Error code reference

Daikin Air Conditioner Error Code L4

Radiation fin temperature rise - inverter radiation fin temperature rises abnormally due to defective heat dissipation.

SourceDaikin Air Conditioner - Service Manual: RZR-P, RZQ-P(9) Seriesp. 153

Daikin codes Daikin air conditioner codes

Diagnostic procedure

The full L4 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Check if radiation fin temperature rose to 180°F or more; check connector X111A connection.

SourceDaikin Air Conditioner - Service Manual: RZR-P, RZQ-P(9) Seriesp. 153

Unlock with pass

More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

Unlock L4 procedure $9.95

Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.

Where this code is documented

2 manuals in the MyPros+ library document this code for Daikin air conditioner.

Models covered by the manuals that document this code

More models are covered than are listed here.

75,000+ service documents · 20,000+ error codes · 100+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax

The full L4 procedure

Where this code is documented

Models covered by the manuals that document this code

Related Daikin air conditioner error codes