HYS-4.6LV-AUG1 (AS4777-2 2020)

This warranty covers defects in materials and workmanship for 5 years. It excludes damages from improper installation, modifications, or environmental factors such as extreme temperatures.

AI-summarised from the manufacturer warranty document. Always confirm against the linked PDF before relying on it for a claim.

Coverage shape

Pro-rata — value reduces with age

If you sell the home

Transfers to the next homeowner

What voids it

Non-accredited installations, unauthorized modifications, failure to follow installation and safety instructions

Environment limits

High temperatures causing derating, relative humidity above 95%, direct exposure to corrosive substances

Showing 23 of 23. The official install manual is the authoritative source — always confirm before acting.

• ARC_FAULTcriticalCall your installer

  Manual (PDF)

  Arc Fault

  Likely cause

  Detected arc in the wiring.

  What to do

  Check wiring for damage and ensure proper connections.

• BATTERY_REVERSE_CONNECTIONcriticalCall your installer

  Manual (PDF)

  Battery Reverse Connection

  Likely cause

  Battery wiring is incorrect.

  What to do

  Verify battery polarity connections immediately.

• ISOLATION_FAULTcriticalCall your installer

  Manual (PDF)

  Isolation Fault

  Likely cause

  Insulation impedance too low.

  What to do

  Measure insulation resistance and rectify.

• OVER_TEMPERATUREcriticalCall your installer

  Manual (PDF)

  Over Temperature

  Likely cause

  Internal temperature exceeds limits.

  What to do

  Ensure proper installation and ventilation; check for fan faults.

• PV_REVERSE_CONNECTIONcriticalCall your installer

  Manual (PDF)

  PV Reverse Connection

  Likely cause

  PV strings are connected with reverse polarity.

  What to do

  Disconnect DC switch and correct polarity when necessary.

• RELAY_FAULTcriticalCall your installer

  Manual (PDF)

  Relay Fault

  Likely cause

  Relay self-check failure.

  What to do

  Restart inverter and contact support if issue persists.

• BATTERY_VOLTAGE_FAULTwarningCall your installer

  Manual (PDF)

  Battery Voltage Fault

  Likely cause

  Battery voltage exceeds limits.

  What to do

  Ensure battery input voltage is within the normal range.

• BMS_BATTERY_ALARMwarningCall your installer

  Manual (PDF)

  BMS Battery Alarm

  Likely cause

  Battery fault detected from BMS.

  What to do

  Restart battery; contact the manufacturer if fault persists.

• BMS_BATTERY_FAULTwarningCall your installer

  Manual (PDF)

  BMS Battery Fault

  Likely cause

  Battery fault detected from BMS.

  What to do

  Restart battery; contact the manufacturer if fault persists.

• BMS_COMMUNICATION_FAULTwarningCall your installer

  Manual (PDF)

  BMS Communication Fault

  Likely cause

  Error in BMS communication.

  What to do

  Check BMS communication cable and reconnections.

• EPS_LOAD_OVERPOWERwarningCall your installer

  Manual (PDF)

  EPS Load Overpower

  Likely cause

  Load exceeds EPS capacity.

  What to do

  Reduce EPS load.

• Grid Overvoltagewarning

  Manual (PDF)

  The grid voltage is higher than the permissible range.

  Likely cause

  Grid voltage exceeds specifications.

  What to do

  Wait for grid to recover; if frequent, check voltage settings and contact support.

• Grid Undervoltagewarning

  Manual (PDF)

  The grid voltage is lower than the permissible range.

  Likely cause

  Low grid voltage conditions.

  What to do

  Monitor grid voltage; if persistent, check connection and contact support.

• GRID_OVERFREQUENCYwarningCall your installer

  Manual (PDF)

  Grid Overfrequency

  Likely cause

  The grid frequency is higher than the permissible range.

  What to do

  Monitor and ensure grid frequency is stable. Contact support if issue persists.

• GRID_OVERVOLTAGwarningCall your installer

  Manual (PDF)

  Grid Overvoltage

  Likely cause

  The grid voltage is higher than the permissible range.

  What to do

  Generally, the inverter will reconnect to the grid after the grid recovers. If the alarm occurs frequently, check the safety country setting and ensure grid voltage stability.

• GRID_UNDERFREQUENCYwarningCall your installer

  Manual (PDF)

  Grid Underfrequency

  Likely cause

  The grid frequency is lower than permissible limits.

  What to do

  Ensure grid frequency stability and consult support if persistent.

• GRID_UNDERVOLTAGwarningCall your installer

  Manual (PDF)

  Grid Undervoltage

  Likely cause

  The grid voltage is lower than the permissible range.

  What to do

  The inverter will reconnect to the grid after recovery. Check safety setting, grid voltage stability, and AC cable connections if the alarm persists.

• METER_COMMUNICATION_FAULTwarningCall your installer

  Manual (PDF)

  Meter Communication Fault

  Likely cause

  Failure in communication with the meter.

  What to do

  Inspect communication cable and connections.

• METER_REVERSE_CONNECTIONwarningCall your installer

  Manual (PDF)

  Meter Reverse Connection

  Likely cause

  The meter or CT is reversely connected.

  What to do

  Check installation instructions for correct setup.

• NO_GRIDwarningCall your installer

  Manual (PDF)

  No Grid

  Likely cause

  The inverter has detected no grid connection.

  What to do

  Check grid supply reliability and connection integrity.

• PV_OVERVOLTAGEwarningCall your installer

  Manual (PDF)

  PV Overvoltage

  Likely cause

  PV voltage higher than permissible range.

  What to do

  Verify specifications of PV modules connected.

• PV_UNDERVOLTAGEwarningCall your installer

  Manual (PDF)

  PV Undervoltage

  Likely cause

  PV voltage is lower than the permissible range.

  What to do

  Inspect DC cable connections and module conditions.

• RESIDUAL_CURRENT_FAULTwarningCall your installer

  Manual (PDF)

  Residual Current Fault

  Likely cause

  High leakage current.

  What to do

  Reduce humidity in the environment. Check insulation if alarm persists.