Nortec NH Series installation manual Symptom Diagnosed Probable Cause Corrective Action

Symptom Diagnosed	Probable Cause	Corrective Action
Unit is awaiting a demand or	This is normal when there is no need for	Normal Operation
control signal.	humidity. If you believe there is a need for
	humidity, and the unit should not be idle,
	refer to troubleshooting
The unit is now boiling water in	This is normal when there is a need for	Normal Operation
the cylinder and filling as	humidity. If you believe there is no need for
necessary.	humidity, and the unit should idle, refer to
	troubleshooting
This is not a fault or warning. It	Manual drain switch has been activated.	Press Manual Drain button again to
is an indication that the manual		stop the drain action.
drain switch has been activated.
Safety loop circuit (terminal 1	One or more of the safety devices is open	Determine which device is preventing
and 2) is open.	as the result of a device failure, improper	continuity of the safety loop circuit, and
	installation or an unsafe condition has been	verify that it is functioning properly and
	detected.	is properly installed and calibrated.
Water has reached the top of	1. Normal on start-up with a new cylinder	If foaming is determined to be the
the cylinder and has activated	or a cylinder that has been completely	cause of the high water indication,
the high water sensor. This is	drained because of an extended off	consult your local representative about
not an error or fault, but is	period. This condition can last several	possible adjustment and/or a foam
normal on start-up and at the	hours until the water in the cylinder has	detection kit. If not foaming, consider it
end of a cylinder life span.	concentrated or the electrodes can no	normal operation unless water level is
	longer provide rated capacity or	not at the top of the cylinder.
	adjusted capacity. Water level
	automatically rises to meet the demand.
	2. Foaming can also cause an invalid high
	water indication.
Keep Warm feature is enabled	Unit is entering the Keep Warm cycle. The	Normal for unit with Keep Warm setting
and proceeding to a Keep Warm	unit has been inactive for a given period	activated.
Cycle.	and is keeping the water warm.
Electronics have determined	The cylinder must be replaced with the	When ordering a new cylinder, quote
cylinder is spent. Within the next	same type and model.	the model number presently installed in
72 hours the humidifier will stop.		the humidifier.
Electronics have determined	The cylinder must be replaced with the	When ordering a new cylinder, quote
that the cylinder is spent.	same type and model.	the model number presently installed in
		the humidifier.
The electronics has detected	The unit has detected a foaming condition	The unit will initiate corrective action on
foaming within the cylinder (only	within the cylinder.	its own.
for units with the optional Foam
Detection Package).

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Page 43 2008-08-28