What does your Kelvinator fault code mean?
Pick the code showing on your remote, wall controller or indoor unit and see what it means, what commonly causes it, and what is safe to check yourself. This page covers 35 Kelvinator fault codes for units sold in Australia, compiled from official Australian manufacturer and distributor documentation, the same references our own technicians carry.
Heads up: Kelvinator uses the same code with different meanings on different product ranges, so check the model range shown next to the code.
Every Kelvinator fault code at a glance
Some models show faults as a flashing-light pattern instead of a code; documented lamp patterns are listed alongside their codes.
| Code | What it means | Severity |
|---|---|---|
| CF (Current KSV and KSD inverter split systems (KSV25/35/50/71/90 and KSD25/35/50/71/90 HRH and HWH series)) also shown as cF |
The unit is warming up before blowing heated air so it does not blow cold air on you at the start of heating, which is normal operation | Normal operation |
| D1 (KSD inverter split systems with demand response (KSD25/35/50/71/90 HRH, HWH and HWJ series)) also shown as D2, D3, d1, d2, d3 |
Your electricity provider has temporarily limited the unit’s power use through the DRED demand response system, which is normal operation and not a fault. D1 pauses the compressor, while D2 and D3 let it keep running at reduced power (capped at 50 and 75 per cent of rated consumption) | Normal operation |
| DF (Current KSV and KSD inverter split systems (KSV25/35/50/71/90 and KSD25/35/50/71/90 HRH and HWH series)) also shown as dF |
The unit is defrosting its outdoor coil, which is normal in heating mode on cold or humid mornings | Normal operation |
| E2 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The indoor coil is getting too cold and the unit has paused itself to stop ice forming | Minor fault |
| E4 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The compressor’s discharge line has run too hot and the unit has shut down to protect itself | Fault – service needed |
| E5 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The unit detected it was drawing too much electrical current and shut down to protect itself | Fault – service needed |
| E8 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The indoor unit has run too hot and paused itself to cool down | Minor fault |
| EC (Current KSV and KSD inverter split systems (HRH and HWH series)) | The unit has detected a refrigerant leak and stopped to protect itself | Urgent – turn it off |
| EE (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The outdoor unit’s control board cannot load its stored program, so the unit will not run | Fault – service needed |
| EU (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The unit has slowed itself down because its power module is running hot | Minor fault |
| F0 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) also shown as FO |
The system has detected it is low on refrigerant gas | Fault – service needed |
| F6 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The outdoor unit is running too hot and the system has slowed down to protect itself | Minor fault |
| F8 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The incoming power voltage is too low, so the unit is protecting itself | Minor fault |
| F9 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The system believes it is short of refrigerant gas | Fault – service needed |
| FC (Current KSV and KSD inverter split systems (KSV25/35/50/71/90 and KSD25/35/50/71/90 HRH and HWH series)) | The unit is in forced cooling test mode because the manual button under the front panel was pressed twice, which is a test feature and not a fault | Normal operation |
| FH (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The indoor coil is close to freezing, so the unit has slowed the compressor down | Minor fault |
| FP (Current KSV and KSD inverter split systems (KSV25/35/50/71/90 and KSD25/35/50/71/90 HRH and HWH series)) | The unit is in 8 degree heating mode, holding the room at 8 degrees to keep it above freezing, which is a feature and not a fault | Normal operation |
| H0 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) also shown as HO |
The unit is running too hot in heating mode and has slowed itself down to protect the system | Minor fault |
| H1 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The outdoor unit is defrosting itself, which is normal in heating mode on cold mornings | Normal operation |
| H4 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The system is overheating and has cut back to protect itself | Minor fault |
| H5 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The inverter power module in the outdoor unit has tripped its over-current protection | Fault – service needed |
| H7 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The inverter power module has tripped its protection and stopped the compressor | Fault – service needed |
| HC (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The power factor correction circuit in the outdoor unit has tripped, usually from a power supply problem | Fault – service needed |
| LP (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The indoor and outdoor units are from different models and do not match each other | Fault – service needed |
| P5 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The compressor is drawing an unusual amount of current, often because the coils cannot breathe | Fault – service needed |
| P7 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | A temperature sensor circuit in the outdoor unit is faulty | Fault – service needed |
| P8 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The outdoor unit’s power module has overheated and shut the system down | Fault – service needed |
| PH (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The incoming power voltage is too high, so the unit has protected itself | Minor fault |
| PL (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The incoming power voltage is too low, so the unit has protected itself | Minor fault |
| SC (Current KSV and KSD inverter split systems (KSV25/35/50/71/90 and KSD25/35/50/71/90 HRH and HWH series)) | The unit is running its self clean cycle to dry the indoor coil, which is normal after pressing the SELF CLEAN button | Normal operation |
| U1 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The outdoor unit has detected a problem in the compressor’s electrical phase circuit | Fault – service needed |
| U3 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The power supply to the unit is unstable | Minor fault |
| U5 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | A circuit in the outdoor unit’s electronics has failed | Fault – service needed |
| U7 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The valve that switches the system between heating and cooling is not working properly | Fault – service needed |
| U9 (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series)) | The outdoor unit’s electronics cannot read the power supply correctly, a fault called zero crossing | Fault – service needed |
Codes that mean switch the system off
If your Kelvinator unit shows EC, turn the system off at the isolator and leave it off. These faults involve the compressor, refrigerant or electrical protection, and running the unit can cause further damage.
The most serious Kelvinator fault codes explained
What does Kelvinator fault code EC mean? (Current KSV and KSD inverter split systems (HRH and HWH series))
The unit has detected a refrigerant leak and stopped to protect itself
Likely causes:
- Refrigerant leak in the piping or coils
- Undercharged system after installation or repair
- Faulty leak-detection sensing (less common)
Safe checks before you call:
- Turn the unit off at the isolator and leave it off
- Open windows to air the room as a precaution and do not use open flames near the unit
- Do not keep restarting the unit
What does Kelvinator fault code E4 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The compressor’s discharge line has run too hot and the unit has shut down to protect itself
Likely causes:
- Blocked airflow over the outdoor coil
- Outdoor fan motor not running correctly
- Low refrigerant charge
- Very hot weather combined with a dirty outdoor coil
Safe checks before you call:
- Check nothing is blocking airflow around the outdoor unit, such as plants, covers or stored items
- Turn the system off at the isolator or breaker for 5 minutes, then restart
What does Kelvinator fault code E5 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The unit detected it was drawing too much electrical current and shut down to protect itself
Likely causes:
- Supply voltage problems at the property
- Compressor working too hard due to blocked coils
- Failing compressor or outdoor electronics
Safe checks before you call:
- Check whether lights or other appliances are also playing up, which points to a power supply issue
- Turn the system off at the isolator or breaker for 5 minutes, then restart
What does Kelvinator fault code EE mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The outdoor unit’s control board cannot load its stored program, so the unit will not run
Likely causes:
- Program chip not seated correctly on the outdoor control board
- Failed outdoor control board
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 minutes, then restart to see if the code clears
What does Kelvinator fault code F0 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The system has detected it is low on refrigerant gas
Likely causes:
- Refrigerant leak somewhere in the system
- Undercharged system after installation or repair
Safe checks before you call:
- Turn the system off at the isolator and leave it off, as running low on gas can damage the compressor
What does Kelvinator fault code F9 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The system believes it is short of refrigerant gas
Likely causes:
- Refrigerant leak somewhere in the system
- Undercharged system after installation or repair
Safe checks before you call:
- Turn the system off at the isolator and leave it off until it has been checked
What does Kelvinator fault code H5 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The inverter power module in the outdoor unit has tripped its over-current protection
Likely causes:
- Failing inverter power module on the outdoor control board
- Compressor working too hard due to blocked coils
- Power supply problems
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 minutes, then restart
- Check nothing is blocking airflow around the outdoor unit
What does Kelvinator fault code H7 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The inverter power module has tripped its protection and stopped the compressor
Likely causes:
- Failing inverter power module on the outdoor control board
- Compressor drawing too much current
- Power supply problems
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 minutes, then restart
What does Kelvinator fault code HC mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The power factor correction circuit in the outdoor unit has tripped, usually from a power supply problem
Likely causes:
- Unstable supply voltage at the property
- Fault on the outdoor control board
Safe checks before you call:
- Check whether other appliances are also affected, which points to a supply problem
- Turn the system off at the isolator or breaker for 5 minutes, then restart
What does Kelvinator fault code LP mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The indoor and outdoor units are from different models and do not match each other
Likely causes:
- Mismatched indoor and outdoor units installed together
- Wrong replacement unit fitted after a repair
Safe checks before you call:
- No safe checks at home; this needs the installer or a technician to confirm the correct pairing
What does Kelvinator fault code P5 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
The compressor is drawing an unusual amount of current, often because the coils cannot breathe
Likely causes:
- Blocked airflow at the indoor or outdoor coils
- Dirty filters or coils
- Compressor or outdoor electronics starting to fail
Safe checks before you call:
- Clean the return air filters if they look dusty
- Check nothing is blocking airflow around the indoor and outdoor units
- Turn the system off at the isolator or breaker for 5 minutes, then restart
What does Kelvinator fault code P7 mean? (Older KSV inverter split systems (KSV26/35/70 CRE and HRE, KSV53/62/80 HRE series))
A temperature sensor circuit in the outdoor unit is faulty
Likely causes:
- Failed sensor circuit on the outdoor control board
- Damaged sensor wiring
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 minutes, then restart to see if the code clears
Fault confirmed? Here is what to do next
A fault code is the starting point, not the fix. Start here:
- Air conditioner repairs – how we diagnose and fix Kelvinator faults across Adelaide. Our fault find covers the full diagnosis, and it is on us if you go ahead with the repair.
- Repair or replace calculator – whether fixing your current system is the smarter money.
- Service and maintenance – regular servicing prevents most of the faults on this page.
- Air conditioner fault code lookup – all 15 brands in one place.
- All calculators and tools
Call us on 08 8296 7888 or book online and we will call or text you back ASAP.
Sources for this page
Every Kelvinator code above is checked against these Australian documents. Open them yourself to verify anything on this page:
- Kelvinator fault codes (PDF) (arma.org.au)
- kelvinator error codes (compareairconditioning.com.au)
- documenthandler.ashx?file=aHR0cHM6Ly9yZXNvdXJjZS5lbGVjdHJvbHV4LmNvbS5hdS9QdWJsaW (kelvinator.com.au)
- KSD50HWH Kelvinator User Manual (PDF) (appliancesonline.com.au)
- 11a4f09d50834c942571ff4df1d478269dd72834 KSD50HWJ User Manual (PDF) (binglee.com.au)
Kelvinator fault code FAQs
Where do I find the fault code on a Kelvinator air conditioner?
Check the remote or wall controller display first. Some models flash the indoor unit’s lamps in a pattern instead; the table above lists documented lamp patterns alongside their codes. If nothing is showing, the code may only appear while the fault is active.
Can I clear a Kelvinator fault code myself?
You can reset the system by turning it off at the isolator or breaker for five minutes. If the code stays gone, it was a one-off. If it returns, the fault is real and needs a licensed technician, and repeated resets can cause further damage on compressor or refrigerant faults.
Does a Kelvinator fault code mean I need a new air conditioner?
Usually not. Most codes point to repairable faults like sensors, fan motors or drainage. Our fault find gives you an honest verdict either way, and the fee is credited if you repair with us.
Are these Kelvinator fault codes correct for Australian models?
Yes. Every code on this page was checked against Australian documentation (arma.org.au, compareairconditioning.com.au, kelvinator.com.au), not overseas lists, because the same code can mean different things in different markets. Meanings still vary between model series, so treat this page as reference and cross-check your unit’s manual.
Written by Oliver Hastings, T&K Airpower. Last updated 01/08/2026. Compiled from Australian sources including arma.org.au, compareairconditioning.com.au, kelvinator.com.au, appliancesonline.com.au, so you can check every code against the official documentation. Fault code meanings vary between model series and controllers, so treat this page as reference only and never remove panels or work on the refrigeration or electrical parts of the system yourself.
