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ENGLISH
65
matically starts a test procedure to check whether the machine is really
left definitively and permanently dry. If during the sequence of operations
an attempted reset is successful (for example, the water comes back), the
procedure is interrupted and normal operation is resumed.
Table 9 shows the sequences of the operations performed by the device
for the different types of blockage.
Automatic resets of error conditions
Display
indication
Description
Automatic reset sequence
BL
Blockage due to water
lack
-
One attempt every 10 minutes for a
total of 6 attempts.
-
One attempt every hour for a total of
24 attempts
-
One attempt every 24 hours for a to
-
tal of 30 attempts.
PB
Blockage due to line
voltage outside specifi
-
cations
-
It is reset when it returns to a specific
voltage.
OT
Blockage due to
overheating of the
power stages
-
It is reset when the temperature of
the power stages returns within the
specifications.
OC
Blockage due to motor
overload
-
One attempt every 10 minutes for a
total of 6 attempts.
-
One attempt every hour for a total of
24 attempts.
-
One attempt every 24 hours for a to
-
tal of 30 attempts.
Table 9: Self-reset of blockages
6.1.4 - “BP1” Blockage due to fault of the delivery pressure sensor
(system pressurisation)
If the device detects a fault in the delivery pressure sensor the pump re
-
mains blocked and the error signal “BP1” is given. This status begins
as soon as the problem is detected and ends automatically when correct
conditions have been restored.
6.1.5 - “BP2” Blockage due to fault of the suction pressure sensor
If the device detects a fault in the suction pressure sensor the pump re
-
mains blocked and the error signal “BP2” is given. This status begins as
soon as the problem is detected and ends automatically when correct con
-
ditions have been restored.
6.1.6 - “PB” Blockage due to supply voltage outside specifications
This occurs when the allowed line voltage at the supply terminal assumes
values outside the specifications. It is reset only automatically when the
voltage at the terminal returns within the allowed values.
6.1.7 - “SC” Blockage due to short circuit between the motor phases
The device is provided with protection against the direct short circuit which
may occur between the motor phases. When this blockage is indicated
you can attempt to restore operation by simultaneously holding down the +
and – keys, but this will not have any effect until 10 seconds have passed
since the moment the short circuit occurred.
6.2 - Manual reset of error conditions
In error status, the user can cancel the error by forcing a new attempt,
pressing and then releasing the + and – keys.
6.3 - Self-reset of error conditions
For some malfunctions and blockage conditions, the system attempts au
-
tomatic self-reset.
The auto self-reset procedure concerns in particular:
“BL”
Blockage due to water lack
“PB”
Blockage due to line voltage outside specifications
“OT”
Blockage due to overheating of the power stages
“OC”
Blockage due to motor overload
“BP”
Blockage due to fault of the pressure sensor
For example, if the system is blocked due to water lack, the device auto
-
