Danfoss VLT 6000 HVAC Manual de Serviço descarregar pdf (Página 111)

VLT

6000 HVAC

111MG.60.B1.02 - VLT is a registered Danfoss trade mark

★ = factory setting. ( ) = display text [ ] = value for use in communication via serial communication port

Programming

412 Trip delay overcurrent, I

LIM

(OVERLOAD DELAY)

Value:

0 - 60 sec. (61=OFF) ★ 60 sec.

Function:

When the frequency converter registers that the

output current has reached the current limit I

LIM

(parameter 215 Current limit) and stays there for the

duration selected, a cut-out will be performed.

Description of choice:

Select for how long the frequency converter is to be

able to keep up with the output current at the current

limit I

LIM

before it cuts out.

In OFF mode, parameter 412 Trip delay overcurrent,

LIM

is inactive, i.e. cut-outs are not performed.

408 Interference reduction method

(NOISE REDUCTION)

Value:

★ ASFM (ASFM) [0]

Fixed switching frequency

(FIXED SWITCHING FREQ.) [1]

LC filter fitted (LC-FILTER CONNECTED) [2]

Function:

Used to select different methods for reducing the

amount of acoustic interference from the motor.

Description of choice:

ASFM [0] guarantees that the maximum switching

frequency is used at all times without derating of the

VLT frequency converter. This is done by monitoring

the load.

Fixed switching frequency [1] makes it possible to set

a fixed high/low switching frequency. This can

generate the best result, as the switching frequency

can be set to lie outside the motor interference or in a

less irritating area. The switching frequency is

adjusted in parameter 407 Switching frequency. LC-

filter fitted [2] is to be used if an LC-filter is fitted

between the VLT frequency converter and the motor,

as the VLT frequency converter will otherwise not be

able to protect the LC-filter.

409 Function in case of no load

(FUNCT. LOW CURR.)

Value:

Trip (TRIP) [0]

★ Warning (WARNING) [1]

Function:

This parameter can be used e.g. for monitoring the V-

belt of a fan to make sure it has not snapped. This

function is activated when the output current goes

below parameter 221 Warning: Low current.

Description of choice:

In the case of a Trip [1], the VLT frequency converter

will stop the motor.

If Warning [2] is selected, the VLT frequency converter

will give a warning if the output current drops below

the threshold value in parameter 221 Warning: Low

current, I

LOW

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 176 177

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