E32
Toshiba
DC Overvoltage / Undervoltage Protection
Unit displays E32; may be associated with abnormal DC bus voltage on inverter models.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Unstable mains supply, Faulty PFC (power factor correction) circuit, Degraded DC bus capacitors, Loose power connections
How to Fix / Troubleshooting
Safety first: This involves high-voltage DC. Disconnect power and allow several minutes for capacitors to discharge before touching the inverter board.
- Step 1 – Check mains voltage: Have an electrician verify that supply voltage is within Toshiba’s specified range.
- Step 2 – Inspect connections: Tighten all power terminals at the outdoor unit, including incoming supply and compressor connections.
- Step 3 – Visual PCB inspection: Look for bulging capacitors or burnt components on the inverter board.
- Step 4 – Replace inverter PCB: If supply is stable and E32 persists, the inverter PCB (including PFC and DC bus) likely needs replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter Power PCB
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