ErrorKhoj

Blue Star Air Conditioner

Blue Star AC L2 error

Inverter board / power module protection

Needs a technicianReported by one source — verify

Try a reset once. If it comes back, a trained technician should repair it.

We found this meaning in only one secondary source. Confirm it with your user manual or brand customer care before any repair.

What it means

The inverter drive (power module, DC voltage or heat sink) detected a fault and stopped the compressor.

Common causes

  • Voltage spike or unstable supply
  • Outdoor board overheating (poor air flow, very hot day)
  • Failed power module or board parts
  • Compressor wiring problem

Try this at home first

Tick each step as you go

When to call a technician

This needs a trained inverter technician. Users must never open boards or modules.

Safety first

Always switch off at the wall socket or MCB before touching any part. Do not open the outdoor unit, control boards or gas pipes yourself — they carry high voltage and pressure.

Frequently asked questions

What does L2 mean on a Blue Star Air Conditioner?

Inverter board / power module protection. The inverter drive (power module, DC voltage or heat sink) detected a fault and stopped the compressor.

Can I fix Blue Star Air Conditioner error L2 myself?

You can try a reset first: Switch off at the MCB for 10–15 minutes. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with L2?

Avoid repeated restarts; running with this fault can cause more damage.

Other Blue Star AC codes

F4 Outdoor coil (condenser) temperature sensor fault / Communication error (power module ↔ main board) F5 Compressor discharge temperature sensor fault H1 Defrosting (normal) H3 Outdoor unit overheat protection / Compressor overheating H6 Indoor fan motor fault L1 Power supply voltage problem / Inverter board / power module protection L3 Outdoor fan motor fault L4 Current sensor (CT) fault LC Compressor start / rotation fault P1 Power supply voltage problem P2 Outdoor unit overheat protection P3 Overcurrent / compressor overload

All Blue Star Air Conditioner error codes

Sources

We write every explanation in our own words from these references.

Last checked: 2026-10-20