Samsung AM080 XV Series Service Manual page 274

10) Main EEV
Inspection item : Main EEV of Outdoor Unit.(Auto Trial Operation : Heating only )
Error code: None (The resulting report "Undetermined")
Determine the Main EEV operation status of the each Outdoor Unit.
If the judgment of Main EEV is "Undetermined" : Checking in accordance with the following order.
Auto Trial Operation results,
is Valve and Pressure sensor normal?
Is Main EEV connector normal?
Is Main EEV coil normal?
(Resistance, wire breaking, operation
impossible, etc.)
Is PCB Output signal normal?
Replace Main EEV
9-1-4 Auto Trial Operation Error Code
Division
Dedicated Error Code
Other error codes : Refer to Service Manual.
Samsung Electronics
Yes
Yes
Yes
Yes
Complete
※ Main EEV coil resistance value based (Measured temperature is 20°C)
Main EEV Coil
Error Code
E503
E505 High pressure sensor breakdown
E506 Low pressure sensor breakdown
No
No
No
No
Operating
Voltage
(VDC)
Description
Service Valve is closed
Check the Valve and Pressure sensor.
Confirmation and Measures
Replace Coil
Replace Hub PCB
Resistance of
between the
phase (Ω)
Remark
Refer to "Service Valve"
Refer to "High / Low pressure sensor
(Module installed)"
Test Operation
9-13