DAB PUMPS PWM 203, Instruction For Installation And Maintenance

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Alarm in fault log
Display message Description
PD Irregular shutdown
FA Problems with cooling system
Table 29: Alarms
Block conditions
Display message Description
BL Block due to water failure
BPx Block due to reading error of the pressure sensor named
LP Block due to low power supply voltage
HP Block due to high internal power supply voltage
OT Block due to overheating of final power stages
OB Block due to overheating of printed circuit
OC Block due to current overload on electric pump motor
OF Block due to current overload on final stages of output
SC Block due to direct short circuit between the phases on the output terminal
EC Block due to lack of rated current setting (RC)
Ei Block due to “i” internal error
Vi Block due to “I” internal voltage outside tolerance
Table 30: Block information
7.1 Description of blocks
7.1.1 “BL” Block due to water failure
In flow conditions below minimum value, with pressure lower than the set regulation value, a water failure signal is emitted and the
system shuts down the pump. The delay interval without pressure and flow can be set in the parameter TB of the TECHNICAL
ASSISTANCE menu. If the user inadvertently enters a pressure setpoint higher than the pressure that the electric pump can supply
on closure, the system indicates “block due to water failure” (BL) even if this is not precisely the problem. In this case, lower the
regulation pressure to a reasonable value, which does not normally exceed 2/3 of the head of the electrical pump installed. The
parameters SO: Dry running factor 6.5.14 and Minimum pressure pump stop due to water failure 6.5.15 enable the user to enter the
dry running protection activation thresholds.
If the parameters: SP, RC, SO and MP are not set correctly, the water failure protection will not function correctly.
7.1.2 “BPx” Block due to fault on pressure sensor
If the inverter detects a fault on the pressure sensor, the pump remains blocked and the error signal “BPx” is displayed. This status
starts as soon as the problem is detected and is reset automatically when the correct conditions are restored.
BP1 indicates an error on the sensor connected to press1, BP2 indicates an error on the sensor connected to press2,
BP3 indicates an error on the sensor connected to terminal board J5
7.1.3 "LP" Block due to low power supply voltage
Activated when the line voltage on the power supply terminal falls below the minimum admissible voltage of 295VAC. Reset is only
automatic when the voltage on the terminal exceeds 348VAC as per standard.
7.1.4 "HP" Block due to high internal power supply voltage
Activated when the internal power supply values are outside the specified range. Reset is only automatic when the voltage returns to
within the admissible values. This may be due to voltage surges or excessively brusque shutdown of the pump.
7.1.5 "SC" Block due to direct short circuit between the phases on the output terminal
The inverter is equipped with a protection against direct short circuits, which may occur between the phases U, V, and W of the
output terminal "PUMP". When this block signal is sent, the user can attempt reset by pressing b and – simultaneously
which in any event does not have any effect until 10 seconds has passed since the moment of the short circuit.