Humidification System
19
69-2307—01
The humidifier has internal system diagnostics that monitor system operation, maintenance sched-
ules, and faults. If a system fault is detected, the system will attempt to recover itself up to five
times in a 24 hour period. If unable to recover in that time, the red Call Service LED light will acti
-
vate.
If the humidifier Call Service light is red, a system fault has occurred from which the humidifier
can not recover by itself. The table below shows the possible faults, along with steps to fix the
humidifier.
If the red Call Service LED light is on, press/release the RESET button. The red Call Service LED
light will begin blinking in a series that indicates what fault occurred. Refer to the table below
for the fault signified by the number of blinks that occur. To clear the fault, press and hold the
RESET button for 5 seconds.
Press/hold the EMPTY button to clear the Service Timer light (i.e. the Press Empty button).
Press/release the EMPTY button to drain the tank.
No. of
Red
Light
Blinks
Fault Description
Auto-
Recoverable?
Steps to Fix
To be Performed by Professional HVAC Technician Only
1
Water/Heater temper-
ature sensor failed.
Yes, system will
return to “Ready”
if fault no longer
exists in 1 hour.
• Unplug the humidifier and remove cover.
• Check water sensor connection to electronic board.
• Reattach cover and plug the humidifier in.
• If fault reappears, follow the cleaning steps on pages 23–25.
• Reassemble tank and press the RESET button.
• If fault returns, replace with applicable wattage heating
element.
2
Water sensors failed.
Yes, system will
return to “Ready”
if fault no longer
exists in 1 hour.
Will attempt to
reset itself 5 times
in 24 hours.
• Unplug the humidifier and remove cover.
•
Disconnect water level sensor wiring, remove screen and
lift snap-hinge clamp.
Remove water sensor assembly.
• Clean water sensor probes using warm soapy water so that
the metal is exposed.
• Reassemble the sensor assembly in the unit, reattach and
secure cover.
• Plug unit back in and press the RESET button.
• If fault reappears, replace sensor assembly.
3
Failure to fill tank
with water.
Yes, system will
return to “Ready”
if fault no longer
exists in 1 hour.
• Ensure inlet water is on.
• Check for leaks around the tank seal and solenoid.
• Turn off water supply and replace in-line water filter.
• Press/hold RESET button until the red Call Service light
turns off.
• If tank still fails to fill, press the EMPTY button (if unit fails to
drain, unplug unit and make sure water in tank is cool).
• Follow tank cleaning instructions on page 23. Ensure you
have a firm grip of the tank prior to releasing the tank,
especially if water is present.
• Clear any excess debris from the tank’s bottom orifice to the
solenoid.
• Reassemble tank and plug unit back in. Press the RESET
button.
• If water still fails to flush into the tank, replace the solenoid
valve.
M24901
A
B
TRoubleshooTIng
dIP sWITCh seleCTIon
