Daikin GYEQ20AN, Руководство по обслуживанию

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Flow Charts for Troubleshooting SiAUY361411EA
155 Troubleshooting
28
High-Side Pressure Sensor System Failure
Error
code
J7
Description
of the failure
Sub-code 0: While the unit is running, high-side pressure 1 is reported as 5000 kPa (which means that high-
side pressure sensor 1 is shorted).
Sub-code 1: While the unit is running, high-side pressure 1 is reported as 5100 kPa (which means that high-
side pressure sensor 1 is disconnected).
Sub-code 2: High pressure SW1 or high pressure SW2 turns OFF immediately before engine startup (which
means that the high-side pressure switch is faulty).
Sub-code 3: While the unit is running, high-side pressure 4 is reported as 5000 kPa (which means that high-
side pressure sensor 4 is shorted).
Sub-code 4: While the unit is running, high-side pressure 4 is reported as 5100 kPa (which means that high-
side pressure sensor 4 is disconnected).
Sub-code 6: While the unit is running, high-side pressure 2 is reported as 5000 kPa (which means that high-
side pressure sensor 2 is shorted).
Sub-code 7: While the unit is running, high-side pressure 2 is reported as 5100 kPa (which means that high-
side pressure sensor 2 is disconnected).
Sub-code 8: While the unit is running, high-side pressure 3 is reported as 5000 kPa (which means that high-
side pressure sensor 3 is shorted).
Sub-code 9: While the unit is running, high-side pressure 3 is reported as 5100 kPa (which means that high-
side pressure sensor 3 is disconnected).
Possible
causes
of the failure
High-side pressure sensor failure; harness failure; main circuit board failure; high-side pressure switch failure;
sub circuit board failure
Flow chart
Which Code Is
Onboard Checker Showing?
If sub-code 0, 1, 3, 4, 6, 7, 8 or 9
If sub-code 2
Is High-Side Pressure Sensor
Operating Normally?
YES
NO
Check High-Side
Pressure Sensor.
Is High-Side Pressure Switch
Operating Normally?
YES
NO
Check High-Side
Pressure Switch.
025896-00EN02
Check whether sensor and
switch connected properly to
Main Circuit Board and Sub-
Circuit Board's Harnesses.