Table 5 – Troubleshooting Guide (continued)
Problem
Possible Cause
action
Humidifier makes gurgling
sound .
Excess condensation in steam hose .
Make sure steam hose has constant downward slope to humidifier or to tees
and traps in low spots of hose .
Fill valve makes banging
sound .
Water hammer from line pressure .
Make sure water supply line does not contact ductwork .
Install shock arrestor .
Install section of 1/4" braided fill line . Conform to local codes .
Humidifier will not fill .
Saddle valve not open .
Open saddle valve .
Malfunctioning fill valve .
Check valve function using Test Mode .
Humidifier will not drain .
Debris in drain valve blocking outlet port .
Remove canister and clean debris from drain valve .
Malfunctioning drain valve .
Check valve function using Test Mode .
Water in duct from dispersion
tube .
Dispersion tube installed incorrectly .
Install dispersion tube with tublets facing straight up .
Impurities in steam hose or pipe causing
foaming .
Rinse canister and hose in clean water .
Service light flashing red
before end of humidification
season .
Canister full of mineral deposits .
Plumb humidifier to filtered water .
Plumb humidifier to softened water .
Humidifier runs in short cycles (does not
reach capacity) .
Use blower activation relay or run constant HVAC fan .
Yellow steam light .
Humidifier operating below rated
capacity . (Normal operation for systems
plumbed to low conductivity water and
systems that operate for short cycles .)
Plumb humidifier to softened water .
Use blower activation relay or run constant HVAC fan .
Operate humidifier on 240 volts .
To determine operating current, attach clamp-on ammeter to one of the
electrode wires on top of canister .
A small amount of salt (1/10 tsp or one fast-food salt packet) can be added to
fill cup to introduce conductive minerals to canister . Do not over-salt . System
will drain and refill with clean water, further prolonging start .
Humidifier is not satisfying
demand .
Control setting is too low .
Adjust control to higher setting .
Control mounted in wrong location .
See Installation Instructions with control for correct mounting location .
Short run times .
Use blower activation relay or run constant HVAC fan .
Humidifier capacity limited by input
power (120V) .
Operate humidifier on 240 volts .
Excess humidity .
Control setting is too high .
Adjust control to lower setting .
Control mounted in wrong location .
See Installation Instructions with control for correct mounting location .
CHeCkInG SySTeM oPeRaTIon & TRoUbleSHooTInG
(ConTInUeD)
20
