Protection Systems; Table 29: Alarms; Table 30: Block Information - DWT WaCS PWM Serie Instrucciones De Instalación Y Mantenimiento

7. PROTECTION SYSTEMS

The inverter is equipped with protection systems designed to preserve the pump, motor, power line and the
inverter itself. When one or more protections trip, the one with the highest priority is shown on display.
Depending on the type of error, the electric pump may shut down, but when normal conditions are restored,
the error state may clear automatically, immediately or after a set time interval following automatic reset.
In the case of a block due to water supply failure (BL), block due to pump motor current overload (OC), block
due to final output stage current overload (OF), block due to direct short circuit between the phases on the
output terminal (SC), the user can attempt to manually reset the error condition by pressing and releasing
buttons + and - simultaneously. If the error condition persists, the cause of the fault must be located and
eliminated.
Display message
PD
FA
Display message
BL
BPx
LP
HP
OT
OB
OC
OF
SC
EC
Ei
Vi
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.
Alarm in fault log
Irregular shutdown
Problems with cooling system

Table 29: Alarms

Block due to water failure
Block due to reading error of the pressure sensor named
Block due to low power supply voltage
Block due to high internal power supply voltage
Block due to overheating of final power stages
Block due to overheating of printed circuit
Block due to current overload on electric pump motor
Block due to current overload on final stages of output
Block due to direct short circuit between the phases on the output terminal
Block due to lack of rated current setting (RC)
Block due to "i" internal error
Block due to "I" internal voltage outside tolerance

Table 30: Block information

ENGLISH
Description
Block conditions
Description
126