Aprilaire 1830, 1850w installation instructions Troubleshooting Guide

Page 26

TROUBLESHOOTING (continued)

TABLE 5 – Troubleshooting Guide

Symptom

Possible Reason

Troubleshooting Procedure

Dehumidifier does not

No power to unit..

• Check that the dehumidifier is plugged in.

 

 

 

turn on/run..

 

• Check that the power switch is turned ON.

 

 

 

 

 

• Check that the control is turned ON.

 

 

 

 

 

• Check that the circuit breaker has not tripped.

 

 

 

 

 

 

 

 

 

Dehumidifier blower is

Pressure drop across

• Check dehumidifier air filter and wash or replace.

 

 

 

running but with little or

dehumidifier is higher

• Check for blocked duct work and clear.

 

 

 

no airflow..

than 0.4”w.c. for Model

• Verify that the outlet collar with backflow damper is installed on the outlet side of the dehumidifier.

 

1830 or 0.6”w.c. for

 

• Check if backflow damper is blocked or stuck and remove obstruction.

 

 

 

Model 1850/1850W..

 

 

 

 

 

 

 

 

 

 

 

 

 

Dehumidifier blower is

Float switch open..

• If float switch installed, check connections at control board and empty condensate pan.

running but compressor

 

• If no float switch installed check that the jumper is installed at the float switch terminals on the

is not..

 

control board..

 

 

 

 

 

 

 

 

 

 

Coil frosting..

• Lack of or reduced airflow. Check dehumidifier air filter and wash or replace.

 

 

 

 

• Check for blocked duct work.

 

 

 

 

 

• Inlet air conditions below 60°F. Increase the humidity setting.

 

 

 

 

 

 

 

 

 

Inlet air temperature is

• Verify all ductwork is properly sealed.

 

 

 

 

outside of the 50°F –

 

 

 

 

 

104°F range or the dew

 

 

 

 

 

point is below 40°F and

 

 

 

 

 

there is a demand for

 

 

 

 

 

dehumidification..

 

 

 

 

 

 

 

 

 

 

When zoned, the

Incorrect damper wiring

• Verify wiring between dampers and 24 VAC transformer.

 

 

 

dehumidifier damper

or bad connection..

• If wired for Two Zone operation, verify that 24 VAC transformer is 40 VA minimum.

does not open in

 

• Check all wiring connections between dampers and control board.

 

 

INSTALLER TEST mode..

 

 

 

 

• Verify the normally closed dampers are in the Primary Zone ductwork and the normally open

 

 

 

 

dampers are in the Secondary Zone ductwork..

 

 

 

 

 

 

 

 

 

The ventilation damper

Cycle time has been

• The damper will not open if the Ventilation Time has already been met.

 

 

does not open when the

met..

 

 

 

 

HVAC fan is active..

 

 

 

 

 

ODT error or outdoor air

• Check that the ODT is wired correctly to the

 

 

 

 

Outdoor

Resistance

 

 

outside of ODT range..

dehumidifier control board and connections are secure..

Temperature

 

 

 

 

 

 

• Check that the ODT is installed in the outdoor air

0°F

84,500 Ohms

 

 

 

intake according to the set-up specified in the

 

 

 

 

 

20°F

46,000 Ohms

 

 

 

Ventilation Section beginning on page 19..

 

 

 

 

 

 

 

 

40°F

26,000 Ohms

 

 

 

• Remove the ODT leads from the dehumidifier control

 

 

 

 

 

 

 

 

60°F

15,500 Ohms

 

 

 

board and check the resistance.. Compare the reading

 

 

 

with the table shown..

80°F

9,500 Ohms

 

 

 

 

100°F

6,000 Ohms

 

 

 

 

 

 

 

 

 

 

 

 

 

Dehumidifier is not

Drain line blocked or unit

• Verify that the unit is level.

 

 

 

draining properly..

not level..

• Check the drain line blockages and for a continuous downward slope.

 

 

 

 

 

 

 

 

The HVAC fan turns on

Dehumidifier is sampling

• The dehumidifier will turn on the HVAC fan during air sampling or as needed to meet the ventilation

unexpectedly..

or ventilation in

time..

 

 

 

 

progress..

 

 

 

 

 

 

 

 

 

 

Dehumidifier is

Normal function..

• Air is reheated across the condenser coil, resulting in a temperature rise between inlet and outlet.

producing hot air..

 

 

 

 

 

 

 

 

 

 

 

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Contents Installation Instructions Safety InstructionsTable of Contents Specifications Closet installations SET UP Dehumidifier for InstallationStandard basement and attic installations fully ducted Crawl space, Sealed Attics or basement installationsDetach the on-board control by removing the four Control LocationTo move the control Voltage Hard WiringMinimum Wire Size AWG Minimum Circuit CapacityReattach the electrical service panel and side panel Hard WiringWiring Instructions Location Considerations Leveling Drain InstallationCondensate PAN, Condensate Pump and Float Switch Ductwork Ducting to Hvac System Basement and Attic InstallationsRequired Component Ducting NotesOptional Components Ducting to Hvac System Closet InstallationsOptional Component Ductwork Grilles with 10 Duct CollarsDucting for TWO Zone Installations Whole-Home Primary Zone InstallationExternal Control Crawl SPACE/SEALED Attic ControlOptional W & Y Wiring Wiring the Dehumidifier to the Hvac System and Zone DampersWiring to the Hvac System Wiring to Zone DampersSystem SET-UP & Checkout External Control Zone90-1854selections DEH W/ACZoning and/or Ventilation System SET-UP & CheckoutDehumidification Only 90-1854energizedTWO Zone Primary and Secondary Crawl Space or Sealed Attic Remote Control Using ModelSampling will show on the display Press the ON/OFF button to turn the dehumidifier control onVentilation Installation Intake Hood AWG WireInstallation & Wiring VentilationVENT-AUTO & VENT-TIMED Outdoor Temperature Sensor InstallationVentilation Dehumidifier can ventilate in four modesCFM Required Record the required CFMDetermine Fresh AIR Delivery Rate CFM DeliveredRepeatedly until the Vent For 3 seconds to accessDisabled screen appears Dehumidifying the Fresh AIR Adjusting Ventilation Time After Initial SET UPSequence of Operation Ventilation with AN External ControlDiagnostic Codes TroubleshootingDiagnostic Codes Troubleshooting Troubleshooting Guide Service Parts 10010759 B2206316A
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