ABB ACQ80, Firmware Manual

Page: 51 / 390

Program features 51
 Time scheduled pump cleaning
Time scheduled pump cleaning allows you to clean the pump at the desired
time. When the time scheduled pump cleaning is enabled and the present time
is equal to the user mentioned time, the normal operation stops and the pump
cleaning starts automatically.
You can enter a maximum of five different times of a day in the parameters
83.41 Pump cleaning time 1
....
83.45 Pump cleaning time 5
and schedule the pump
cleaning. Setting the time in ascending order or descending order is not
mandatory and you can set any time as per your need. Cleaning is activated only
if the drive start command is already active i.e. drive is in running state.
If drive is not running at the defined time, the drive skips the cleaning schedule
of that particular time. If a pump cleaning operation is ongoing and any of the
remaining defined time matches the present time, the cleaning operation does
not stop and ignores the pump cleaning trigger. After the pump cleaning, the
normal pump operation starts.
Notes:
• A warning
A6A7 System time not set
is generated, if the system time is not set
properly and time scheduled pump is activated.
• If
83.10 Pump cleaning action
=
Warning only
and the time scheduled pump
cleaning is running based on the set time, the drive does not generate the
warning
D507 Pump cleaning needed
.
Settings
Parameter group
83 Pump cleaning
(page
242
).
 Dry run protection
The dry run protection function automatically detects and avoids running of a
pump with no flow of water in the pump. The dry run protection can be
activated through one of the following methods:
• Using DI
• Using minimum load current
Dry run protection using DI
The dry run protection using DI (
82.02 Dry run source
= any DI), detects the dry
run condition of the pump based on the digital signals received from the
sensors. The drive trips on fault
D4B0 Running dry
whenever the sensor detects
the dry run condition and sends the digital input value true to the drive.