Danfoss VLT AHF 005 Programming Guide

22-26 Dry Pump Function
Select desired action for dry-pump operation.
Option: Function:
[0]
*
O
[1] Warning
NOTICE
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-ow 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] Innite 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 bypass’s 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.
Reset
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.
22-26 Dry Pump Function
Select desired action for dry-pump operation.
Option: Function:
[4] Stop and
Trip
22-27 Dry Pump Delay
Range: Function:
10 s* [0 - 600
s]
Denes for how long the dry-pump condition
must be active before activating a warning or
an alarm.
The frequency converter waits for the no-ow
delay time (22-24 No-Flow Delay) to expire
before the timer for the dry-pump delay starts.
3.20.2 22-3* No-ow Power Tuning
If not selecting Auto Set Up in parameter 22-20 Low Power
Auto Set-up, the tuning sequence is:
1. Close the main valve to stop
ow.
2. Run with motor until the system has reached
normal operating temperature.
3. Press [Hand On] and adjust speed for approxi-
mately 85% of rated speed. Note the exact speed.
4. Read power consumption either by looking for
actual power in the data line in the LCP or call
4a
Parameter 16-10 Power [kW]
or
4b
Parameter 16-11 Power [hp] in Main
Menu.
Note the power readout.
5. Change speed to approximately 50% of rated
speed. Note the exact speed.
6. Read power consumption either by looking for
actual power in the data line in the LCP or call
6a
Parameter 16-10 Power [kW]
or
6b
Parameter 16-11 Power [hp] in Main
Menu.
Note the power readout.
7. Programme 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].
8. Programme the associated power values in:
Parameter Descriptions
Programming Guide
MG11CE02 Danfoss A/S © 03/2015 All rights reserved. 163
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Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English