Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 151

Parameter Description
22-26 Dry Pump Function
Select the action for dry-pump operation.
Option: Function:
[0] Off
*
NOTICE
[1] Warning
To use dry-pump detection:
1. Enable low-power detection in
parameter 22-21 Low Power
Detection.
2. Commission low-power detection
using either parameter group
22-3* No-flow Power Tuning No
Flow Power Tuning, or
parameter 22-20 Low Power Auto
Set-up.
NOTICE
Do not set parameter 14-20 Reset Mode to
[13] Infinite auto reset, when
parameter 22-26 Dry Pump Function is set
to [2] Alarm. Doing so causes the
frequency converter to continuously cycle
between running and stopping when a
dry-pump condition is detected.
NOTICE
For frequency converters with constant-
speed bypass
If an automatic bypass function starts the
bypass at persistent alarm conditions,
disable the automatic bypass function, if
[2] Alarm or [3] Man. Reset Alarm is
selected as the dry-pump function.
The frequency converter continues to run, but
activates a dry-pump warning (warning 93, Dry
pump). A frequency converter digital output or a
serial communication bus can communicate a
warning to other equipment.
[2] Alarm The frequency converter stops running and
activates a dry-pump alarm (alarm 93, Dry
pump). A frequency converter digital output or a
serial communication bus can communicate an
alarm to other equipment.
[3] Man. The frequency converter stops running and
Reset activates a dry-pump alarm (alarm 93, Dry
Alarm pump). A frequency converter digital output or a
serial communication bus can communicate an
alarm to other equipment.
[4] Stop and
Trip
MG16H202
Programming Guide
22-27 Dry Pump Delay
Range:
10 s
*
600 s]
3.18.3 22-3* No-flow Power Tuning
If auto set-up is disabled in parameter 22-20 Low Power
Auto Set-up, the tuning sequence is:
NOTICE
Set parameter 1-03 Torque Characteristics before tuning
takes place.
1.
2.
3.
4.
5.
6.
7.
8.
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Function:
[0 - Defines for how long the dry-pump condition
must be active before activating a warning or an
alarm.
The frequency converter waits for the no-flow
delay time (parameter 22-24 No-Flow Delay) to
expire before the timer for the dry-pump delay
starts.
Close the main valve to stop flow.
Run with motor until the system has reached
normal operating temperature.
Press [Hand On] and adjust speed for approxi-
mately 85% of rated speed. Note the exact speed.
Read power consumption either by looking for
actual power in the data line in the LCP or by
viewing 1 of the following parameters:
4a Parameter 16-10 Power [kW].
or
4b Parameter 16-11 Power [hp] in the Main
Menu.
Note the power readout.
Change speed to approximately 50% of rated
speed. Note the exact speed.
Read power consumption either by looking for
actual power in the data line in the LCP or by
viewing 1 of the following parameters:
6a Parameter 16-10 Power [kW].
or
6b Parameter 16-11 Power [hp] in the Main
Menu.
Note the power readout.
Program the speeds used in:
7a Parameter 22-32 Low Speed [RPM].
7b Parameter 22-33 Low Speed [Hz].
7c Parameter 22-36 High Speed [RPM].
7d Parameter 22-37 High Speed [Hz].
Program the associated power values in:
3 3
149