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10
TROUBLESHOOTING
Number of
“Service” red
light blinks
Description Possible Cause Corrective Action
2 Water level sensors
failed to detect tank
water
Scaling on the sensor Replace #1 sediment filter and
#2 RO filter. See steam
humidifier manual trouble-
shooting section for specific
humidifier steps
3 Failed to fill steam
humidifier tank
Expired #1 and #2 water fil-
ters
Missing flow control in drain
line
Replace flow control (provided
with 50046086-001)
Storage tank air charge is
less than 5-7 psi (Models
50045947-001 &
50045947-002
Drain the storage tank. Check
tank air pressure and, if low,
pressurize to 6 psi
4 Heating element
overheated
Scaling on element See steam humidifier manual
for cleaning steps
6 Water overflow
sensed in tank
Heavy sediment in tank
13 Tank failed to drain
Blinking “Cleaning
required” light on
steam humidifier
Continual water flow
to drain
Check valve or automatic
shutoff assembly plugged or
parts worn
Replace RO system
The following table refers to the steam humidifier’s fault detection feature.