Error 31 (3 Green, 1 Red Flash) — Indoor unit power supply abnormal

What does 31 mean?

The hydraulic unit's green LED flashes three times and the red LED flashes once. This indicates that the power supply to the indoor unit is abnormal or unstable.

• Fluctuations or interruptions in the main power supply.
• Loose electrical connections to the indoor unit.
• An internal electrical fault within the indoor unit's power circuit.

Click steps to track your progress.

1. 1

   Check your home's circuit breaker for the heat pump and reset it if it's tripped.

2. 2

   Ensure the main power supply to the indoor unit is stable and within the specified voltage range.

3. 3

   Inspect the power cable connection to the indoor unit for any looseness or damage.

4. 4

   If other electrical devices on the same circuit are causing voltage drops, try disconnecting them.

5. 5

   If the problem continues, contact a qualified electrician to inspect the unit's internal power components.