Liebert PW017 User Manual

• Reset unit (humidifier): To reset the humidifier, switch the auto On/Off/Drain switch at the
front of the humidifier to the Off position for at least five seconds, then switch it back to the On
position.
• Monitored leg is the primary wire to the cylinder that loops through the current sensing device
of the main PCB. This wire ends at the red cylinder plug at the cylinder.
Unit StatusLamp
Symptom Corrective Actions
Yellow Green
On On Maximum water level inside cylinder.
This usually happens on initial start-up after replacing the cylinder (normal).
Water is concentrated with minerals inside the cylinder.
Let unit run; yellow light will disappear when the unit is at full output. This may take a
day or two.
Off Off No power to the board.
Check for main power supply fault.
Turn power switch to "Drain" position. If drain valve is activated (sound of solenoid),
check connection to the board or board itself.
When no sound is present, check fuse (replace with 3.0 A if needed), transformer
(voltage should be present between fuse holder and ground screw).
1 flash
sequence
Off
Excess current. Operating amperage
exceeded 130% of rated amps. Water
is drained from the cylinder (drain
valve on for 10 minutes).
Check drain valve operation, drain time, possible drain restrictions.
Check fill valve for leaks (not holding supply water).
Back pressure may also cause very conductive water conditions. Check for short
cycling. Water conductivity too high.
2 flashes
in
sequence
Off
No current detection for 30 minutes
with continuous call for humidity.
Check water level in the cylinder - should be more than 1/4 full. If not, check fill rate,
24 VAC on fill valve terminals (unit must be on with call for humidity - green light on
steadily). Verify fresh water supply to the humidifier. Leaking drain valve may be at
fault (minerals blocking the plunger).
If cylinder is more than 1/4 full, check primary power, connections to the cylinder,
continuity of wires to cylinder.
Are power wires connected to proper terminals on the cylinder? (Color coding.)
Possibly wrong cylinder type.
Low water conductivity.
4 flashes
in
sequence
Off End of cylinder life - change cylinder.
Check water level in the cylinder; should be about 3/4full.
Check for foaming if water level is lower or cylinder life shorter than expected.
Change cylinder, clean drain valve.
Table 9.4 Steam-generating Humidifier Status Lamps: Causes and Corrective Actions
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Liebert PW017 Specifications

General

Brand	Liebert
Model	PW017
Category	Control Unit
Language	English