Samsung AM072BXV Series Service Manual page 311

Test Operation
9-1 Auto Trial Operation (cont.)
9-1-1 Overview of Auto Trial Operation (cont.)
4) Valid temperature range for Auto Trial Operation
To ensure accurate inspection, perform Auto Trial Operation at the indoor and outdoor temperature conditions shown below.
- Auto Trial Operation automatically switches between cooling and heating modes according to the indoor and outdoor
temperatures.
- In the area of deviant crease lines, system protective control may activate during Auto Trial Operation.
Protective control degrades the inspection accuracy.
- Inspection accuracy may decrease if the temperature is outside the valid range or at the threshold.
5) How to perform Auto Trial Operation
(1) How to enter the mode: See the instructions on Key operation modes. (Press and hold the Tact Switch K1.)
- The operation mode automatically changes to cooling or heating mode, according to the indoor and outdoor temp.
- The duration of Auto Trial Operation can vary from 20 min up to two hours, depending on the operation conditions.
- Noise may occur during valve inspection. Check the valve if an abnormal noise persists.
- UP mode automatically turns off as soon as Auto Trial Operation is completed.
(2) If an error occurs during Auto Trial Operation, check the error code and take corrective measures.
- Auto Trial Operation-specific error codes.
(see the error codes and troubleshooting guide in the service manual for other error codes.)
Error code
E503 Ball valve (service valve) locked
E505 Faulty high pressure sensor
E506 Faulty low pressure sensor
(3) After Auto Trial Operation, use the S-NET or S-CHECKER to issue a result report.
- For items indicated as "NG" in the result report, take corrective measures according to the troubleshooting instructions on
NG items in this Manual.
See the service manual if necessary.
- After resolving all the "NG" items, perform Auto Trial Operation again.
- Items indicated as "Unidentified" are not items that have issues.
Some items are not inspected, depending on the installation environment and operation condition.
These items are indicated as "Unidentified".
e.g., If the system is installed with modules and none of the outdoor units operate due to insufficient indoor load,
items related to the outdoor units will not be inspected.
Samsung Electronics
Indoor Temperature (°C)
Description
To resolve NG items, see the troubleshooting instructions on the ball valve.
To resolve NG items, see the troubleshooting instructions on the pressure sensor.
<AM072-240BXV***>
(applicable when the outdoor unit is installed with two or more modules)
Cooling
Heating
Remarks
305