Daikin FTK-J series Technical Manual page 41

Error Codes Error Description
J6 Outdoor heat exchanger
Electrical box temperature
L3
rise
L4 Heat sink overheat
L5 IPM error/IGBT error
Heat sink thermistor short/
P4
open
1. Restart the system.
2. Check sensor resistance value.
3. Check heat sink temperature and conditions.
4. Check outdoor fan.
5. Check the installation condition.
1. Restart the system.
2. Check the silicon grease condition on heat sink.
3. Check sensor resistance value.
4. Check heat sink temperature and conditions.
5. Check outdoor fan.
6. Check the installation condition.
1. Check stop valve.
2. Check with inverter checker.
3. Check the power transistor and supply voltage.
4. Check the compressor phase.
5. Check the discharge pressure.
6. Check the installation condition.
Action
Same as H9.
Same as H9.
Troubleshooting
39