Service manual

ESIE03–01 Error Codes: Outdoor Units

Part 3 – Troubleshooting 3–55

3.10 Malfunctioning Outdoor Thermistor System (H9)

Error code H9

Error generation The error is generated when the thermistor resistance is out of its range (60ø to 600kø).

Causes The possible causes are:

P Malfunctioning outdoor thermistor

P Malfunctioning outdoor thermistor connector connection

P Malfunctioning outdoor unit PCB.

Troubleshooting To troubleshoot, proceed as follows:

Checking the

thermistor

resistance

See page 3–79.

it connected

properly?

Correct the

connection.

Check the thermistor resistance.

Refer to:

checking the

thermistor resistance

Is it normal?

Replace the

termistor.

Replace the

outdoor unit PCB

Yes

Check the unit

type.

Check the connector

connection of the outdoor

temperature sensor (R1T) on

X4A on the outdoor unit PCB.