To Next PageTo Next PageHow to troubleshoot Aprilaire 1770A Dehumidifier that does not turn on?
If your Aprilaire Dehumidifier isn't turning on, here's what to check: * Make sure the unit is properly plugged in. * Ensure the power switch on the dehumidifier is turned ON. * Verify the control knob is set to a dryness level number. * Check the circuit breaker; the 1750A model needs at least 8 amps, while the 1770A requires a minimum of 14 amps.
Why Aprilaire 1770A blower is running but compressor is not?
If your Aprilaire Dehumidifier blower is running but the compressor isn't, here are a few things to investigate: * If you have a float switch installed, check the connections at the control board and empty the condensate pan. * If there's no float switch, make sure the jumper is correctly installed at the float switch terminals on the control board. * Also, coil frosting, reduced airflow, or inlet air conditions below 60°F can cause this issue. Check/clean the filter and duct work. Use the control knob to turn down the dryness setting.
What to do if Aprilaire 1770A blower is running but little or no airflow?
If the blower in your Aprilaire Dehumidifier is running but there's little to no airflow, it might be due to a high-pressure drop. Here’s what you can do: * Inspect the dehumidifier's air filter and either wash or replace it. * Check for any blockages in the ductwork and clear them. * Ensure the backflow damper isn't blocked or stuck; remove any obstructions if found.
How to fix Aprilaire 1770A Dehumidifier that is not draining properly?
If your Aprilaire Dehumidifier isn't draining properly, it could be due to a blockage in the drain line or drain trap. Here’s how to address it: * Ensure the drain trap is correctly installed. * Check for blockages by slowly pouring one pint of water into the dehumidifier drip pan below the coil. * Make sure the drain line has a continuous downward slope.
Why does Aprilaire 1770A Dehumidifier make the HVAC fan turn on unexpectedly?
If the HVAC fan in your system turns on unexpectedly, it's likely due to the Aprilaire Dehumidifier's sampling or air cycling process. The dehumidifier activates the HVAC fan during sampling and as needed to meet air cycling or ventilation requirements, based on the Cycle Period and Cycle Time settings.
Why HVAC fan operates continuously after test on Aprilaire Dehumidifier?
If the HVAC fan operates continuously after moving the control knob out of the TEST position on your Aprilaire Dehumidifier, it could be due to a couple of reasons: * The HVAC equipment might be actively calling for heating or cooling. * The HVAC fan might be set to run constantly. * Alternatively, the dehumidifier's air cycling/ventilation could be set to constant ON. If the Cycle Time equals or exceeds the Cycle Period, continuous HVAC fan operation will occur. Reduce the Cycle Time if you don't want the fan running constantly.
Why is my Aprilaire Dehumidifier producing hot air?
If the Aprilaire Dehumidifier is producing hot air, it's because the air is reheated as it passes across the condenser coil, leading to a temperature increase between the inlet and outlet.
Why ventilation damper does not open on Aprilaire 1770A?
If the ventilation damper isn't opening when the HVAC fan is active with your Aprilaire Dehumidifier, here are a couple of things to consider: * The damper won't open if the Cycle Time has already been met. * There might be an ODT error, or the inlet air temperature might be out of range. Check that the ODT is correctly wired to the Outdoor dehumidifier control board and that connections are secure. Also, verify the ODT is installed in the outdoor air intake according to the setup instructions. Remove the ODT leads from the dehumidifier control board and check the resistance, comparing the reading with the provided table.
What to do if HVAC fan does not turn on during test of Aprilaire 1770A Dehumidifier?
If the HVAC fan doesn't turn on when the CYCLE TIME potentiometer is turned to TEST on your Aprilaire Dehumidifier, consider these potential causes: * There might be no power to the HVAC equipment. Verify that the HVAC equipment is receiving power. * There might be no power to the dehumidifier. Check the voltage across the R & C terminals on the dehumidifier control board; it should read between 18 VAC and 30 VAC. * Incorrect wiring could be the issue. Verify the wiring and connections between the thermostat, HVAC system, and dehumidifier.
How to troubleshoot Aprilaire 1770A damper that does not open in test mode?
To troubleshoot why the damper on your Aprilaire Dehumidifier isn't opening in TEST Mode, check the following: * Verify the wiring between the dampers and the 24 VAC transformer, ensuring it's correct. * If wired for Convertible operation, confirm that the 24 VAC transformer has a minimum rating of 40 VA. * Inspect all wiring connections between the dampers and the control board to ensure they are secure.
General| Model Number | 1770A |
|---|---|
| Category | Dehumidifier |
| Type | Whole House |
| Energy Star Certified | Yes |
| Drain Options | Gravity or pump |
| Control Type | Digital |
| Voltage | 115V |
| Refrigerant | R-410A |
| Moisture Removal Capacity | 90 pints per day |
Configures HVAC fan operation cycles for air circulation and comfort control.
Manages outdoor air intake for ventilation based on temperature and system settings.
Interprets diagnostic information from Green and Red LED status indicators.
Provides solutions for common operational problems indicated by unit symptoms.
