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Table 9-1. fault t able (continued) – Bell & Gossett 176R0649C Technologic 502 Series Pump Controller User Manual

Page 61

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61

Table 9-1. Fault T

able (continued)

Sy

m

pto

m

Po

ssi

bl

e

cau

se

Test

So

lu

tio

n

Mot

or

ov

er

lo

ade

d

Mot

or

is

dr

aw

ing

too

m

uc

h

cur

rent

for

the

app

lic

at

ion

.

Per

for

m

s

tar

tup

an

d

ver

ify

m

ot

or

c

ur

rent

is

w

ith

in

spec

ifi

cat

io

ns

.

If

not

, r

educ

e

the

lo

ad

on

the

m

ot

or

.

Loos

e

co

nnec

tions

Look

for

s

igns

of

ov

er

he

at

ing

on

conn

ec

tio

ns

to

O

L.

Per

for

m

pr

e-

st

ar

tup

chec

k

for

loos

e

conn

ec

tio

ns

an

d

tigh

ten.

R

epl

ac

e

an

y

ov

er

heat

ed

com

ponent

s

and

w

ires

.

O

ver

lo

ad

trip

s

O

L n

ot s

et c

or

re

ctl

y

An

im

pr

oper

ly

s

et

O

L

can

caus

e

th

e

O

L

to

tri

p

to

o

soo

n.

S

ee

pr

e-

st

ar

tup

pr

oc

edur

e

for

c

or

rec

t s

et

tin

g.

Set

c

or

rec

t m

ot

or

c

ur

rent

o

n

O

L.

C

ont

am

inat

ion

R

em

ov

e

cont

ac

tor

and

c

he

ck

for

c

ont

am

in

at

io

n.

If

cont

am

inat

ion

fou

nd,

re

pai

r or

rep

lac

e.

D

ef

ec

tiv

e

coi

l

C

om

par

e

coi

l r

es

is

tanc

e

to

func

tiona

l c

ont

ac

tor

s

of

the

sa

m

e

si

ze.

I

ns

pec

t c

oi

l f

or

s

igns

of

ov

er

he

at

ing

and

dam

age

s.

If

readi

ngs

ar

e

not

th

e

sam

e

or

v

is

ib

le

s

igns

of

dam

age,

repl

ac

e

coi

l or

c

ont

ac

tor

.

C

ont

ac

tor

fa

ils

to

p

ul

l i

n

Aux

ili

ar

y

con

tac

t

bi

ndi

ng

ac

tion

R

em

ov

e

aux

ili

ar

y

co

nt

ac

ts

and

tes

t c

ont

ac

tor

ac

tion.

If

cont

ac

tor

oper

at

es

w

ith

aux

iliar

ies

rem

ov

ed,

rep

lac

e

aux

iliar

y

cont

ac

ts

.

C

ont

am

inat

ion

R

em

ov

e

cont

ac

tor

and

c

he

ck

for

c

ont

am

inat

io

n.

If

cont

am

inat

ion

fou

nd,

re

pai

r or

rep

lac

e.

D

ef

ec

tiv

e

coi

l

C

om

par

e

coi

l r

es

is

tanc

e

to

func

tiona

l c

ont

ac

tor

s

of

the

sa

m

e

si

ze

.

If

readi

ngs

ar

e

not

th

e

sam

e

or

v

is

ib

le

s

igns

of

dam

age,

repl

ac

e

coi

l or

c

ont

ac

tor

.

C

ont

ac

tor

fai

ls

to

dr

op

out

Aux

ili

ar

y

con

tac

t

bi

ndi

ng

ac

tion

R

em

ov

e

aux

ili

ar

y

co

nt

ac

ts

and

tes

t c

ont

ac

tor

ac

tion.

If

cont

ac

tor

oper

at

es

w

ith

aux

iliar

ies

rem

ov

ed,

rep

lac

e

aux

iliar

y

cont

ac

ts

.

Pr

ob

lem

w

ith

m

ai

ns

po

w

er

R

ot

at

e

inc

om

ing

po

w

er

le

ads

int

o

op

tio

n

pane

l o

ne

po

si

tio

n;

A

to

B

, B

to

C

, a

nd

C

to

A

.

If

im

bal

anc

ed

leg

fol

lo

w

s

th

e

w

ire

it

is

a

po

w

er

pr

ob

lem

.

C

aus

es

c

an

var

y

cont

ac

t e

lec

tri

ci

an

or

po

w

er

ex

per

t f

or

sol

ut

ion.

Mai

ns

c

ur

rent

im

bal

anc

e

gr

eat

er

than

3%

Pr

ob

lem

w

ith

opt

ion

pane

l

R

ot

at

e

inc

om

ing

po

w

er

le

ads

int

o

op

tio

n

pane

l o

ne

po

si

tio

n;

A

to

B

, B

to

C

, a

nd

C

to

A

.

If

im

bal

anc

e

le

g

st

ay

s

on

sam

e

opt

ion

pa

nel

in

put

ter

m

inal

it

is

a

pr

ob

lem

w

ith

the

opt

ion

pane

l.

C

ont

ac

t f

ac

tor

y

for

as

si

st

anc

e.

Pr

ob

lem

w

ith

m

ot

or

or

m

ot

or

w

iri

ng

R

ot

at

e

ou

t go

in

g

m

ot

or

lea

ds

one

po

si

tio

n; U

to

V

, V

to

W

,

and

W

to

U

.

If

im

bal

anc

ed

leg

fol

lo

w

s

m

ot

or

lead

the

pr

ob

lem

is

in

the

m

ot

or

or

w

iri

ng

to

th

e

m

ot

or

.

C

aus

es

c

an

var

y

co

nt

ac

t

el

ec

tri

ci

an

or

m

ot

or

ex

per

t f

or

a

sol

ut

ion.

Mot

or

c

ur

ren

t

im

bal

anc

e

gr

eat

er

than

3%

Pr

ob

lem

w

ith

opt

ion

pane

l

R

ot

at

e

ou

t go

in

g

m

ot

or

lea

ds

one

p

os

iti

on

; U

to

V

, V

to

W

,

and

W

to

U

.

If

im

bal

anc

e

le

g

st

ay

s

on

sam

e

opt

ion

pa

nel

out

put

ter

m

inal

it

is

a

pr

ob

lem

w

ith

the

opt

ion

pan

el

.

C

ont

ac

t

fac

tor

y

for

as

si

st

anc

e.