Steam generating humidifier troubleshooting

		Troubleshooting
Table 27 Steam generating humidifier troubleshooting

Symptom	Possible Cause	Check or Remedy

		Check drain valve to ensure that it drains freely. Check and
		replace if defective.
	Foaming
False canister full indication	Foaming	Check water supply. If commercially softened, reconnect to
		raw water supply. If connected to hot water reconnect to
		cold water.
Main 24 VAC fuse or circuit	Shorts or loose connections	Check the wiring connections of the 24 VAC circuit.
breaker trips	Faulty circuit board	Replace the circuit board.

Main fuses blow	Faulty solenoid	Check for magnetic field at coil.
approximately 15 seconds	Conductivity too high	Check amp draw of humidifier on startup. If it exceeds rated
after unit is activated	Conductivity too high	amps, increase setting of the % pot on the circuit board

	Mineral deposits obstruct	Check drain valve for obstructions and clean if necessary.
Main fuses blow when	drain valve	Check drain valve for obstructions and clean if necessary.
Main fuses blow when	drain valve
drain valve is activated.	Faulty solenoid	Check for magnetic field at coil.

	Faulty circuit board	Replace circuit board.

		Verify that RUN/DRAIN switch is in the RUN position.

Unit ON, humidifier will not	Humidifier not receiving power	Check fuses or CBs and replace or reset if necessary.
operate	Humidifier not receiving power
operate		Make sure molex connector is securely plugged into circuit
		Make sure molex connector is securely plugged into circuit
		board and that no wires are loose.

	No water available to unit	Check external shut-off valves.

Contactor pulled in, but no	Clogged fill line strainer	Clean or replace fill line strainer.

	Wiring breaks or loose
water enters canister	Wiring breaks or loose	Check for faulty wiring and loose connections.
	connections
	Faulty circuit board	Replace circuit board.

	Foaming	Check drain valve and water supply.

		Check connection on component plate in humidifier cabinet.
		Terminal #1 on the square block interface device must be
		connected to L2 of the power terminal block. L2 must also
		be connected to the electrode closest to the steam outlet
	Canister interface connections	port.
	incorrect	Verify that the red wire from terminal #2 on the interface
		Verify that the red wire from terminal #2 on the interface
Water enters canister, but		connects to the red top terminal on the canister. This is the
canister full circuit activates		one farthest from the steam outlet port and is the high water
at a low water level		sensor probe.
		Remove red canister full wire from canister. If normal
	Full isolation has broken down	operation resumes, canister must be replaced. Remove the
	Full isolation has broken down	wire from terminal #3 on the interface. If normal operation
		wire from terminal #3 on the interface. If normal operation
		resumes, canister full interface must be replaced.

	Drain assembly not operating	Check and replace coil or valve if necessary.
	freely	Check and replace coil or valve if necessary.
	freely
	Faulty circuit board	Replace circuit board

Canister fills but overflows	Canister full circuit does not	Check wiring of canister full interface. Replace circuit board.
Canister fills but overflows	activate
	activate

3000 specifications

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Table 27 Steam generating humidifier troubleshooting

Symptom

3000 specifications