Error The unit turns on or off. in Kaysun air-conditioning

Error The unit turns on or off.

Error: The unit turns on or off.

Description: The system cycles on and off abnormally. This behavior is often related to incorrect refrigerant levels — either too much or too little.

Cause: Imbalanced refrigerant charge or leaks in the refrigerant circuit.

Solution: Check for refrigerant leaks and recharge the system with the correct amount of refrigerant gas according to the manufacturer’s specifications.

Error It comes out of unit but does not cool.

Error: It comes out of unit but does not cool.

Description: The unit operates (air is emitted) but fails to lower the room temperature effectively.

Cause: Temperature or mode not configured correctly; can also be caused by airflow restrictions, dirty filters, or refrigerant issues.

Solution: Verify and configure the temperature and operating mode correctly. If settings are correct, inspect filters, airflow and refrigerant condition; address any faults found (clean/replace filters, fix leaks, recharge refrigerant).

How to diagnose and fix these problems

1. Check controls and settings:

   Ensure the thermostat/remote temperature and mode (cool/auto) are set correctly. Incorrect settings can cause poor cooling or frequent cycling.

2. Inspect airflow and filters:

   Dirty or blocked filters and obstructed airflow reduce cooling efficiency and can cause the unit to cycle abnormally. Clean or replace filters and remove obstructions.

3. Evaluate refrigerant:

   Low or excessive refrigerant will affect operation. Look for signs of leaks (oil stains, hissing) and measure system pressures if qualified to do so.

4. Repair leaks and recharge:

   If leaks are found, repair them and recharge with the correct refrigerant amount per the manufacturer’s specifications.

5. Check outdoor unit and fans:

   Ensure the outdoor condenser is clean, unobstructed and that fans and motors run properly.

6. Call qualified service when needed:

   If you cannot identify or safely fix the problem, contact Kaysun technical or specialized service for diagnosis and repair.

More tips

• If you fail to resolve the Kaysun air conditioning error, we strongly recommend contacting Kaysun technical service or a certified HVAC technician.
• Professional technicians can accurately diagnose refrigerant levels, detect hidden leaks, and perform safe recharge and repairs.
• Regular maintenance (cleaning filters, checking refrigerant and airflow) helps prevent these errors and prolongs equipment life.