Samsung Electronics DVM Series Technical Manual page 222

(8) If the preheating of compressor is completed, and communication is occurring
between the indoor units connected. It is normal for the address on the right to
be shown matching on left hand display.
(9) Check through the PC connected with outdoor unit whether the data is correct
from temperature sensor and electronic expansion valve.
(10) Once the above process is all completed, press the test operation button on PCB.
- Check before pressing key that all the service valves are open.
(11) Check the high and low pressure by using the S-net or a manifold gauge.
- Use the S-net for RVMC060H1M0(1) model and use a manifold gauge for the other models.
- Refer to the pressure table separately provided as per the outdoor temperature and piping length.
- Since the high pressure and low pressure varies at the initial operation, take the input data 20 minutes
after the start of compressor at least.
- Since the compressor may operate if there is loud noise or if the low and high pressure do not vary,
check the power L1(R)-L2(S)-L3(T) from (1). If the power connections are correct but the problem continues
to occur, check the wire connected to the compressor.
Neglect the RCS on the compressor power incoming and check the order of cables.
- Three phase : T1-L1(R)-red
- Single phase : T1-R-red
(12) Check through the PC connected to the outdoor unit.
- Check the temperature, RPM, power and opening of electronic expansion valve for each indoor unit.
The proper opening of electronic expansion valve when under the air cooling operation:
Between 250 and 160 step when the outdoor temperature is 95°F. (The lower the outdoor
air temperature, make lower the opening of electronic expansion valve would be larger.)
The proper opening of electronic expansion valve when under the air heating operation:
Between 1100 and 700 step when the outdoor temperature is 45°F. (The lower the outdoor
air temperature, make lower the opening of electronic expansion valve would be smaller.)
- Check whether the compressor discharge, condenser outlet temperature, outdoor fan are operating.
(13) During the test operation, check whether error is shown on the outdoor PCB.
- Test operation shall be continued for more than 2 hours at a minimum.
- After the initial operation of outdoor unit, check whether the condensate formed is being drained.
(14) Press the Reset button to complete the test operation.
(Now check the indoor units)
(15) If the test operation mode is completed, operate one indoor unit only in
cooling mode.
- The operation shall be continued for more than 30 minutes for one unit and then check the temperature
of indoor unit connected through PC to check for leaks of electronic expansion valve. If there is no problem,
switch off the indoor unit which is operating and operate another indoor unit to check the electronic expan-
sion valve leak in the above manner.
T2-L2(S)-white T3-L3(T)-black
T2-S-white T3-C-black
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