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2008-08-28
Table 4. Status Messages with LED State
NHTC Display Message LED state System Action
Idle None Unit is made idle.
Humidifying GRN (after steam
production starts)
The unit has closed the contactor and is sending
current to the cylinder to humidify.
MANUAL DRAIN: ON YEL (blink) The drain valve is activated.
SAFETY LOOP; OPEN GRN
(blink)
Steam production stopped.
LEVEL SENSOR; ON None Deactivates the fill valve to prevent overfilling.
KEEP WARM ACTIVATED None Keep Warm feature activated, it has closed the
contactor to warm the water.
W19: Cylinder spent YEL, GRN The electronics allow the cylinder to be reset up
to four times before locking out the humidifier.
E19: Cylinder spent YEL, RED Humidifier interrupts operation and the fault relay
is activated.
FOAM: FULL TANK FLUSHING None The unit will initiate a flush of the cylinder and
resume operation.