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Troubleshooting
Error Codes Error Description Action
L5 IPM error / IGBT error
1. Check stop valve.
2. Check with inverter checker.
3. Check the power transistor.
4. Check the supply voltage.
5. Check the compressor phase.
6. Check the discharge pressure.
7. Check the installation condition.
L8 Electrical thermal switch Contact dealers for assistance.
L9 Stall prevention
1. Check installation conditions.
2. Check stop valve.
3. Check difference between high and low pressure side.
4. Check continuity on the power transistor.
5. Check the output voltage.
P1 Open phase or voltage unbalance
1. Check LED on outdoor PCB.
2. Check open phase of power supply voltage.
3. Check voltage balance between phases.
P4 Heat sink thermistor short / open Same as H9.
PJ Capacity setting error 1. Check the connection between capacitor and Outdoor PCB.
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