CORRECTIVE ACTION:
1. Check power supply
A. Replace fuse*
B. Reset breaker*
2. Adjust or replace belt
3. Replace motor
A. Adjust belt tension or replace
B. Lubricate or replace bearings
C. Adjust motor sheave to obtain motor
nameplate full load amps*
D. Call electrician
1. Open relief vents to increase exhaust
2. Adjust motor sheave to obtain motor
nameplate full load amps
3. Adjust belt tension or replace
1. Open relief vents to increase exhaust
2. Adjust to direct airflow as required
3. Check water distribution system
A. Clean or replace pads
B. Check water distributor system
C. Clean distributor holes
D. Clean or replace pump
E. Check for leaks and correct
F. Check float valve operation
G. Clean or replace bleed-off
H. Clean basket / screen
1. Adjust belt tension
2. Lubricate bearings, replace if needed
3. Correct motor sheave adjustment DO
NOT exceed motor nameplate amps*
4. Check and correct alignment
1. Adjust float
2. Replace float valve
3. Tighten standpipe (hand tight)
1. Lubricate or replace bearings
2. Re-center wheel in housing
3. Inspect wheel, replace if necessary
4. Inspect blower components, tighten
1. Inspect and adjust, replace as required
1. Open relief vents to increase exhaust
1. Drain, clean and flush reservoir
2. Check bleed-off, clean / replace pads
3. Turn pump ON for several minutes
prior to starting cooler
PROBLEM / SYMPTOM:
Units fails to start or deliver air
Unit starts, air delivery
inadequate
Inadequate cooling
Motor cycles or fails to operate
Water draining from unit
Knocking or banging sound
Blower shakes or rattles
Excessive humidity inside
Musty or unpleasant odor
POSSIBLE CAUSE:
1. No electrical power to unit
A. Fuse blown
B. Circuit breaker tripped
2. Belt loose or broken
3. Motor overloaded and/or frozen bearings
A. Belt too tight or broken
B. Blower wheel bearings dry / frozen
C. Motor overloaded
D. Inadequate wiring, non-functional
breaker or motor starter
1. Lack of adequate air exhaust
2. Motor under loaded
3. Belt too loose
1. Inadequate exhaust from building
2. Air registers / diffusers improperly set
3. Inadequate water supply / pad not wet
A. Pads clogged (mineral accumulation)
B. Dry spots or streaks on pad
C. Distributor tube holes plugged
D. Pump not working
E. Loose connections in water system
F. Inadequate water in reservoir
G. Inadequate bleed-off (pads clogging)
H. Pump basket/screen clogged
1. Excessive belt tension
2. Blower shaft tight or frozen
3. Motor overloaded
4. Pulleys mis-aligned
1. Float arm improperly set
2. Seat in float valve leaking
3. Standpipe not tight
1. Bearings dry
2. Wheel rubbing blower housing
3. Rotating off-balance
4. Loose parts
1. Belt or pulley loose
1. Inadequate exhaust from building
1. Stale or stagnant water in cooler
2. Pads clogged or mildewed
3. Pads not completely wet before
starting blower wheel
Troubleshooting:
The following guide is intended to help you diagnose and fix some of the most commonly encountered problems; by no means does this
guide cover all of the possible problems you may encounter. If you cannot diagnose and correct the problem, or if it persists, contact
qualified service personnel. All electrical work should be done by, or with the help of, a qualified electrician.
8 UL Classified Aerocool Industrial / Commercial Evaporative Cooler Use and Care Manual
* - If condition persists, call electrican
AC
CIÓ
N C
OR
RE
CT
IV
A:
1.
Re
vis
e s
um
in
is
tro
A.
Re
mp
la
ce
e
l f
us
ib
le
*
B.
Re
sta
ble
ce
r d
is
yu
nto
r*
2.
Aju
ste
o
re
mp
la
ce
la
b
an
da
3.
Re
mp
la
ce
e
l m
oto
r
A.
Aju
ste
b
an
da
o
re
mp
la
ce
B.
Lu
bri
ca
r /
re
mp
la
za
r c
ojin
ete
s
C.
Aju
sta
r p
ole
a m
otr
iz
a
la
a
mp
eri
os
d
e
la
p
la
ca
d
el
mo
to
r*
D.
Lla
ma
r a
u
n e
le
ctr
ic
is
ta
1.
Ab
ra
v
en
tila
cio
ne
s p
ara
a
um
en
ta
r d
es
ca
rg
a
2.
Aju
sta
r p
ole
a m
otr
iz
a
lo
s a
mp
eri
os
d
e l
a
pla
ca
d
el
mo
to
r
3.
Aju
ste
te
ns
ió
n o
re
mp
la
ce
d
e b
an
da
1.
Ab
ra
v
en
tila
cio
ne
s p
ara
a
um
en
ta
r d
es
ca
rg
a
2.
Aju
ste
o
d
iri
ja
e
l a
ire
3.
Re
vis
ar
dis
tri
bu
ció
n d
el
ag
ua
A.
Lim
pie
o
re
mp
la
ce
lo
s f
ilt
ro
s
B.
Re
vis
ar
dis
tri
bu
ció
n d
el
ag
ua
C.
Lim
pia
r l
os
a
gu
je
ro
s
D.
Lim
pie
o
re
mp
la
ce
la
b
om
ba
E.
Re
vis
e s
i h
ay
fu
ga
s y
c
orr
ija
F . R
ev
is
e l
a o
pe
ra
ció
n d
e l
a v
álv
ula
G . L
im
pie
o
re
mp
la
ce
d
e s
an
gra
do
H.
Lim
pie
e
l c
ed
az
o
1.
Aju
sta
r l
a t
en
sió
n
2.
Lu
bri
ca
r c
ojin
ete
s o
re
mp
la
ce
3.
Co
rre
gir
a
ju
ste
d
e l
a p
ole
a-N
O e
xc
ed
a e
l
am
pe
ra
je
e
n l
a p
la
ca
d
el
mo
to
r*
4.
Re
vis
ar
alin
ea
mie
nto
1.
Aju
ste
e
l f
lo
ta
do
r
2.
Re
mp
la
ce
v
álv
ula
d
e f
lo
ta
do
r
3.
Ap
rie
te
e
l t
ub
o (
co
n l
a m
an
o)
1.
Lu
bri
qu
e o
re
mp
la
ce
lo
s c
ojin
ete
s
2.
Re
-c
en
tra
r t
urb
in
a e
n l
a c
aja
3.
In
sp
ec
cio
ne
la
tu
rb
in
a o
re
mp
la
ce
4.
Ap
rie
te
c
om
po
ne
nte
s f
lo
jo
s
1.
In
sp
ec
cio
ne
, a
ju
ste
o
re
mp
la
ce
1.
Ab
ra
v
en
tila
cio
ne
s p
ara
a
um
en
ta
r d
es
ca
rg
a
1.
Dre
ne
y
e
nju
ag
ue
e
l d
ep
os
ito
2.
Re
vis
ar
sa
ng
ra
do
, l
im
pia
r o
re
mp
la
ce
3.
Pre
nd
er
la
b
om
ba
v
an
os
m
in
uto
s
an
te
s d
e c
om
en
za
r e
l e
nfr
ia
do
r
CA
US
A P
RO
BA
BL
E:
1.
No
c
orr
ie
nte
e
lé
ctr
ic
a h
ac
ia
la
u
nid
ad
A.
Fu
sib
le
q
ue
ma
do
B.
Dis
yu
nto
r d
is
pa
ra
do
2.
Ba
nd
a f
lo
ja
o
d
añ
ad
a
3.
Mo
to
r s
ob
re
ca
rg
ad
o/c
hu
ma
ce
ra
s a
to
ra
da
s
A.
Ba
nd
a a
pre
ta
da
o
ro
ta
B.
Co
jin
ete
s d
e t
urb
in
a s
ec
os
/a
to
ra
do
s
C.
Mo
to
r s
ob
re
ca
rg
ad
o
D.
Ala
mb
ra
do
in
ad
ec
ua
do
, d
is
yu
nto
r n
o
fu
nc
io
na
o
a
rra
nc
ad
or
de
l m
oto
r
1.
Es
ca
pe
d
e a
ire
in
ad
ec
ua
do
2.
Mo
to
r b
ajo
c
arg
ad
o
3.
Ba
nd
a m
uy
fl
oja
1.
Es
ca
pe
in
ad
ec
ua
do
d
el
ed
ifi
co
2.
Re
jill
as
/d
ifu
so
re
s m
al
aju
sta
do
s
3.
Su
min
is
tro
d
e a
gu
a /
fi
ltr
os
s
ec
os
A.
Filt
ro
s t
ap
ad
os
(a
cu
mu
la
ció
n d
e s
arr
o)
B.
Pu
nto
s s
ec
os
o
ra
ya
s e
n e
l f
ilt
ro
C.
Ag
uje
ro
s t
ap
ad
os
e
n e
l d
is
tri
bu
id
or
D.
Bo
mb
a n
o f
un
cio
na
E.
Co
ne
xio
ne
s f
lo
ja
s e
n s
is
te
ma
d
e a
gu
a
F . A
gu
a i
na
de
cu
ad
a e
n e
l d
ep
os
ito
G . S
an
gra
do
in
ad
ec
ua
do
(f
ilt
ro
s t
ap
ad
os
)
H.
Ce
da
zo
d
e l
a b
om
ba
ta
pa
do
1.
T en
sió
n e
xc
es
iv
a d
e l
a b
an
da
2.
Fle
ch
a d
e l
a t
urb
in
a d
ura
o
a
to
ra
da
3.
Mo
to
r s
ob
re
ca
rg
ad
o
4.
Po
le
a f
ue
ra
d
e l
in
ea
1.
Vá
lv
ula
d
el
flo
ta
do
r m
al
aju
sta
da
2.
As
ie
nto
d
el
flo
ta
do
r c
on
fu
ga
s
3.
Tu
bo
d
e r
eb
os
ad
ero
fl
ojo
1.
Co
jin
ete
s s
ec
os
2.
Tu
rb
in
a r
os
a l
a c
aja
d
el
so
pla
do
r
3.
Gir
a f
ue
ra
d
e b
ala
nc
e
4.
Pa
rte
s f
lo
ja
1.
Ba
nd
a o
p
ole
a f
lo
ja
1.
Es
ca
pe
d
e a
ire
in
ad
ec
ua
do
s d
el
ed
ifi
co
1.
Ag
ua
ra
nc
ia
o
e
sta
nc
ad
a e
n e
l d
ep
os
ito
2.
Filt
ro
s t
ap
ad
os
o
c
on
s
arr
o
3.
Filt
ro
s n
o e
stá
n c
om
ple
ta
me
nte
hú
me
do
s a
l c
om
en
za
r l
a t
urb
in
a
PR
OB
LE
MA
/
SÍN
TO
MA
:
No
c
om
ie
nz
a,
no
e
ntr
eg
a d
e a
ire
Un
id
ad
c
om
ie
nz
a,
en
tre
ga
de
a
ire
in
ad
ec
ua
da
En
fri
am
ie
nto
in
ad
ec
ua
do
Mo
to
r c
ic
la
o
n
o f
un
cio
na
De
rra
me
d
e a
gu
a e
n l
a u
nid
ad
Go
lp
ete
o o
tr
ue
no
s
So
pla
do
r s
e s
ac
ud
e y
re
ch
in
a
Hu
me
da
d e
xc
es
iv
a d
en
tro
Olo
r f
éti
do
d
es
ag
ra
da
ble
Tra
za
nd
o f
all
as
:
La
in
te
nc
ió
n d
e la
s
ig
uie
nte
g
uía
e
s e
l d
e a
yu
da
rle
a
d
ia
gn
os
tic
ar
y r
ep
ara
r lo
s p
ro
ble
ma
s m
ás
c
om
ún
me
nte
e
nc
on
tra
do
s: D
e n
in
gu
na
m
an
era
es
ta
g
uía
c
ub
re
to
do
s lo
s p
ro
ble
ma
s p
os
ib
le
s q
ue
u
ste
d e
nc
ue
ntr
e. S
i n
o p
ue
de
d
ia
gn
os
tic
ar
y c
orr
eg
ir
el p
ro
ble
ma
, o
s
i p
ers
is
te
o
pó
ng
as
e e
n
co
nta
cto
c
on
p
ers
on
al d
e s
erv
ic
io
c
ap
ac
ita
do
. T
od
o tr
ab
ajo
e
lé
ctr
ic
o lo
d
eb
e h
ac
er
o c
on
la
a
yu
da
d
e u
n e
le
ctr
ic
is
ta
c
ap
ac
ita
do
.
* -
S
i l
a c
on
dic
io
ne
s r
es
is
te
n,
lla
ma
r a
u
n e
le
ctr
ic
is
ta
8
U
L C
las
ific
ado
A
ero
coo
l I
ndu
str
ial
/ C
om
erc
ial
E
nfr
iad
or
Eva
por
ativ
o M
anu
al d
e U
so
y C
uid
ado
