. The water heater will continue to operate after stabilisation of this situation.
B
C
LOCKING
ODES
The display is not blinking, but is lightened up during the blocking period. The water heater is blocking an action because of an extraordinary
situation.
This action will be continued after stabilisation of the situation.
Display message
Reason
The controller received a new heat demand too quick after the last ended demand.
Display message
Reason
The flue gas temperature has exceeded the limit, as set in the parameters.
Display message
Reason
The flow temperature has exceeded the blocking temperature, as set in the parameters
Display message
Reason
The return temperature has exceeded the blocking temperature, as set in the parameters, but the return
temperature has not exceeded the lock-out value.
Display message
Reason
Temperature difference T2-T1 has exceeded the blocking value as set in the parameters.
Display message
Reason
The water heater starts its deairation function and after will return to normal operation. This function can be
activated by parameter P4AJ.
Display message
Reason
Temperature difference T2-T1 has exceeded the blocking value, as set in the parameters.
Display message
Reason
Water pressure is too low or too high.
Display message
Reason
One of the cascaded water heaters causes an error, because of a lock out.
Display message
Reason
Wrong electrical power supply is connected (Not 50 or 60 Hz, 220-240 Volt).
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77
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