Samsung AM JXVAF Series Installation Manual page 91

Measure to take when E505, E506 error occurs
Eable vacuum mode on all outdoor units
Is the service valve of the outdoor unit
Is the value on the pressure sensor of
the installed outdoor unit satisfy the
"Max./Min. value difference of low
pressure > 2"
"Max./Min. value difference of high
pressure > 2"
Disable vacuum mode on all outdoor units
When the auto trial operation for pressure sensor was executed before the pressure of the outdoor unit is
eqaulized (when there's close to no difference between high and low pressure), error may occur even though
CAUTION
the product is normal.
If the pressure sensor need to be detected, all outdoor units will display the error.
If the pressure sensor need to be detected, auto trial operation mode will end.
To check for the pressure sensor with the problem, run trial operation for more than 1 hour and analyze the data
to check for a problem.
opened?
Yes
following?
Yes
End
No.
Open the service valve of the outdoor unit
No.
Reset outdoor unit
Run trial operation
Analyze cycle data
Check/replace the abnormal pressure sensor
91