12.9.10 Pump Protection Function
Two modes of pump protection are available:
●
Pump dry protection: Protecting the pump from running without water load
(e.g., water pump without water)
●
Pump leakage protection: Protecting the pump from running with leakage
Both protection modes are realized by comparing the PID feedback with the PID
reference when the frequency converter is running at [E0.09] 'Output frequency
high limit'.
Code
Name
Setting range
Default
Min.
Attri.
E5.05 Pump dry protection threshold
0.0 %… [E5.08]
30.0
0.1
Run
E5.06 Pump dry protection delay
0.0…300.0 s
(0.0 s: Inactive)
0.0
0.1
Run
E5.07 Pump dry protection delay at start-up
0.0…300.0 s
30.0
0.1
Run
E5.08 Pump leakage protection threshold
0.0…100.0 %
50.0
0.1
Run
E5.09 Pump leakage protection delay
0.0…600.0 s
(0.0 s: Inactive)
0.0
0.1
Run
E5.10 Pump leakage protection delay at start-up
0.0…600.0 s
60.0
0.1
Run
E9.05 Last error type
24: Pdr, pump dry
0
–
Read
E9.06 Second last error type
0
–
Read
E9.07 Third last error type
0
–
Read
The conditions to trigger the pump dry protection:
●
Frequency converter runs at the [E0.09] 'Output frequency high limit'
●
([PID feedback] ÷ [PID reference]) < [E5.05] 'Pump dry protection threshold'
●
Duration ≥ [E5.06] 'Pump dry protection delay'
When the pump dry protection is triggered, the error code 'Pdr' will be displayed
on the operating panel. The error message '24: Pdr, pump dry' can be read via
parameters E9.05...E9.07.
The conditions to trigger the pump leakage protection:
●
Frequency converter runs at the [E0.09] 'Output frequency high limit'
●
([PID feedback] ÷ [PID reference]) < [E5.08] 'Pump leakage protection thresh-
old'
●
Duration ≥ [E5.09] 'Pump leakage protection delay'
When the pump leakage protection is triggered, the warning code 'PLE' will be
displayed on the operating panel.
Bosch Rexroth AG
Functions and Parameters
VFC 3210
148/253
DOK-RCON04-VFC3210****-IT01-EN-P