Daikin GYEQ20AN Service Manual page 155

SiAUY361411EA
16
Abnormal Engine Room Temperature
Sub-code 0: At least two of the following conditions are true: 1) Any of intake air temperature sensors 1, 2, 3,
Description
of the failure
Engine room overheated/burned; intake air temperature sensor failure; oil temperature sensor failure;
Possible
causes main circuit board failure
of the failure
Flow chart
Is There Any Trace Of Engine Room
Having Reached Abnormally High Temperature
Due to Combustion or Other Reason?
YES
Are Intake Air And
Oil Temperature Sensors
Operating Normally?
YES
Check whether the sensor is
connected properly to Main
Circuit Board's Harness.
17
Short of Refrigerant
Sub-code 0: The low-side refrigerant pressure is detected equal to or lower than 0.05 MPa just before startup.
Description
of the failure
Low-side pressure sensor failure; refrigerant leak
Possible
causes
of the failure
Flow chart
Is Low-Side Pressure Sensor
Operating Normally?
YES
Is Sensor Connected
Properly To Main Circuit
Board's Harness?
YES
There Are Refrigerant Leaks.
Check And Repair Any Leaks.
Troubleshooting
4 and 5 reports a temperature higher than 100°C and
2) any of oil temperature sensors 1 and 2 reports a temperature higher than 130°C.
Make sure the burnout
NO
position and please contact
your Daikin representative.
NO
Check Intake Air And
Oil Temperature Sensors.
NO
Check Low-Side
Pressure Sensor.
NO Check Electrical
025879-00E
Wiring System.
025880-00E
Flow Charts for Troubleshooting
Error
code
Error
code
F7
F9
144