33
If the noise comes back, try the above procedure again another 2-3 times. Sometimes it takes several
tries to get rid of all the air in the system.
If the noise persists after a few days, that means there is air in your water source, or the current Check
Valve is resonating with your water pressure and pipes, creating the noise.
In this case, a new Check Valve will solve the problem. Contact APEC customer service for assistance.
* * * End Trouble-Shoot Guide * * *
Close
Tank
Valve
Fig. 18
Step 1
Step 2
Step 3
12) RO Makes Humming Noise
When RO makes a humming noise, most likely it’s caused by air bubbles being trapped in the “Check
Valve” during installation. See check valve on
Fig. 17, point E (Page 27)
.
To purge air from the check valve, do as follows:
Step 1: Close the tank’s valve.
Step 2: Tilt the RO system to the right. Put something under the 3rd filter housing to keep RO tilted. This
helps dislodge the air bubbles from the Check Valve.
Step 3: Turn on the RO spigot. Let pure water flow throuh the spigot for about 1 minute. This forces the
air to flow directly out to the spigot, bypassing the tank.
Step 4: Turn off the spigot. Wait for about 10 seconds. Repeat Step 3 again. Do that 3-4 times. If you
see air sputtering out of the spigot, repeat Step-3 until pure water can flow smoothly from the spigot, or
until the noise goes away.
Step 5: When the noise is gone, open the tank valve, let RO run as usual.
Tilt
Sy
s
t
e
m
C
h
e
c
k
Va
lv
e
33
If the noise comes back, try the
he a
abo
bo
ve procedure again another 2-3
3
tim
mes
es.
S
Sometimes it takes several
tries to get rid of all the air in t
t
he
he
system.
If the noise persists af
f
te
ter
r
a
a
fe
fe
w days, that means there is air in your
wa
ter source, or the current Check
Valve is resonating with
h y
y
o
our water pressure and pipes, creating the noise.
In this case, a new Check Valve will solve the problem. Contact APEC customer service for as
as
si
sist
st
a
ance.
* * *
E
End
nd T
Trouble-Shoot Guide * * *
Cl
Clo
ose
Ta
Ta
a
a
nk
V
Vaalve
Fig. 18
Step 1
Step 2
S
Step 3
12) RO Mak
akes
es
H
Humming Noise
g
Wh
Wh
en
n R
RO makes a humming noise, most like
ke
ly
ly
it’s caused by air bubbles being
g
trappe
ped
d
in
the “Check
Va
Va
lv
v
e”
e
during installation. See check valve
on
on
F
Fig. 17, point E (Page 27)
.
T
To purge air from the check valve,
d
do
o as
as
f
follows:
Step 1: Close the tank’s valve.
Step 2: Tilt the RO system to the right. Put something under the 3rd filter housing to keep RO tilted. Thi
hi
s
s
helps dislodge the air bubbles from the Check Valve.
Step 3: Turn o
o
n
n th
th
e
e RO spigot. Let pure water flow thr
hr
ou
ouh
h th
the spigot for about 1 minute. This fo
o
rc
rce
es
t
the
air to flow di
dire
rect
ct
ly
ly
out to the spigot, bypassing the ta
ta
nk
nk
.
Step 4
4
:
:
Tu
Tu
rn
rn off the spigot. Wait for about 10
0 s
s
ec
ec
o
onds. Repeat Step 3 again. Do that
t
3
3-4
-4
t
tim
im
es. If you
see
ai
ai
r
r
sp
sputtering out of the spigot, repeat
at
Step-
p
3 until pure water can flow smooth
h
ly
ly f
f
ro
rom the spigot, or
un
u
ti
til
l
t
the noise goes away.
S
Step 5: When the noise is gone, op
op
en
en
t
he
tank valve, let RO run as usual.
Tilt
Sy
s
t
t
e
m
e
m
C
h
e
c
k
Va
lv
e
Summary of Contents for Ultimate RO-QUICK90
Page 2: ......
