Heat Pump, Split System, Single Service, 3 phase
Maintenance Document 1394-1 41
Clear 20: Inverter error
Hydraulic Unit LED:
Green 6 flashes / Red 3 flashes
Outdoor Unit LED: 18 flashes
Probable causes:
• Connection failure.
• Main PCB failure.
• Inverter PCB failure.
Check:
1. Check connections in control unit:
- Check if the terminal connection is loose.
- Check if connector is removed.
- Check if connector is erroneous connection.
- Check if cable is open.
Upon correcting the removed connector or mis-wiring, reset
the power.
2. Replace Main PCB and Inverter PCB:
If Check Point 1 do not improve the symptom, replace Main
PCB and Inverter PCB.
OK
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