Daikin GYEQ20AN Service Manual page 154

Flow Charts for Troubleshooting
Discharge Temperature Sensor Disconnected/
15
Shorted
Sub-code 0: While the unit is running, the outdoor air temperature is 10°C or higher but discharge
Sub-code 1: Discharge temperature 1 fails to rise above 0°C within 20 minutes after startup (which means
Sub-code 2: While the unit is running, discharge temperature 1 is reported as 201°C (which means that
Description
of the failure
Sub-code 3: While the unit is running, the outdoor air temperature is 10°C or higher but discharge
Sub-code 4: Discharge temperature 2 fails to rise above 0°C within 20 minutes after startup (which means
Sub-code 5: While the unit is running, discharge temperature 2 is reported as 201°C (which means that
Discharge temperature sensor failure; harness failure; main circuit board failure
Possible
causes
of the failure
Flow chart
Are Discharge Temperature
Sensors Operating Normally?
YES
Check whether the sensor is
connected properly to Main
Circuit Board's Harness.
143
temperature 1 fails to rise above 0°C (which means that discharge temperature sensor 1 is
disconnected).
that discharge temperature sensor 1 is disconnected).
discharge temperature sensor 1 is shorted).
temperature 2 fails to rise above 0°C (which means that discharge temperature sensor 2 is
disconnected).
that discharge temperature sensor 2 is disconnected).
discharge temperature sensor 2 is shorted).
NO Check Discharge
Temperature Sensors.
025878-00E
SiAUY361411EA
Error
F6
code
Troubleshooting