Daikin Sky Air R-407C - Malfunctioning Discharge Pipe Thermistor System (J3)

Error Codes: Outdoor Units ESIE02–01
3–50 Part 3 – Troubleshooting
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3.9 Malfunctioning Discharge Pipe Thermistor System (J3)
Error code J3
LED indications The table below shows the LED indications.
Error generation The error is generated when the thermistor resistance is out of its range.
Causes The possible causes are:
■ Malfunctioning discharge pipe thermistor
■ Malfunctioning discharge pipe thermistor connector connection
■ Malfunctioning outdoor unit PCB.
Troubleshooting To troubleshoot, proceed as follows:
Operation HAP (green) H1P (red) H2P (red)
Normal 688
Malfunction 677
Check the connector connection of the
discharge pipe temperature sensor (R3T)
on X6A on the outdoor unit PCB.
Is
it connected
properly?
Correct the
connection.
Check the
thermistor
resistance.
Is it normal?
Replace the
termistor.
Replace the
outdoor unit PCB
No
Yes
No
Yes