7 Commissioning
Checking procedure before the test run
SMGB0091 rev.2 - 11/2015
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7.1 Checking procedure before the test run
When the installation is finished, perform the test run according to the following procedures. After performing the test run,
hand over the system to the customer.
Perform the test run of the indoor units one by one in order.
Make sure that the electrical wiring and the refrigerant piping are correctly connected.
Start the indoor units one by one in order to make sure that the indoor units are correctly numbered.
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D A N G E R
• Do not operate the system until all the check points have been cleared.
• Measure the resistance between the ground and the terminal of the electrical components. Make sure that the electrical
resistance is more than 1 MΩ. Otherwise, do not operate the system until you find the electrical leakage and you repair the
electrical leakage. Do not apply voltage on the terminals for transmission 1 and 2. (*)
• Pay attention to the following items while the system is running.
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Do not touch any of the parts at the discharge gas side with your hands because the compressor chamber and the pipes
at the discharge gas side are hot at a temperature that is higher than 90ºC.
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DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES). If you do, you will cause a serious accident.
•
Do not touch any electrical components for more than three minutes after turning OFF the main switch.
Checking procedure
1
Make sure that the stop valve of the gas line and the stop valve of the liquid line are fully open.
2
Make sure that there is no refrigerant leakage. The flare nuts sometimes loosen because of the vibration during the
transportation.
3
Make sure that the refrigerant piping and the electrical wiring belong to the same system Make sure that the setting of
the unit number of DSW1, DSW6 and RSW1 of indoor units correspond to the system.
4
Make sure that the setting of the DIP switches on the printed circuit board of the indoor units and the RASC units are
correct. Especially, pay attention to the setting of the lift between the indoor units and the RASC units. Refer to the
“4. Electrical and control settings”
5
Make sure that the switch on the main power source has been ON for more than twelve hours in order to warm the
compressor oil by means of the oil heater.
6
Check whether or not the electrical wiring of the indoor units and the RASC units are connected as shown in chapter
“4. Electrical and control settings”
7
Make sure that each wire terminal (L1, L2, L3 and N, or L1 and N for single phase) is correctly connected at the
power source.
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N O T E
•
Make sure that the field-supplied electrical components (main switch fuse, fuse-free breaker, earth leakage breaker, wires, conduit
connectors and wire terminals) have been properly selected according to the electrical data in the technical catalogue of the unit. Also,
make sure that the field-supplied electrical components comply with the national codes and the local codes.
•
Use the shielded cables for the field wiring in order to avoid the electrical noise. (The length of the shielded cable should be less than
1,000 m. The size of shielded cable should comply with the local codes.)
•
Make sure that the terminals for the power supply wiring (“L1” to “L1” and “N” to “N” of each terminal board for AC380-415V. “R” to “R”
and “T” to “T” of each terminal board for AC220V) and the terminals for the intermediate wires between the indoor unit and the RASC
unit (Operating Line: terminals of each terminal board for DC12V) coincide correctly. Otherwise, some components could be damaged.
•
Check to ensure that the crankcase heater is turned ON for more than 4 hours. The operation is not available within 4 hours after
turning ON the power supply.
•
Check to ensure that the main source has been ON for more than 12 hours to warm the compressor oil by the oil heater.