DAB PUMPS PWM 203, Instruction For Installation And Maintenance

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7.2 Manual reset of error conditions
In error status, the user can reset the fault by overriding a new attempt by pressing and releasing b and -.
7.3 Auto-reset of error conditions
In the cases of some malfunctions and block conditions, the system makes a number of attempts at automatic reset of the electric
pump. The auto-reset system regards in particular:
- "BL" Block due to water failure
- "LP" Block due to low power supply voltage
- "HP" Block due to internal high 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
- "BP" Block due to fault on pressure sensor
If, for example, the pump is blocked due to water supply failure, the inverter automatically starts a test procedure to verify that the
unit is effectively without water permanently. During the sequence of operations, if a reset attempt succeeds (for example water has
returned), the procedure is interrupted and normal operation is resumed.
Table 31 shows the sequence of operations performed by the inverter for the different types of block.
Automatic reset of error conditions
Display message Description Automatic reset sequence
BL Block due to water failure
- 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 total of 30 attempts
LP Block due to low line voltage - Reset when specified voltage is restored
HP
Block due to high internal power
supply voltage
- Reset when voltage returns to a specified value
OT
Block due to overheating of final
power stages
(TE > 100°C)
- Reset when temperature of final power stages falls below 85°C
OB
Block due to overheating of printed
circuit
(BT> 120°C)
- Reset when temperature of printed circuit falls below 100°C
OC
Block due to current overload on
electric pump motor
- An attempt every 10 minutes for a total of 6 attempts
- An attempt every hour for a total of 24 attempts
- An attempt every 24 hours for a total of 30 attempts
OF
Block due to current overload on
final stages of output
- An attempt every 10 minutes for a total of 6 attempts
- An attempt every hour for a total of 24 attempts
- - An attempt every 24 hours for a total of 30 attempts
Table 31: Auto-reset of blocks