e1
Moderate
Daikin · Mini-Splits & Ductless Systems
Outdoor PCB Defective
Quick Answer
Error code E1 on your Daikin Mini-Splits & Ductless Systems means: Outdoor PCB Defective. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Power cycle the system at the circuit breaker and wait 60 seconds before restoring
2
Inspect the outdoor PCB for visible damage including burn marks, swollen capacitors, or corrosion
3
Check the input voltage to the outdoor unit (should be 208-230VAC +/- 10%)
4
If error persists after power cycle, the outdoor PCB needs replacement
5
Outdoor PCB replacement requires a licensed HVAC technician with Daikin training
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Outdoor PCB assembly
PCB cover gasket
Mounting hardware
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