YASKAWA VS-505WII Manual de usuario

Varispeed-50

)W11

INDUSTRIAL

USETHYRISTOR

CONVERTER

UNITS

Before

initial

operation,

read

these

instructions

thoroughly,

and

retain

for

future

reference

When

properly

installed,

operated

and

maintained,

this

unit

will

provide

lifetime

optimum

operation

mandatory

that

the

person

who

operates, inspects,

and

maintains

this

equipment

thoroughly

reads

and

understands

this

manual

and has

his possession

all

time

IMPORTANT

Make

withstand

voltage

test

the

VS-505WII

because

incorporates

semi-conductor

electronic

circuits

insulation resistance

tests

are

neccessary,

make

them

only

accordance

with the

instructions

given

this

manual

682-215

Type

CDMR-W11



Type

CDMR-WIL

(Type



(Type

460

105



460

420

CONTENTS

682-234

not

tamper

with

potentiometers

the

power

units

since

they

were

preset

at the

factory

before

shipment

Varispeed-505W11

(VS-505WII)

thyristor

converter

unit

for

varispeed

reversible

operation

of industrial

motors

For

correct

operation

VS-505WII,

users

must

thoroughly read these

instructions

This

manual

also

necessary

for

maintenance

and

troubleshooting,

and

threfore

should

be kept

filed

for

ready

reference

For

details

motors,

refer

"Instructions

for

Industrial

Motors"

(TOE-C435-3B)

Type

CDMR-W11

(Type

230

260

682-227

RECEIVING

. . . .

Interconnections

MAINTENANCE

. . . . . . . .

STORAGE

. . .

Cautions

when

Wiring

. . . . . .

Periodic

Inspection

. . . . . .

LOCATION

. . .

TEST

RUN

Parts

Replacement

. .

INSTALLATION

3Check

before

Test

Cautions

Replacing

WIRING

. . . . .

Run

.. . . . . .

. . . . . . .

. .

Control

Board

. . . . . . . . .

Component

Arrangement

No-Load

Operation

Troubleshooting

Guide

VS-505WH

. . . . . . . . .

Full-Load Operation

. . . . -

SPAREPARTS

. .

. . . . .

Terminal

Sizes

and

Carrying

Currents

. . .

Adjustment

. . .

REFERENCE

. .

RECEIVING

missing

STORAGE

the

equipment

temporarily

stored

ma-

chine stops

for

extended

length

time,

the

following

precautions

should

taken

LOCATION

Store

the

equipment

under

the

following

condi-

tions

Free

from

rainfall

and

drops

water

Clean

and dry

(a)

Control

Circuit

Free from

corrosive

gas

and

liquid

Ambient

temperature

OOC

WIRII4G

Make

wiring

reference

the

interconnection

diagram

furnished

on your

order

and

the

follow-

ing

COMPONENT

ARRANGEMENT

VS-505

Figs

show

component

arrangement

the

VS-505WII

NAMEPLATE

"CAUTIONS

NOPERA-

TION"

CONTROL

SUPPLY

VOLTAGE

SELECTOR

TAP

POWER

CIRCUIT

BOARD

(2PCB)

(a)

Control

Circuit

Fig

Type

CDMR-WI[,

-S,

(460

115

(b)

Main

Circuit

CONTROL

CIRCUIT

BOARD

(1PCB)



THYRISTOR

CONNECTOR



POWER

CIRCUIT

COOLING

BOARD

(2PCB)



FAN

MAIN

CIRCUIT

EXTERNAL

TERMINAL

(b)

Main

Circuit

Fig

Type

CDMR-WII,

-1V[

(230

260 A)

THYRISTOR

PROTECTIVE

FUSE

FOR

220

CLASS,

FOR

440

VCLASS)

THYRISTOR

PROTECTIVE

FUSE

FOR

220

CLASS,

FOR

440

CLASS)

The

equipment

has

been

put

through

severe

tests

the

factory

before

shipped

After

un-

packing,

however,

check

and

see the

following

Less

vibration

INSTALLATION

Its

nameplate

data

meets

your

requirements

has

sustained

damage

while

transit

Select

location

described

STORAGE

and

in-

Fastening

bolts

and

screws are

not

loosened

stall

the

equipment

by proper

procedure

keep-

Devices

built

the cabinet are not

damaged

ing the

equipment

good

working

condition

WIRING

(Cont'd)

TERMINAL

SIZES

AND

CARRYING

CURRENTS

Table

shows

the

size

and

the current

earring

capacities

the

terminals

VS-505WII

Select

leads

with

sufficient

current

carrying capacity

Refer

"Cautions

when

Wiring"

Table

Terminal

Size

and

Current

Capacity

Notes

Terminal

size

other

than

listed

above

and

current

capacity

below

Rule

thumb

main

circuit

power

capacity

.2XF

XEXI

(VA)



Supply

voltage



main

circuit

current

SURGE

ABSORBERS

Control

Circuit



(b)

Power

Circuit

Fig

Type

CDMR-WII

-L

(460

420

INTERCONNECTIONS

Make

connections

VS-505WII

with

associate

units

according

the

interconnection

diagram

separately

furnished

CAUTIONS

WHEN

WIRING

Main

Circuits

Use

600

PVC

insulated

wires

cabtyre

cables

with

the

current

carrying

capacities

the

com-

bined

motor

for

main

circuit

terminals

(U,

V, W)

and

main

circuit

terminals

(P,

Field

Circuits

Signal

Circuits

MAIN

CIRCUIT

EXTERNAL

TERMINALS

Use

600

PVC

insulated

wires

cabtyre

cables

with

the

current

carrying

capacities

the

com-

bined

motor

for

field

power

circuit

terminals

(Uo,

Wl)

and

field

circuit

terminals

(J,



Use

stranded

wires

cross-section

5.5

or larger

for

field

circuit

terminals

(J,

Use

shielded

wires

twisted

wires

twisting

pitches

smaller

for

the

speed

setting

circuit

terminals

(6 to 10)

speed

feedback

ter-

minals

(2,

3),

tachometer

circuit

terminals

(50

52)

Fig

Pitch

Twisted

Wire

Main

Field

CDMR-W11

Circuit Circuit Circuit

Car- Car- Car-

RatedRated

Ter

ryingTer- ryingTer-rying

Volt-

Out-

minal

Cur-

minal

Cur-

minal

Cur-

age

put

rent

Size rent

Size

rent

A A

5 25

230 105

105

180

M10

147

M10

180

260

M10

213

M10

260

420

M12

343

M12

420

550

-M12

449

M12

.550

105

'M8

105

460 180

M10

147

M10

180

260

M10

213

M10

2&0

420

M12

343

M12

420

550

M12

449

M12

550

Separation

Signal

Cables

from Main

Circuit

Cables

avoid

inductive

interference

from

other

cables,

run

the

shieldedor

twisted

wires

55)

separatefrommain

circuit

cables

(

;

U1,

;

bundle

thru

duct

CAUTION

After

wiring,

check

interconnections

Make

in-

sulation

resistance

tests

using

500

megger

Connect

VS-505WIE

main

circuit

terminals

(U,

;



;



U1,

;

with

common

lead

Measure

the

insulation

resistance

between

common

lead

and

the

ground

When

the

test

result

2MSZ

more,

means

that wiring

good

TEST

RUN

When

the

VS-505WIL

has

been

correctly

installed

and

wired,

the

unit shall

tested

through

test

run

follows

trouble

foundduring

the

test

run,

re-

fer

"Check

Before

Test

Run"

and

"Trouble-

shooting

Guide"

for

necessary

measures

the

cause

the

trouble

cannot

located,

repair

impossible,

notify

our

service

station,

giving

the

details

trouble

conditions

CHECK

BEFORE

TEST

RUN

Make

the

following

checks

prior

the

test

run

Table

Check

before

Test

Run

VS-

505WE

larger

capacity

than

230

460

are

provided

with

thyristor

cooling

fan

Fig

Inspection

Window

Motor

Fig

Tap

Selection

Control

Supply

Voltage

Table

Supply

Voltage

Allowable

Range

50H

60Hz

For

Hz,

slide

the

switch

key

For

Hz,

slide

the switch

key

down

Fig

Power

Frequency

Selector

Switch

Check

Pomts Check

Items

Interconnec-

Correct

wiring

tions

between

Tightening

terminal

screws

505WE

and

Associ-

ate

Units

Motor

Disconnection

from

the

driven

machine

Removal

thrust

block

Remove

inspection

covers

and

blow

out

with

air to

clean

commutator

(Fig

VS-505WII

Adhesion

dirt

dust

the

enclosure

Smooth

hand

rotation

thyristor

cooling

fan

Check

items

"Cautions

Operation"

the

back

the

control

board

door

Correct

connection

the

shunt

connector

the

voltage

selecting

tap

(Fig

Correct

setting

the

frequency

selector

switch

(Fig

Correct

adjustment

potentiometers

the

control

board

(1PCB)

Refer

red

paint

Supply

Volt-

Voltages

anytwo

phases

U, V,

are

age

Input

within

the

values

Table

Check

with

Terminals

tester

VS-505WR

Terminals

and

are

connected

Rotating

direction

the

motor

blower

meets

with

the

arrow

marked

the

blower

Nominal

Supply

Permissible

Voltage

Supply

Frequency

Voltage

Selector

Voltage

Variation

Tap

200

50/60

170

220

200

220

50/60

187

242

220

400

50/60

340

440

400

440

50/60

374

484

440

TEST

RUN



(Cont'd

)

NO-LOAD

OPERATION

After

making

the

checks

specified

before

test

run,

thoroughly

check

the

environment

of the

system

for

safety

Check

the

polarity

tachometer

generator

feedback

voltage

When

the

motor

running

forward,

the

polarity of

VS-505WIl

signal

terminal



minus

and

plus during

reverse

running

the

motor

Then,

run

the

motor

without

load

according

Table

FULL-LOAD

OPERATION

Before

starting

full-load

operation,

stop

the

power

supply,

couple

the

motor

the

driven

machine,

and

check

the

motor

and

the

driven

machine

for

safe

and

obstruction-free

conditions

Table

gives

full-load

operation

procedure

Table

No-load

Operation

VS-505W11

rated

220

and

above

and460

and

above

are

provided

with a

thyrlstor

cooling

fan

ADJUSTMENT

not

tamper

unnecessarily

with the

potentiometers

the

control

circuit

board

since

they

have been

adjusted

the

factory

before

shipped

Adjuster

Locations

and

Functions

Adjuster

locations

the control

circuit

board

and

functions

are

shown

rig

and

Table

The

characteristics

control

circuit

board

check

terminals

are

shown

:Fig

and

Table

Fig

Adjuster

Locations

Control

Circuit

Board

'fable 5

Full-load

Operation

Order

Operation

Check

Items

Set

the

speed

reference

zero

Turn

on main

circuit

Smooth

rotation

the

powersuppy

thyristor

cooling

fan

Smooth

rotation

the

blower

for

motor

Rotating

direction

the

blower

meets

with

the

mark-

ing

the

blower

Make

operationalse-

Indication

light

"PREP"

quence

and

check

the

control

board(1PCB)

sure

that

operation

turns

ready

(Turn

ready

signal,

motor

cooling

fan

/OFF

signal

Turn-on

the

operation

signal

Gradually,

increasethe

Smooth

acceleration

speed

setting

value

motor

abnormalodor,

smoke,

vibration

and

noise

motor

6Remove

the

hand-hole

brush

chattering

and

cover

and

check

the

sparking

thebrushes

commutator

avoid

excessive

temperature

rise

motor

winding

frame

112, 132,

reclose

the

window

within

minutes

Gradually,turn

the

Smooth

acceleration

speed

setting

potentiom-

motor

eter

clockwise

Increase

the

speed

set-

motor

rotates

the

ting

value

the

maxi-

maximum

speed

Check

mum

with

speedometer

9 Change

the

speed

motorspeed

corre-

various

values

sponds

with

the

set

values

Turn

off

the

operation

motor

suddenly

stops

signal

Turn

off

the

main

cir-

cult

power

supply

Order

Operation

the

speed

zero

Turn

main

circ

power

supply

Turn

operation

signal

and

gradually

increase

the

speed

Check

sure

that

the

motor

and

driven

machine

are

correctly

nning

off

the

ope

ati

sig

circuit

power

supply

Table

Control

Circuit

Board

Adjuster

Locations

and

Functions

Type

Adjuster

Function

Adjusting

Method

Specifications

Adjusters

Location

Name

RATE

Accel

time

adjustment

fwdrun

Clockwise

rotation

increases

sec

(Decel

time

adjustment

rvs

run

accel

time

RATE

Decel

time

adjustment

fwd run

Clockwise

rotation

increases

decel

time

3-75

sec

(Accel

time

adjus

tment

rvs

run

NGAIN

ASR

Gain

adjustment

Clockwise

rotation

increases

GAIN

Speed

feedback

adjustment

Clockwise

rotation

decreases

V/10046 specA

NMAX

geed

IGAIN

ACR

Gain adjustment

Clockwise

rotation

increases

gain

Main

circuit

current

feedback

Clockwise

rotation

decreases

V/100%

current

IFB

adjustment

current

LIMIT

Speed and

current

limit

value

Clockwise

rotation

increases

150%

(Standard)

forward

run

limit

value

LIMIT

Speed

and

current

limit

value

Clockwise

rotation

increases

150%

(Standard)

reverse

run

mit

alue

CEMF

Counter

electromotive

force

Clockwise

rotation

increases

17 -

.84

times

Potenti-

compensation

gain

ometers

Speedometer

adjustment

Clockwise

rotation

increases

mADC

max

.pointer

swin

Ammeter

adjustment

Clockwise

rotation

increases pointer

mADC

max

swing

NOFS

ASR

offset

adjustment

evolt

z- e

IOFS

ACR

offset

adjustment

t-volta

,",

.-e

KIPP

Phase

shift

lag

limit

adjust-

Clockwise

rotation

advances

shift

lag

155oek

Standard

ment

limit

Adjustment

phase

shifter

Clockwise

rotation

advances

90'-k

li_T1i°eZ

PSB

operation

point

hase

(Adjustable)

Setting

overload

detection

Clockwise

rotation

increases

110%

Standard

OL%

start

point

overload

detection

start

oin

OLT

Setting

overload

detection

Clockwise

rotation

increases

150%,

sec

(Standard)

time

.eration

time

ZCD

Setting

zero

current

detec-

Clockwise

rotation

increases

0% -

10n

(Adjustable)

tion

level

detection

level

(Standard)

IREF

Setting

field

current

Clockwise

rotation

increases

field

current

Resistor

14FBR

1FBR

Rough

adjustment

field

cur-

Selection

rent

detection

voltage

level

Open

the

resistor

according

Refer

motor

specifi-

(Open)

5FBR

Rough

adjustment

main

circuit

specifications

cations

9FBR

current

detection

voltage

level

Slide

1SW

Control

Method

selector

(Speed

N-1

Current

Switch

control)

M®

Hz-

Rough

adjustment

speed

Selection

the

voltage

level

detection

voltage

level

according

type

tack-gen

and

motor

rated

eed

Selection

of soft start

operation

Soft

start

Selection

of PI or

control

ACR

control

method

contr

Selection

of PI or

control

mntrol

Plug

ASR

control

method

P1 control

control

Selection

zero-speed

condi-

J 1

block

after

motor

28 tion at

motor

overheat

reached

zero

speed

stop

.eration

ime(giate

gate

block

Selection

start

interlock

©Wit

zero-speed

condition

Without

Selection

zero-speed

cord-

Field

half-reduced

after

tion at

motor

blower

stop

ttiotor

zero-speed

stop

_operation

(Gate

block)

Field

half-reduced

immediately

(Gate

block)

Selection

exciter

according

I©Exciter

used

typeof

motor

field

Exciter

not

used

Open

Speed

control

voltage

detection

Speed

control

Short-

OPN

tach-gen

circuit

Short

Jumper

circuited

other

than the

above

Open

Special

application

OPS

Short-

Other

than

the

above

circuited

TEST

RUN

(Cont'd)



Adjustment

Procedure

Fig

Control

Circuit

Check

Terminals

MAX

(Speed

feedback adjustment)

Table

Control

Board

Check

Terminals

adjust

the

motor

speed

exactly

the

reference

speed,

proceed

follows

Prepare

the

tachometer

having

the

required

accuracy

Operate

the

motor

load

(or

less

variation)

Measure

the

speed

reference

voltage

with

voltmeter

Correct

the

voltage

that of

desired

motor

speed

Measure

the

motor

speed

with

tachometer

the

speed

does

not

reach

the

desired

speed,

turn

NMAX

counterclockwise

increase

the

speed

Signal

Name

Check

Terminals

Normal

Value

CH22

(SG

)

Stable

power

supply

CH24

+15

CH25

-15

CH19

+24

CH20

-24

Allowable

voltage

Unstable

power

supply

CH23

+24

(Pulse

amplifier

supply)

function

range

±20%

CH4

V/100%

com

mand

Forward,

Reverse)

Speed

reference

CH5

±6

V/100%

com

mand

((D

Forward,

(DReverse)

Speed

feedback

CH3

100%

spe

Forward,

Reverse)

Forward

CH9

Current

command

Reverse

CH8

-3

V/100%

command

Current

limit

Forward

CH7

V/100%

current

limit

(Speed

limit)

Reverse

CH6

(+6

V/100%

speed

limit)

Main

Current

feedback

CH18

+3 VI100%

current

Circuit

Power

Current

limiter

output

CH2

-1

gate

ock

Approx

0 t

when

controlling

Phase

shifter

input

CH16

Approx

Hz,

gate

block

at 60

Hz,

at 50

when

controlling

Counter

electromotive

force

input

CH1

0 - ±5

Overload

detection

start

point

CH21

110%

(Approx

-1

.65

Zero-current

detection

CH15

load

current

conduction,

approx

+12

load

current

Pulse

amplifier

power Forward

C1112

reverse

opera-

tion

Approx

+24

forward

operation

supply

Reverse

CH13

fozwaz~d

opera-

tion

Approx

+24

reverse

operation

Gate

block

(at failure)

CH14

normal,

!pprox

-12

gate

bloc

Phase

shifter

synchronization

4/_~s

U, V,

Main

circuit

power

supply

input

power

supply

Current

command

CH11

Voltage

according

-6

V/5

Field

Current

feedback

CH17

field

current

V/5

Power Phase

shifter

input

CH10

Approx

Hz,

field

block

+1 to +5

Hz,

+1 to

at 50

when

controlling

the

speed

exceeds

the

desired

speed,

turn

NMAX

clockwise

decrease

the

speed

FLIMIT

(Forward

limit

value

adjustment)

RLIMIT

(Reverse

limit

value

adjustment)

Current

limitation

(Speed

control)

Slide

the

control

method

selector

switch

(1SW)

the

control

circuit

board

When

the voltages

CH7

(forward)

and

CH6

(reverse) are

100%

current

limit

value

obtained

Current

limit

value

can

set

within

the

range

250%

LIMIT

and

LIMIT

Speed

limitation

(Current

control)

Slide

the

control

method

selector

switch

(1SW)

the

control

circuit

board

When

the

voltages

(forward)

and

(reverse)

are

100%

speed

limit

value

obtained

Speed

limit

value

can

set

within the

range

250%

LIMIT

and

LIMIT

PSB

(Phase

shifter

operating point

adjustment)

PSB

sets

the

phase

shifter

operating

point

When

the

current

controller

(ACR)

inte-

gral-controlled

Connect

the

plug

selector

the

control

circuit

board

Turn

PSB

fully

counterclockwise

When

the

current

controller

(ACR)

ratio-

controlled

Connect

the

plug

selector

the

control

circuit

board

Turn

PSB

clockwise gradually

with

reference

current

at 0

and

set

the

position

where

main

circuit

current

ready

start

CEMF

(Counter

electromotive force

compensation)

Current

loop

vulnerable

counter

electro-

motive

force

order

obtain

optimum

per-

formance,

compensating

electromotive

force

has

biased

the

phase

shifter,

depending

the control

mode

When

the

current

controller

(ACR)

ratio-

controlled

Adjust

CEMF,

observing

the

motor

acceleration

current with

synchroscope

Turn

CEMF

fully

counterclockwise,

and

turn

CEMF

clockwise

gradually

until

optimum

value

shown

Fig

obtained

When

the

current

controller

(ACR)

inte-

gral-controlled

MOTOR

ACCELERATION

CUR

1tENT

Field

Current

Adjustment

Fig

CEMF

Adjustment

CEMF

compensation

reduces

the

loss

time

due

Forward/Reverse

selection

as the

same

level

the

integral

control

ACR

Turn

CEMF

fully

counterclockwise,

and

during

motor

acceleration

current

limit

gradually

turn

clockwise

until

the voltage

CH2

the

control

circuit

board

stabilizes

Field

current

adjustment

required

for

checking

the

setting

the factory or

for

fine

adjustment

change

the

setting,

selection

resistors

(1FB

4FB

the

control

circuit

board

required

For

constant

field

current

Connect

ammeter

the

field

circuit

Adjust

that

the

ammeter

indicates

the

rated

field

current with

IREF

the

control

circuit

board

(Refer

the

test

report

nameplate

data

For

field

weakening

control

SYNCHROSCOPESCREEN

ADJUST

THE

SWEEP

SPEED

ADAPTED

THE

MOTOR

ACCELERAITON

TIME

BRING

THE

CURVES

CONVENIENT

POSITION

Field

weakening

control

made

for

the

VS-505WII

combined

with

field

weakening

control unit

type

JGSM-51-

Connect

ammeter

the

field

circuit

and

voltmeter

output

terminals

Turn

IREF

the

control

circuit

board

and

FORCE

FLD

andV

LIMIT

field

controller

fully

counterclockwise

Seat

the

minimum

field

weakening

current

IREF

this

case, set the

current

80%

field

weakening

current

maximum

speed

(See the

test

report

Set the

rated

field

current

(field

intensifying

FORCE

FLD



(See the

test

report

name-

plate

data

Alter

the

motor

starts,

gradual

increasing

the

speed

reference

increases

the voltage

across

and

governs

some

value



Turn

LIMIT

clockwise gradually

that

the

governed

value

the rated voltage

MAINTENANCE

VS-505WIl

requires

almost

daily

inspection

keep

the correct

and

successful

operation,

periodic

maintenance

operations

should

per-

formed

The

users

should

prepare

their

own

maintenance

programs

based

the

following

guidelines

PERIODICINSPECTION

Table

shows

the

minimum

inspection items

and

the

procedures

Table

Periodic Inspection

PARTS

REPLACEMENT

Replace

the parts

required

after

checking

the

trouble

and

correcting

according

TROUBLE-

SHOOTING

GUIDE

Turn

off

the

power

before

part removal

mounting

Fig

Field

Thyrsitor

Assembly

Field

Thyristor

Replacement

With

all

the

Models,

thyristor

modules

consisting

a thyristor

and

diode

are

used

as the

field

thyristor

Replace

them

follows

Remove

the

four

mounting

screws

field

snubber

board

(3PCB),

lead

clamping screws,

control

power

connector

Then,

remove

snubber

board

See

Fig

Remove

lead

clamping

screws

connecting

thyristor,

and

remove

the leads

from

thyristor

this

case,

mark

all

terminals

for

identification

See

Fig

Remove

thyristor

mountingscrews

(2)

and

remove

thyristor

module

Check

;Ie

type

and

capacity of

new

thyristor

module

against the

requirements

Install

reversing

the

removal

procedure,

making

con-

nections

the

terminals

identified

the

marks

made

before

removing

the

old

thyristor

module

Coat

the thyristor

mounting

surface

with

joint

compound,

JOINTAL

madeby

Nippon

Light

Metal

. ,

Ltd

Main

Circuit

Thyristor

Replacement

VS-505W

230

The

unit

uses

a thyristor

module

consisting

two

thyristors

Replace

follows

Remove

snubber

board

(4PCB)

mounting

screws

(5)

and

lead

clamping

screws

Remove

snubber

board

(Fig

13)

Remove

bus

bar

mounting

screws

and

lead

clamping

screws

connected

thyristor

Remove

bus

bar

and

leads

(Fig

14)

this

case,

mark

the terminals

for

identification

Remove

two

thyristor

clamping

screws

and

thyristor

Check

the

replacement

module

for

type

and

capacity,

and

reinstall

reversing

the

dis-

assembly

procedure,

identifying the terminals

means

of the

marks

made

prior

disassembling

THYRISTOR

MTGSCREWS

Fig

With

SnubberBoard

Removed

Inspection

Part

Inspection

Item

Inspection

Procedure

What

Remarks

Thyristor

Noise

Check

for

Replace

Rule

thumb

cooling

any

inter-

for

cooling

fan

mittent

replacement

unusual

15,000

hours

noise

operation

Vibration

Feel

hand

General

Dust

Check

for

Clean

with

dirt

dust

clogging

electri-

dirt

cal

cleaner

Loose

ter-

adhesion

Tighten

minal

Check

for

screws

loose

screws

nuts

or nuts

Este manual sirve para los siguientes modelos

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