Danfoss VLT Programming Guide

25-81 Pump Status
Range: Function:
0 N/A* [0 - 0 N/A] Pump Status shows the status for the number of pumps selected in par. 25-06 Number of Pumps .
It is a readout of the status for each of the pumps showing a string, which consists of pump number
and the current status of the pump.
Example: Readout is with the abbreviation like “1:D 2:O” This means that pump 1 is running and
speed controlled by the frequency converter and pump 2 is stopped.
25-82 Lead Pump
Range: Function:
0 N/A* [Application dependant] Readout parameter for the actual variable speed pump in the system. The Lead Pump parameter is
updated to reflect the current variable speed pump in the system when an alternation takes place.
If no lead pump is selected (Cascade Controller disabled or all pumps interlocked) the display will
show NONE.
25-83 Relay Status
Array [2]
Range: Function:
0 N/A* [0 - 0 N/A] Read out of the status for each of the relays assigned to control the pumps. Every element in the
array represents a relay. If a relay is activated, the corresponding element is set to “On”. If a relay
is deactivated, the corresponding element is set to “Off”.
25-84 Pump ON Time
Array [2]
Range: Function:
0 h* [0 - 2147483647 h] Readout of the value for Pump ON Time. The Cascade Controller has separate counters for the
pumps and for the relays that control the pumps. Pump ON Time monitors the “operating hours” of
each pump. The value of each Pump ON Time counter can be reset to 0 by writing in the parameter,
e.g. if the pump is replaced in case of service.
25-85 Relay ON Time
Array [2]
Range: Function:
0 h* [0 - 2147483647 h] Readout of the value for Relay ON time. The Cascade Controller has separate counters for the pumps
and for the relays that control the pumps. Pump cycling is always done based on the relay counters,
otherwise it would always use the new pump if a pump is replaced and its value in par. 25-84
Pump
ON Time
is reset. In order to use par. 25-04 Pump Cycling the Cascade Controller is monitoring the
Relay ON time.
25-86 Reset Relay Counters
Option: Function:
Resets all elements in par. 25-85 Relay ON Time counters.
[0] * Do not reset
[1] Do reset
3.23.7 25-9* Service
Parameters used in case of service on one or more of the pumps controlled.
3 Parameter Description VLT
®
HVAC Drive Programming Guide
252 MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
3

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)