Daikin GYEQ20AN Service Manual page 169

SiAUY361411EA
32
Pressure Sensor Failure
Sub-code 0: While the unit is stopped, the following conditions continue for 20 seconds: 1) High-side pressure
Sub-code 1: While the unit is stopped, the following conditions continue for 20 seconds: 1) High-side pressure
Description
of the failure
Sub-code 2: While the unit is stopped, the following conditions continue for 20 seconds: 1) High-side pressure
High/low-side pressure sensor failure; main circuit board failure; EV failure
Possible
causes
of the failure
Flow chart
Is Low-Side Pressure Sensor
Operating Normally?
YES
Is High-Side Pressure Sensor
Operating Normally?
YES
Is EV3 Operating Normally?
YES
Check whether sensor
connected properly to Main
Circuit Board's Harness.
Troubleshooting
1 minus the low-side pressure is equal to or higher than 170 kPa; 2) high-side pressure 1 is
equal to or lower than 3300 kPa; 3) the low-side pressure is equal to or lower than 3300 kPa.
1 minus high-side pressure 2 is equal to or higher than 170 kPa; 2) high-side pressure 1 minus
the low-side pressure is lower than 170 kPa; 3) high-side pressure 1 is equal to or lower than
3300 kPa;
4) the low-side pressure is equal to or lower than 3300 kPa.
1 minus high-side pressure 3 is equal to or higher than 170 kPa; 2) high-side pressure 1 minus
the low-side pressure is lower than 170 kPa; 3) high-side pressure 1 is equal to or lower than
3300 kPa;
4) the low-side pressure is equal to or lower than 3300 kPa.
NO Check Low-Side
Pressure Sensor.
NO
Check High-Side
Pressure Sensor.
NO
Check EVs.
025900-00E
Flow Charts for Troubleshooting
Error
code
JH
158