Armstrong 6100 - Page 23

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8. If drain valve and fill valve are both energized and water is below the 1/3 full level in the electrode
 canister(floatcanisterforDIunits),makesurethestatusofSteamGenerationinOperationSetup
menu is “STEAM GEN.”. Perform continuity check to be sure.
9. Ifdrainvalveonlyisenergizedandwaterlevelisbelowthe2/3fulllevelinelectrodecanister(float
 canisterforDIunits),theremaybeexcessivedebrisinelectrodecanister(floatcanisterforDI 
 units).Inspectandcleanifneeded.Seepage21forCleaningProcedureforElectrodes.
10. PC board may be defective. Consult the factory.
Humidifier fills with water, but does not turn “STEAM GEN” message on for 3 minutes
after reaching low water level.
1. Perform steps 1 through 3 from above “Humidifier will not fill...”
2. For Tap Water:CheckACvoltageacrossthecommonelectrode(longest)andthelowlevel
 electrode(mediumlength).Thevoltagewillbeapproximately17-20VACifthecircuitisopen. 
When the water level closes, circuit voltage should drop to <5 volts.
 (a)Ifvoltageisnot17-20VACwithcircuitopen,checkcontinuityofwiresfromelectrodesto 
PC board. If continuity is OK, the PC board is likely defective.
 (b)Ifvoltageis17-20VACwithcircuitopen,butdoesnotdropwhenwatercontactsthetwo 
  electrodes,thewatermaybetoopure(consultfactory)orifthevoltagedropsveryslowlyto 
about 5 volts then the electrodes need cleaning. See page 21 for cleaning procedure for
electrodes.
3. For DI Water: Check continuity across the two wires to the low water float switch. If no continuity,
switch may be defective or “hung up”. Make sure movement of switch is vertical so the float arm
swings freely.
4. If high limit/sail circuit is closed, low water level circuit is closed, and there is a call for humidity,
the status of steam generation should be “STEAM GEN.”. If not, PC board or wiring harness is
defective.
“STEAM GEN.” turns on after initial fill to low water level, but amperage draw check
shows low or no amperage draw.
1. Check for line voltage to heating elements at secondary side of contactor and/or power module.
Verify power supply is same as voltage rating on humidifier nameplate.
2. If voltage is correct, the heating elements are likely defective. Turn off main power, disconnect all
 elementsandcheckelementresistances(seeresistancechartonPage41).Lookforopen 
circuits or elements with high resistance.
3. If voltage is not present at elements, check primary voltage fusing.