Daikin GYEQ20AN, Руководство по обслуживанию

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SiAUY361411EA Flow Charts for Troubleshooting
Troubleshooting 150
22
Indoor Unit Electronic Expansion Valve Failure
Error
code
H6
Description
of the failure
Sub-code 0: During cooling operation, the following conditions continue for 20 minutes: 1) SHS1 is equal to or
lower than 2°C; 2) SHS2 is equal to or lower than 2°C; 3) the high-side pressure minus low-side
pressure is equal to or higher than 1000 kPa.
Possible
causes
of the failure
Indoor unit temperature sensor failure; indoor unit electronic expansion valve failure;
high/low-side pressure sensor failure; intake air temperature sensor failure; harness failure;
main circuit board failure; indoor unit filter/heat exchanger fouled; refrigerant overcharged
Flow chart
Is Indoor Unit
Electronic Expansion Valve
Operating Normally?
YES
NO
Check Electronic
Expansion Valve.
Are Indoor Unit Filter
and Heat Exchanger
Free From Dirt?
YES
NO
Check Indoor Unit Filter
and Heat Exchanger.
Check Indoor Unit
Temperature Sensors.
Check Electrical
Wiring System.
Check High/Low-Side
Pressure Sensor.
Check Intake Air
Temperature Sensors.
Check Discharge
Temperature Sensors.
Are Indoor Unit
Temperature Sensors
Operating Normally?
YES
NO
Are Sensors Connected
Properly To Main Circuit
Board's Harness?
YES
NO
Is High/Low-Side Pressure
Sensor Operating Normally?
YES
NO
Are Intake Air Temperature
Sensors Operating Normally?
YES
NO
Are Discharge Temperature
Sensors Operating Normally?
NO
YES
025888-00EN03
Check whether Refrigerant is
not overcharge.