Delonghi Portable Air Conditioner Troubleshooting Guide

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Common Problems with the Delonghi Portable Air Conditioner

Problem Possible Causes Solutions
Air Conditioner Keeps Shutting Off Short cycling due to dirty filter; Malfunctioning compressor Clean your unit; Contact a technician to replace faulty parts
Air Conditioner Smells Bad Dirty filter; Mold; Refrigerant leak; Burning parts Inspect and clean your unit
Air Conditioner has a 3-minute Delay After Restarting Safety measure in compressor delaying restart by 3 minutes Completely normal, wait for normal operation
Air Conditioner is Not Blowing Cold Air Dirty air filter and coils; Refrigerant leak Clean your AC; Contact a technician to fix the leak

#1 Air Conditioner Keeps Shutting Off

Despite being a durable and long-lasting brand, one of the common problems of Delonghi portable air conditioners is short cycling. This is when the air conditioner keeps shutting off and restarting intermittently, often a few minutes at a time.

Short cycling is common in air conditioning units that are rarely cleaned, but can also present in an air conditioning unit with a faulty compressor or malfunctioning parts. Run the self-diagnosis system of your portable air conditioner to troubleshoot the problem, or have one of our HVAC technicians inspect your unit for an accurate diagnostic test.

#2 Air Conditioner Smells Bad

Different smells coming from your Delonghi portable air conditioner indicates different underlying problems with your unit. A musty odor indicates mold, which may have built up in the condensate drain hose, or air exhaust hose. In this case, cleaning the drain lines and air exhaust hose will immediately fix the issue.

Other smells, like the smell of sulfur or a burning, smoky smell, is not from your air exhaust hose, but may come from external sources such as a decaying critter, or car exhaust from the street. However, they may also indicate a refrigerant leak or burning parts, so it is best to shut off your Delonghi air conditioner, and call one of our technicians to fix the issue.

#3 Air Conditioner has a 3-minute Delay After Restarting

The Delonghi air conditioner series, which includes the Delonghi portable air conditioner, features a safety gadget in its compressor that prevents the air conditioner from restarting immediately after shutting down. This delay of three minutes is normal in most Delonghi air conditioner models, and is meant to prevent damages to your portable air conditioner.

#4 Air Conditioner is Not Blowing Cold Air

If your Delonghi air conditioner is blowing warm or hot air instead of cool air, and is not cooling the room sufficiently, then there are a couple of possible reasons. First, a dirty portable air conditioner will not blow cold air as the filthy dust filter restricts air movement around the AC unit. Clean your AC filters, coils, and exhaust hose to fix the issue.

Another reason could be a refrigerant leak, where coolant escapes out of your Delonghi portable air conditioner, causing your AC to create warm air instead of cool air. One of our licensed technicians at Luce Aircon will be able to fix this issue.

How to Reset Your Delonghi Air Conditioning Unit

Reset Point: Power Cord

Resetting your Delonghi air conditioner may help fix any AC issues and error codes, however, it may not fix hardware issues such as a dirty filter or condenser coils. To reset your AC unit, simply shut down your unit, and unplug the power cord. Wait for 5 minutes before plugging your AC unit back in, and power it on to check if restarting your unit solved the issue.

Delonghi Portable Air Conditioner Troubleshooting Guide

#1 Check the Error Code

Air conditioners typically show an error code when something is wrong with the unit. Check the LED display of your air conditioner to find the error code, and reference check the code with your owner's manual to find the root cause of the problem. You can then move to troubleshooting the issue.

#2 Have Your Unit Cleaned Professionally

Give us a call to have your unit cleaned, maintained, and repaired professionally. Our technicians are well-versed in cleaning and repairing air conditioners across all brands and models, so you can be sure we'll get the job done right!

Common Error Codes

Error Code Meaning
LT Frost prevention mode activated.
H0 High temperature(heat mode) caused frequency to decrease.
H1 Defrosting
H2 Static dust eliminated protection.
H3 Compressor overload protection.
H4 System abnormality.
H5 IPM Module protection.
H6 No feedback from the indoor motor.
H7 Synchronization failure.
H8 Full of water protection.
H9 Heater error.
HC PFC protection.
HL Delonghi portable AC internal tray full.
CF Delonghi portable AC filter is dirty.
C2 Current leakage protection.
C3 Wrong connection protection.
C5 Jumper error protection.
C6 No earthing.
PF Delonghi portable AC probe failure or sensor damaged.
F0 Jam protection.
F1 When the F1 alarm is active, Indoor unit room sensor is disconnected.
F2 Indoor unit pipe sensor disconnected.
F3 Outdoor unit ambient sensor disconnected.
F4 Outdoor unit pipe sensor disconnected.
F5 Outdoor unit delivery line sensor short-circuited/disconnected.
F7 Oil circle under cooling mode.
F8 Current overload caused frequency to decrease.
F9 Exhaust overload caused frequency to decrease.
FR Tube temperature overload caused frequency to decrease.
FH Freezing caused frequency to decrease.
E1 High pressure protection.
E2 Defrost protection.
E3 Low pressure protection.
E4 Compressor gas discharge protection.
E5 Current overload protection.
E6 Communication malfunction.
E7 MODE conflict.
E8 High temperature protection.
E9 Protection against cold air.

Maintaining Your Delonghi Air Conditioner

The Delonghi air conditioner is known as a durable and efficient brand - but with the proper care and maintenance routine. Your air conditioner needs a maintenance schedule at least once every 4-6 months to keep it in good shape, and to prevent any issues that come with a dirty, unkempt air conditioner.

Check out our article on Trane aircon error codes!

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