Daikin GYEQ20AN, Руководство по обслуживанию

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Flow Charts for Troubleshooting SiAUY361411EA
145 Troubleshooting
18
Compressor Oil Detected Too Low
Error
code
FH
Description
of the failure
Sub-code 0: An empty oil separator has been detected.
Sub-code 2: While oil separator heating control is being performed, SH01 or SH02 whichever is lower stays
equal to or lower than 5°C for 40 minutes.
Sub-code 3: SH01 or SH02 whichever is lower stays equal to or lower than 10°C for 5 minutes, or stays equal
to or lower than 5°C for 2 minutes, or stays equal to or lower than 2°C for 10 seconds after 10
minutes or longer have elapsed after startup.
Possible
causes
of the failure
Compressor oil leak; compressor failure; oil return pipe clogged; high-side pressure sensor failure;
low-side pressure sensor failure; intake air temperature sensor failure; discharge temperature sensor failure;
oil temperature sensor failure; SV failure; main circuit board failure; outdoor/indoor unit EV failure;
check valve failure; four-way valve failure; refrigerant overcharged; indoor unit fan failure; heater failure;
indoor unit filter/heat exchanger fouled; power supply failure; refrigerant recharging incorrect;
energization time too short; power-ON start/power-OFF stop; BS unit failure
Flow chart
Is Unit Free From
Compressor Oil Leaks?
YES
Is High-Side Pressure Sensor
Operating Normally?
YES
Are Compressors Operating
Normally? Is There Sufficient
Refrigerating Machine Oil In
Compressor Case?
YES
Are Intake Air Temperature
Sensors Operating Normally?
YES
Is Low-Side Pressure Sensor
Operating Normally?
YES
NO
Check Low-Side
Pressure Sensor.
NO
Check High-Side
Pressure Sensor.
NO
Check Compressor Oil Leaks.
Is SV Operating Normally?
YES
NO
Check SVs.
Are Oil Temperature Sensors
Operating Normally?
YES
Is EV operating Normally?
NO
Check EVs.
YES
NO
Check Oil Temperature
Sensors.
NO
Check Compressors.
Check Oil return Pipe.
NO
Check Intake Air
Temperature Sensors.
Make sure that the indoor unit is
free from communication pipe
clogging and refrigerating machine
oil accumulation.
Please take care with the tele
controller connection.
025881-01E01
When Sub-code is 0
Check Discharge
Temperature Sensors.