Daikin GYEQ20AN Service Manual page 167

SiAUY361411EA
29
Exhaust Temperature Sensor Disconnected
Sub-code 0: While the unit is running, the following conditions continue for 5 minutes: 1) The engine speed is
Description
of the failure
Exhaust temperature sensor failure; harness failure; main circuit board failure; fuel gas type setting incorrect;
Possible
causes memory switches misconfigured
of the failure
Flow chart
Is Exhaust Temperature
Sensor Operating Normally?
YES
Is Fuel Gas Type
Setting Correct?
YES
If Exhaust Temperature
Sensor Is Not Used, Is Memory
Switch 13-0 Setting Correct?
YES
Check whether sensor
connected properly to Main
Circuit Board's Harness.
Low-Side Pressure Sensor Disconnected/
30
Shorted
Sub-code 0: While the unit is running, the low-side pressure is reported as 5000 kPa (which means that the
Description
of the failure Sub-code 1: While the unit is running, the low-side pressure is reported as 5100 kPa (which means that the
Low-side pressure sensor failure; harness failure; main circuit board failure
Possible
causes
of the failure
Flow chart
Is Low-Side Pressure Sensor
Operating Normally?
YES
Check whether sensor
connected properly to Main
Circuit Board's Harness.
Troubleshooting
equal to or higher than 1400 min
exhaust temperature is equal to or lower than 160°C.
NO
Temperature Sensor.
NO
Configure Main Circuit Board.
NO
Configure Memory Switches.
low-side pressure sensor is shorted).
low-side pressure sensor is disconnected).
NO
Check Low-Side
Pressure Sensor.
-1
; 2) the engine load is equal to or higher than 0.3 MPa; 3) the
Check Exhaust
025897-00E
025898-00E
Flow Charts for Troubleshooting
Error
code
Error
code
J8
J9
156