ALORAIR Sentinel HDi120

Questions and Answers

J
Jenna BrownAug 18, 2025
What to do if my ALORAIR Dehumidifier shows trouble code HI?
- R
  Roberto MeyerAug 18, 2025
  If your ALORAIR Dehumidifier displays the trouble code HI, it means the room temperature is above 105°F. Decrease the room temperature to bring it within the operating range (below 105°F). If the error persists, check the sensor.
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nrichmondAug 20, 2025
What to do if my ALORAIR Sentinel HDi120 Dehumidifier shows trouble code LO?
- S
  shawnadamsAug 20, 2025
  If your ALORAIR Dehumidifier displays the trouble code LO, this indicates the room temperature is below 33.8°F. Increase the room temperature so it is within the operation range (above 33.8°F). If the error continues, check the sensor.
D
david05Aug 23, 2025
Why is the display blank on my ALORAIR Sentinel HDi120 Dehumidifier?
- S
  Suzanne OwenAug 23, 2025
  If your ALORAIR Dehumidifier displays a blank screen, it could be due to a poor connection or a power outage. First, verify that both ends of the power cord are securely plugged in. If that doesn't resolve the issue, try resetting the power.
H
harringtonaustinAug 26, 2025
What to do if my ALORAIR Sentinel HDi120 Dehumidifier displays trouble code E4?
- C
  Christopher WebsterAug 26, 2025
  If your ALORAIR Dehumidifier displays trouble code E4, it indicates a problem with the pump. Verify that the pump is properly installed and functioning. If it is, unplug the unit for two minutes, then restart it.
K
Karina MontgomeryAug 28, 2025
How to fix no airflow in my ALORAIR Sentinel HDi120?
- C
  courtney98Aug 28, 2025
  If your ALORAIR Dehumidifier is not blowing air, the filter might be dirty, or the air inlet or outlet could be blocked. Clean the filter and clear any blockage from the air inlet or outlet.
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Pamela BeanAug 30, 2025
What does trouble code E1 mean on my ALORAIR Dehumidifier?
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  meadowsjacquelineAug 30, 2025
  If your ALORAIR Dehumidifier displays trouble code E1, it indicates a humidity sensor or communication error. Check to ensure that the sensor wire is connected at both ends. If no issues are visible, the sensor may be faulty.
C
Carlos SmithSep 2, 2025
What to do if my ALORAIR Sentinel HDi120 Dehumidifier display is blank?
- T
  Tamara StoneSep 2, 2025
  If the display on your ALORAIR Dehumidifier is blank, there could be a poor connection or a power outage. First, verify that both ends of the power cord are securely plugged in. If that doesn't solve the issue, try resetting the power to the unit.
P
Patricia GordonSep 4, 2025
What does E4 mean on my ALORAIR Sentinel HDi120 Dehumidifier, and what to do?
- B
  Brittany AcostaSep 4, 2025
  If your ALORAIR Dehumidifier is displaying the error code E4, this indicates a problem with the pump. Check that the pump is correctly installed and working. If it seems fine, unplug the unit for two minutes, and then restart it.
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Nancy KingSep 6, 2025
What does HI mean on ALORAIR Dehumidifier and how to fix it?
- J
  Joseph KeithSep 7, 2025
  The HI error code on your ALORAIR Dehumidifier means the room temperature is above 104°F. To resolve this, decrease the room temperature to be within the operating range (below 104°F). If the error persists after the temperature is corrected, have the sensor checked.
M
Matthew MillerSep 9, 2025
What does LO mean on ALORAIR Sentinel HDi120 Dehumidifier and how do I fix it?
- J
  Jill FreemanSep 9, 2025
  The LO error code on your ALORAIR Dehumidifier indicates that the room temperature is below 33.8°F. You should increase the room temperature so it is within the operating range (above 33.8°F). If the error continues to display after adjusting the temperature, the sensor should be checked.

Summary

Key Functions

Power Key

Turns the dehumidifier on/off. Includes audible beeps and indicator light status.

Arrow Buttons

Used to set the desired humidity setpoint on the display screen (36%-90%).

Continuous Mode

Sets the unit to run continuously by setting humidity below 36%.

Maintenance

Cleaning and Servicing

Covers cleaning the body, coils, filters, electrical access, and pump maintenance.

Troubleshooting

Error Code Troubleshooting

Details for resolving error codes E1, E4, E5, and the specific E4 pump alarm.

The AlorAir Sentinel HDi120 is a dehumidifier designed for restoration, moisture control, and ventilation applications. It is built for efficient removal of moisture from various environments, including crawl spaces, basements, and other conditioned spaces.

Function Description:

The Sentinel HDi120 operates by drawing air across an evaporator coil, which is cooler than the dew point of the air. This process causes moisture to condense out of the air. The now drier air is then reheated through a condenser coil and distributed back into the room. An integrated humidistat monitors the relative humidity of the space, activating the dehumidifier when the humidity rises above a user-selected setpoint. It features a continuous mode for constant operation regardless of humidity levels and an auto defrost function to prevent ice buildup on the evaporator coils. The unit also includes an integrated condensate pump for automatic water drainage, with a manual drain button for storage or relocation.

Important Technical Specifications:

Capacity:
- 120 Pints Per Day at 80°F/60%RH
- 93 PPD at 73°F/60%RH
Airflow: 290 CFM
Operating Temperature Range: 33.8-104°F
Operating Relative Humidity Range: 36%-90%
COP (Coefficient of Performance): 2.7 L/kWh
Refrigerant: R410A
Amperage Usage: 7.8 Amps
Power Supply: 115V/60Hz/Single Phase
Outlet Requirement: 15 Amp, 3 prong, GFCI
Sound Level: 60 dBa
Dimensions (LxWxH): 23.8" x 14.7" x 17.9"
Certifications: ETL Listed

Usage Features:

Installation: The unit should be placed on a level surface, ideally with blocks or pavers if on a vapor barrier. A minimum of 2 hours should be allowed for the compressor to settle if the unit has been turned or flipped. Proper ventilation requires a minimum of 6 feet clearance for the inlet and 36 inches for the discharge, with a side panel facing a wall for optimal air diffusion. The dehumidifier is designed for upright and level operation.
Drain Line Setup: A compression nut is slid over the hose end, which is then attached to the compression fitting on the unit and tightened.
Power Key: Used to turn the dehumidifier on and off. Pressing once turns it on (two beeps, green power light), and pressing a second time turns it off (one beep, with a 1-minute fan delay).
Arrow Buttons: Used to set the desired humidity level between 36% and 90%. The unit operates when indoor humidity exceeds the setpoint. Displayed humidity levels are approximate (+/-5%).
Continuous Mode: Activated by setting the humidity below 36% using the down arrow key. The continuous light illuminates green, and the display shows "CO". To return to normal humidistat operation, the setpoint must be moved above 36%.
Manual Drain Button: Used to remove water from the integral pump's reservoir, particularly before storing or moving the unit. Each press activates the drain for 15 seconds.
Indicator Lights:
- Humidity Display Screen: Shows current space humidity or the setpoint during adjustment.
- Power Indicator Light (Green): Solid green indicates proper power and readiness; flashing green indicates standby mode (humidity below setpoint).
- Continuous Mode/Auto Defrost Light: Green for continuous operation, red for auto defrost (clearing ice from coils).
- Compressor Light: Red indicates compressor warming up, green indicates active operation.
Remote Control (Optional Accessory): Connects via a 25-foot CAT 5 cable, allowing remote monitoring and control.
- On/Off Button: Starts/stops the machine.
- Up/Down Buttons: Adjust humidity level.
- Mode Button: Switches between dehumidifier and ducted application modes. A specific symbol indicates whether the remote or dehumidifier sensor is being used.
- Temperature Button: Displays current temperature.
- Continuous Button: Activates continuous mode, displaying "CONT."
- Drain Pump Button: Removes water from the pump reservoir for extended storage.
Ducted Applications: The unit can be ducted to condition adjacent rooms. Both inlet/return and supply grilles are designed for 10-inch flex ducting. Ducting should be secured with tie wraps, with a maximum total length of 10 feet. Inlet and outlet duct adapters are optional.

Maintenance Features:

Cleaning the Machine Body: Use a soft, damp cloth to wipe the exterior. Avoid soap or solvents.
Coil Maintenance: Clean coils annually with an approved self-rinsing, foaming coil cleaner (e.g., WEB® Coil Cleaner).
Cleaning the Filter:
- MERV-1 Filter: Remove prefilter, vacuum or wash with warm water (no soap).
- MERV-10 Filters: Replace as necessary, recommended at least once per year.
Electrical Access: Requires unscrewing 13 screws on the side panel and 2 screws on the control board cover.
Pump Maintenance: The integral condensate pump requires routine maintenance to prevent issues from dirt and slime. This includes cleaning the drain pan, hose to the condensate pump, pump reservoir, pump head assembly, and discharge tubing.
- Basic Pump Cleaning (Annual): Remove filters, press drain button, disconnect power, pour a 16-ounce bleach (1 oz bleach + 15 oz water) or vinegar (4 oz white vinegar + 12 oz water) solution into the drain tray, let soak for 15 minutes, reconnect power, fill reservoir with 16-32 ounces of water, and flush/cycle the pump at least twice. Repeat if debris persists.
- Advanced Pump Cleaning (As Needed): Press drain button, unplug unit, remove cover to access pump, unscrew and remove pump head from reservoir, wipe reservoir clean, reassemble pump, then follow the basic pump cleaning steps for solution application and flushing.
Dehumidifier Storage: Turn off and allow to dry. Perform advanced pump cleaning steps 1-3. Wrap and secure the power cord. Cover the filter mesh. Store in a clean, dry space.

Troubleshooting:

The manual provides a troubleshooting guide for common issues and error codes:

Display Blank: Check power cord connection, reset power.
No Airflow: Clean filter, clear blockages in air inlet/outlet.
E1 (Humidity Sensor or Communication Error): Check sensor wire connections; if no visible issues, sensor may be faulty.
E4 (Problem with Pump): Verify pump installation and function. Unplug for two minutes, then restart. If the issue persists, check discharge line for obstructions and clean as per maintenance. If maintenance is insufficient, replace the hose and/or pump.
LO (Room Temperature below 33.8°F): Increase room temperature to operating range. If error persists, check sensor.
HI (Room Temperature above 104°F): Decrease room temperature to operating range. If error persists, check sensor.
E5 (Refrigerant Leak): Contact installer for assistance.

Warranty:

The AlorAir Sentinel HDi120 comes with a limited warranty:

Six (6) Month: Parts and labor (includes shipment charges for replacement parts or unit).
One (1) Year: Parts and labor (excludes shipment charge to send defective product back).
Three (3) Years: Parts and labor on Refrigeration System ONLY (Compressor, Condenser, and Evaporator) (excludes transportation cost).
Five (5) Years: Parts on Refrigeration System ONLY (Compressor, Condenser, and Evaporator) (excludes transportation cost). The warranty is valid only for products purchased from the manufacturer or authorized dealers, operated, installed, and maintained according to the user guide. Warranty service requires proof of purchase or order number. Exclusions include damage from unintended use, unauthorized modification, cosmetic damage, abuse, misuse, pest infestation, accidents, natural disasters, incorrect electrical supply, failure to perform proper maintenance, or use in a SPA or room with an OUTDOOR POOL.