Daikin GYEQ20AN Service Manual page 158

Flow Charts for Troubleshooting
19
Abnormal High-Side Differential Pressure
Sub-code 0: While the unit is running, the currently reported high-side pressure is equal to or higher than 3.1
Description
of the failure Sub-code 1: While the unit is running, the currently reported high-side pressure is equal to or higher than 2.6
MPa and the previously reported high-side pressure is equal to or lower than 1.8 MPa.
Oil se parator clogged; high-side pressure sensor failure, main circuit board failure; stop valve left closed;
Possible
external filter clogged
causes
of the failure
Flow chart
Are Stop Valves Opened?
YES
Is Oil Separator
Operating Normally?
Are Compressor's Discharge-Side
Pipes Free From Clogging?
YES
Is Engine Speed Normal?
YES
Is High-Side Pressure Sensor
Operating Normally?
YES
Check the external filter.
147
MPa and the previously reported high-side pressure is equal to or lower than 2.9 MPa.
NO
Check Stop Valves.
NO
Check Oil Separator.
NO
Check Fuel Control System.
NO
Check High-Side
Pressure Sensor.
Check Mixer.
025882-00E
SiAUY361411EA
Error
FJ
code
Troubleshooting