Error code
L4 L4: outdoor-unit air outlet blocked
Applies to 3 models
FTXZ25NV1B, FTXZ35NV1B, FTXZ50NV1B
What this means
The manual's first check for this code is whether the outdoor unit's air outlet is blocked, for example by a parked car or similar object. If the code returns after the obstruction is cleared, the unit needs service.
What you can check yourself
- Switch off the power and remove the obstruction from the outdoor unit's air outlet.
- Switch the power on and start the unit again; if the operation lamp blinks again, note the model name (or the 4-digit check code) and contact a service provider.
Still not resolved? Contact a qualified installer or servicer.
See the official Daikin manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.
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