Emerson 3000/ITR Manuel D’Utilisation

False canister full indication

Foaming

Check drain valve to ensure that it drains freely. Check and 

replace if defective.
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 

breaker trips

Shorts or loose connections

Check the wiring connections of the 24 VAC circuit.

Faulty circuit board

Replace the circuit board.

Main fuses blow 

approximately 15 seconds 

after unit is activated

Faulty solenoid

Check for magnetic field at coil.

Conductivity too high

Check amp draw of humidifier on startup. If it exceeds rated 

amps, increase setting of the % pot on the circuit board

Main fuses blow when 

drain valve is activated.

Mineral deposits obstruct 

drain valve

Check drain valve for obstructions and clean if necessary.

Faulty solenoid

Check for magnetic field at coil.

Faulty circuit board

Replace circuit board.

Unit On, humidifier will not 

operate

Humidifier not receiving power

Verify that RUN/DRAIN switch is in the RUN position.
Check fuses or CBs and replace or reset if necessary.
Make sure molex connector is securely plugged into circuit 

board and that no wires are loose.

Contactor pulled in, but no 

water enters canister

No water available to unit

Check external shutoff valves.

Clogged fill line strainer

Clean or replace fill line strainer.

Wiring breaks or loose 

connections

Check for faulty wiring and loose connections.

Faulty circuit board

Replace circuit board.

Water enters canister, but 

canister full circuit activates 

at a low water level

Foaming

Check drain valve and water supply.

Canister interface connections 

incorrect

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 

port.

Verify that the red wire from Terminal #2 on the interface 

connects to the red top terminal on the canister. This is the 

one farthest from the steam outlet port and is the high water 

sensor probe.

Full isolation has broken down

Remove red canister full wire from canister. If normal 

operation resumes, canister must be replaced. Remove the 

wire from Terminal #3 on the interface. If normal operation 

resumes, canister full interface must be replaced.

Drain assembly not operating 

freely

Check and replace coil or valve if necessary.

Faulty circuit board

Replace circuit board

Canister fills but overflows

Canister full circuit does not 

activate

Check wiring of canister full interface. Replace circuit board.