Pure Humidifier ES Series User Manual

13
Problem
Humidifier will not heat
Humidifier will not fill
Humidifier will not stop
filling or is short cycling
Possible Cause
Blown heater fuse(s)
Control transformer not
producing 24 vac control
voltage
Safety controls open
(air flow switch, high-limit, etc.)
Faulty humidity sensor
Faulty immersion heater
No water pressure
Drain valve open
No power to the fill valve
Fill valve stuck open
Drain valve open
Probes need cleaning
Check probe wiring on
terminals #5 thru #8
Incorrect panel to tank ground
Line noise or radio frequency
Recommended Action
Check and replace.
Check transformer output.
Verify voltage across terminals #1 (hot) and #3
(comm).
Verify that all safety controls are completing the
safety circuit.
Verify voltage to and from humidity sensor.
Check and verify heater voltage and
amperage. Compare to diagram or
nameplate label ratings.
Check water supply.
Close drain ball valve.
If auto drain system is utilized, verify that the
manual drain lever on the front of the drain
valve is closed.
Check for 24 vac across solenoid valve.
Check for 24 vac across solenoid valve. If no
voltage, check for dirt under valve seat.
Close drain ball valve.
If auto drain system is utilized, verify that the
manual drain lever on the front of the drain
valve is closed.
Remove Tri-Probe assembly and clean probe
ends.
Make sure the Tri-Probe wiring is ran in
separate conduit from power wiring.
Make sure terminal #8 (ground) is a dedicated
ground wire (conduit is not sufficient).
Shielded cable may be necessary.
Trouble Shooting

Pure Humidifier ES Series Specifications

General

Brand	Pure Humidifier
Model	ES Series
Category	Humidifier
Language	English