36
T
i
lt
System
Cl
o
se
T
an
k
V
a
lv
e
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 * * *
Fig. 19
Step 1
Step 2
Step 3
14) 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. 18, point E (Page 29)
.
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.
36
T
i
T
i
lt
lt
Sy
System
Cl
ose
T
aan
k
V
aa
lv
e
If the noise comes bac
c
k,
k,
t
t
ry
ry
the
he
above procedure again another
r 2
2-3
-3
t
t
im
imes. Sometimes it takes several
tries to get rid of all th
he
e ai
ai
r
r
in
in
the system.
If the noise persists after a few days, that means there is air in your water source, or the current C
C
heck
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 fo
for
r as
as
si
si
stance.
* *
*
*
End Trouble-Shoot Guide * * *
Fig. 19
Step 1
Step 2
Step 3
14) RO Mak
akes
es
H
Humming Noise
g
Wh
Wh
en
n R
R
O makes a humming noise, most like
e
ly
ly
i
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. 18, point E (Page 29)
.
T
To purge air from the check valve,
d
do
o as
as
f
f
ollows:
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 on
n th
th
e
e RO spigot. Let pure water flow thr
hr
ou
ou
h
h th
the spigot for about 1 minute. This fo
o
rc
rces
es
t
the
air to flow di
dire
rect
ctly
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
on
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
S
S
tep-
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.
