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L.B. White AD100 User Manual

Page 23

background image

T

w

o Times

Lac

k of air

pr

o

ving in fan

section.

Are

air

-pr

o

ving switch

contacts stuck open?

(P

er

form continuity

check

.)

Does

fan mo

tor star

t up

during initial call

for heat?

Is

fan wheel

binding?

Is f

an wheel

loose on mo

to

r

shaf

t?

Ye

s

Ye

s

Ye

s

No

Check f

or binding of

air

-pr

o

ving switch arm

on housing. R

epair or

replace as necessar

y.

Ye

s

Ye

s

Check f

or pr

oper clearance of

fan wheel t

o

mo

tor mount. If

good, replace f

an wheel, or

check f

or housing alignment.

Tight

en set scre

w(s) on f

an.

Mak

e sure set scre

w(s) are

tight

ened against flat(s) of

mo

tor shaf

t.

Ye

s

Clean the f

an wheel with

com

pressed air or sof

t brush.

Def

ectiv

e mo

to

r

or capacit

or

.

R

eplace mo

to

r.

Ye

s

R

emo

v

e

obstruction.

Clean as necessar

y.

No

Is f

an wheel

plugged with

dir

t?

No

Is there

an obstruction

in blo

w

er outlet

pre

v

enting air

-pr

o

ving

switch closure?

No

Is

pr

oper v

oltage

supplied t

o

mo

to

r

fr

om ignition

module?

No

If im

pr

oper v

oltage is supplied,

contact electrician.

- OR -

If no v

oltage is supplied t

o

mo

to

r,

check wiring, replace

mo

tor rela

y (if applicable), or

replace ignition contr

ol module.

No

Ye

s

Is

pr

oper

v

oltage being

sent t

o

air

-pr

o

ving

switch?

Check wiring betw

een

module and com

ponent.

R

epair or replace as

necessar

y,

or replace

ignition contr

ol module.

No

22

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