L.B. White AW250, Инструкция и руководство пользователя

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21
Two Times Fl
a
sh
P
atte
rn
B
egin
s
12
S
e
c
ond
s
Af
te
r
C
ondition
Occurs. (P
atte
rn
Indi
c
ate
s
L
a
ck
o
f
“A
ir
Pr
o
v
ing
” in
F
an
S
e
c
tion
o
f
U
nit
.)
Are
Air Flo
w Switch
Contacts Stuck Open?
(P
er
form Continuity
Check
.)
Does
F
an Mo
tor Star
t Up
for Prepurge During
Initial Call f
or
Heat?
Is F
an 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 Flo
w Switch Arm on
Housing, Air Flo
w
Flapper Stuck, or Out of A
djustment. R
epair
or R
eplace as
Necessar
y.
Ye
s
Ye
s
Check f
or Pr
oper Clearance of F
a
n
Wheel t
o
Mo
tor Mount. If Good,
R
eplace F
an Wheel, or Check f
o
r
Housing Alignment.
Tight
en Set Scre
w(s) on F
an. Mak
e
sure Set Scre
w(s) are Tight
ened
A
gainst 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
e
r
Outlet Pre
v
enting
Air Flo
w 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, R
eplace Mo
tor R
ela
y
(if applicable), or R
eplace Ignition
Contr
ol Module.
No
Ye
s
Is
Pr
oper
V
oltage Being
Sent t
o
Air Flo
w
Switch?
Check Wiring Betw
een Module
and Com
ponent. R
epair or
R
eplace as Necessar
y.
No