73 | Troubleshooting
No. Display
Message
LED System Detected
Cause Corrective Action(s)
E6
Cont
4 Incorrect wire type used
4 Use 18-24 AWG multi-
strand, twisted pair,
shielded cable
E7 CPU CRC Fault Red
Controller
hardware failure
1 Software has detected
a hardware problem
with main control board
1 Restart humidifier, if
error occurs within 1
minute replace main
control board. If error
does not occur then
primary power fluctuation
may be the cause.
2 Control board is wet 2 Let board dry and correct
condition which caused
board to become wet. Try
restart when dry.
W11
Safety Loop
Open
Grn
Blink
Safety loop open
(terminal 1 and
2)
1 On/Off device
connected to safety
loop is open
1a Normal operation, no
action required
1b Wrong setpoint, A/P not
sensing air movement
2 Loose wire 2 Check wiring to all On/Off
devices connected to
terminals 1 and 2.
W12
Cylinder Max
Level
Water level at top
of cylinder or
foaming
1 Humidifier has filled to
top of cylinder without
reaching demand
1 None, for information
only, it is normal for a
new cylinder to reach
max level before water in
cylinder is concentrated
and for an old cylinder to
reach max level near the
end of cylinder life.
1b Add ¼ teaspoon of salt
to fill cup to assist
cylinder in concentrating.
2 Water foaming 2 Check if water level is at
top of cylinder. If water is
not at top there may be
foam in the cylinder. See
W18 – Foam.
E12
Cylinder max
Level no current
Red
Water level at top
of cylinder with
no current
1 Current transformer
loose on driver board
1 Open disconnect, ensure
current transformer
spade connectors are
secure. Squeeze with
pliers if loose.
2 Primary wire not looped
through current current
transformer.
2 Open disconnect, rewire
primary wire through
current transformer.
3 High water sensor plug
is on an electrode pin.
3 Install high water senor
plug on cylinder pin with
shroud around it.
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