Version 2.02 15.05.2007
Function of VS 3000
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-Runtimeequalization
When the entry is set to Y, the fan control sequence is changed. Fans are then not loaded and unloaded in
sequence but according to running time. When a fan needs to be loaded, the fan then having the shortest run
time will be started. When a fan needs to be unloaded, the fan then having the longest run time will be
stopped.
Fan base load rotation is also effective in this operating mode. When the HP controller remains in the neutral
zone for the definable CycletimeF.(Menu 3-7), the fan then having the shortest run time will be started - if
available - and the fan having the longest run time will be stopped.
2. CycletimeF.
A value can be entered to determine the time after which either fan actuation or base load rotation will take
place as a function of the modes described above.
3.30 Monitoring condenser fan motors
Step control:
Digital inputs are provided for monitoring of condenser fan motors. When the floating contact of the motor over-
load cutout opens, the corresponding fan output is reset and a fault report is logged in fault memory. Alarm for-
warding takes place according to the preselected priority. When the contact is closed, the fan is enabled for con-
trol. Some types of system require the fan output to remain activated after actuation o f the motor overload
cutout. Resetting of the fan output can therefore be deactivated by parameter setting.
Speed control:
Digital inputs are provided for monitoring of condenser fan motors. When the floating contact of the motor over-
load cutout opens, a fault report is logged in fault memory for the fan motor concerned. Alarm forwarding takes
place according to the preselected priority. The number of fans to be monitored is defined by the parameter No.
cond. stages (Menu 3-1) for variable-speed fans. Two stages are always used for control.
Combined controller:
Digital inputs are provided for monitoring of condenser fan motors. When the floating contact of the motor over-
load cutout opens, the corresponding fan output is reset and a fault report is logged in fault memory.
Alarm forwarding takes place according to the preselec ted p riority. When the contact is closed, the fan is en-
abled for control. Some types of system require the fan output to remain activated after actuation of the motor
overload cutout. Resetting of the fan output can therefore be deactivated by parameter setting.
Motorschutz Stufe 1 überwacht die am Drehzahlsteller angeschlossenen Lüfter. In der Betriebsart Kombirege -
lung parallel wird bei Ansprechen des Motorschutzschalters der Lüfterstufe 1 der Lüfterausgang 1 nicht
zurückgesetzt, da dies alle Lüfter deaktivieren würde. Es wird lediglich eine Störmeldung ausgegeben. Maximal
können folgende Anzahl Lüfterstufen überwacht werden:
- VS 3000 basic configuration: 3 fan stages
- One SIOX extension module added: 7 fan stages
- Two SIOX extension modules added: 11 fan stages
The fault output for the speed adjuster/frequency changer can be monitored through the input for the fan motor
overload cutout of stage No.Cond.Stages +1.
When no voltage is applied to this input (fault on speed adjuster), Fan Output 1 is reset to enable the speed ad-
juster and in its place the relay output for fan stage No.Cond.Stages + 1 is activated to allow emergency oper-
ation.
Applicable to parallel combined controller only: With condenser combined control it is essential to
make sure that the output is used for power line bypass. Cooling is no longer assured in frequency
changer fault conditions.
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