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(7) If Ch displays on the PCB display after tracking, it is the state of compressor not
preheated, which means the operation is possible after 2 and half hours.
(Supply the power and preheat the compressor).
(8) If the preheating of compressor is completed, the communication is performed
between indoor unit connected and options. It is the normal at the time when the
address on the right display is shown as many as shown on the left side 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 whether all the service valves are open.
(11) Check the high and low pressure through the manifold gauge .
- 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 reciprocate 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 there is not trouble in the power but the problems continues
to occur, check the wire connected to the compressor.
(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.
- Check whether the compressor discharge, condenser outlet temperature, outdoor fan are operated.
(13) During the test operation, check whether error is shown on the
outdoor PCB.
- Test operation shall be continued for more than 2 hours continuously at least.
- After the long initial operation of outdoor unit, check whether the condensate is well treated.
(14) Press again the test button to complete the test operation.
(Operation completion of whole rooms)
(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 the leak of electronic expansion valve. If there is no problem,
put off the indoor unit which is operating and operate another indoor unit to check the electronic expansion
valve leak as in the above manner.
●
Neglect the RCS on the compressor power incoming and check the order of T1-L1(R)-red,
T2-L2(S)-white, T3-L3(T)-black.
DVM E-D/B(chapter5)-E<03759 3/21/02 7:40 PM Page 39