Aprilaire 1710A - Operating Instructions; Dehumidification; Adjusting Dehumidifier Setting; Troubleshooting Guide

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TROUBLESHOOTING GUIDE
Symptom Possible Reason Troubleshooting Procedure
Dehumidifier does
not turn on/run.
Nopowertounit. •Checkthatthedehumidifierispluggedin.
•CheckthatthepowerswitchonthedehumidifierisON.
•Checkthatcontrolknobissettoadrynesslevelnumber.
•Checkthatthecircuitbreakerhasnottripped.The1710A
requiresaminimumof8amps.
Dehumidifier blower
is running but little
or no airflow.
Pressure drop across
filter is too high.
•Checkdehumidifierairfilterandwashorreplace.
Dehumidifier blower
is running but
compressor is not.
Floatswitchopen. •Iffloatswitchinstalled,checkconnectionsatcontrolboardand
empty condensate pan.
•Ifnofloatswitchinstalled,checkthatthejumperisinstalledat
the float switch terminals on control board.
Coil frosting. •Lackof,orreducedairflow.Check/cleanfilter.
•Inletairconditionsbelow60°F.Usethecontrolknobtoturn
down the dryness setting.
Dehumidifier is not
draining properly.
Drain line or drain
trap blocked.
•Checkthatthedraintrapisinstalledcorrectly.
•Checkthedraintrapanddrainlineforblockagebyslowly
pouring one pint of water into the dehumidifier drip pan located
below the coil.
•Checkdrainlineforcontinuousdownwardslope.
Dehumidifier is
producing hot air.
Normalfunction. •Airisreheatedacrossthecondensercoil,resultingina
temperature rise between inlet and outlet.
OPERATING INSTRUCTIONS
90-1327
LED CODES
Green LED Codes
Activity Status
ONSolid CompressorON
Blinking 1 second on, 1 second off Sampling
Blinking1/2secondON,1/2secondOFF Defrosting
AlternatingGreen&Red Control knob was left in Test mode
DEHUMIDIFICATION
1. Check the wiring to any accessories if applicable.
2. Plugunitinandturnon/offswitchtoON.
3. Wait5secondsthenrotatethemaincontrolknobclockwise
totheTESTposition.
4. If set up correctly, the dehumidifier blower will turn on and
thedehumidifierdamperoutputwillturnon.After3minutes
the dehumidifier compressor will turn on. The blower and
compressorwillremainonfor1minuteinTESTmode.After
1 minute has elapsed, the dehumidifier blower and compressor will turn off and the dehumidifier
damper output will turn off.
5. TheStatusLEDwillblinkredandgreenalternatelyifthecontrolknobhasbeenleftinTESTafterthe
compressor has turned off.
ADJUSTING DEHUMIDIFIER SETTING
1. Usethecontrolknobontheunittosetthedesireddrynesslevel.
 •Basedonindoortemperature,useTable 1 to determine the control knob setting to achieve the
desired humidity level.
 •Formostinstallations,startwithasettingintheNORMALrange.See Figure 3.
 •MovingtheknobclockwisetowardsMOREwillincreasedehumidifierruntime,allowingforlower
humidity levels.
 •MovingtheknobcounterclockwisetowardsLESSwilldecreasedehumidifierruntime,allowingfor
higher humidity levels.
2. ReferencetheInstallationInstructionsfortheModel76Control,Model8910HomeComfortControl
™
, or
Third-PartyControlforsettingadjustmentsifusingacontrolotherthanthedehumidifier’sonboardcontrol.
FIGURE 3 – Control Knob Setpoint
EXAMPLE:Atanindoortemperatureof75°F and a control knob setting of 3 (56°F DP), the dehumidifier
will work to achieve a 53% humidity level.
 •The%RHvaluesare±5%andaretobeusedasaGUIDE ONLY for initial set-up.
 •Indoortemperatureismeasuredattheinlettothedehumidifier.
TABLE 1 – %RH (± 5%) Based on Control Knob Setting & Indoor Temperature
Control Knob Setting
& Dew Point
Indoor Temperature
65°F 70°F 75°F 80°F
1–Less,65°FDP 84% 71% 60%
2–60°FDP 86% 73% 61% 52%
3–Normal,56°FDP 74% 63%
53%
45%
4–Normal,52°FDP 64% 54% 45% 39%
5–Normal,48°FDP 55% 46% 39% 33%
6–44°FDP 47% 39% 33% 28%
7–More,40°FDP 40% 34% 28% 24%