80
10.17.2 B
LOCKING CODES
The following graphs describe the blocking codes of the boiler. A blocking code is only a temporary blocking of the
boiler, because of an extraordinary situation. The boiler will continue to operate after stabilisation of this situation.
The display is not blinking, but is lightened up during the blocking period.
The boiler is blocking an action because of an extraordinary situation. The action will be resumed after stabilisation
of the situation.
Display message
C a s c a d e
B l o c k
9 9 9 , 5
h r s
Reason
One of the cascaded boilers causes an error, because of a lock out.
Display message
d T
b l o c k
9 9 9 , 5
h r s
Reason
Temperature difference between flow and return exceeds the blocking value but
not the lock out value.
Display message
F l u e
t e m p
h i g h
9 9 9 , 5
h r s
Reason
Flue gas temperature has exceeded the limit.
Display message
G e n
B l o c k
9 9 9 , 5
h r s
Reason
The general blocking circuit is activated during operation = contact 7-8
Display message
L i n e
f a u l
t
9 9 9 , 5
h r s
Reason
Wrong electrical power supply is connected (not 50 or 60 Hz, 220-240 Volt).
Display message
N R V
o r
F a n
f a u l
t
9 9 9 , 5
h r s
Reason
Non-return valve contact signal activated.
Display message
O u t d o o r
s e n s o r
f a i
l
9 9 9 , 5
h r s
Reason
Outdoor temperature has exceeded the blocking temperature.
Display message
A n t
i c y c l e
t
i m e
9 9 9 , 5
h r s
Reason
The controller received a heat demand too quick after the last ended demand.
Display message
D e a i
r a t
i o n
9 9 9 , 5
h r s
Reason
The boiler starts its deairation function and after will return to normal opera-
tion. This function can be activated by parameter P4AJ.
Display message
F l o w
t e m p
h i g h
9 9 9 , 5
h r s
Reason
Flow temperature has exceeded the blocking temperature, but it has not ex-
ceeded the lock-out value
