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Inspection and check operation
Precautions before check operation
• When the outdoor temperature is low, turn on the main power 3 hours before beginning the
CAUTION
operation.
- If you start the operation immediately after turning on the main power, it may cause serious
damage to the part within the product.
• Do not touch the refrigerant pipe during or right after the operation.
- Refrigerant pipe may be hot or cold during or right after the operation depending on the status
of the refrigerant which flows through the refrigerant pipe, compressor and other parts of the
refrigerant cycle. If you touch the refrigerant during or right after the operation, you may get
burns or frostbite.
• Do not operate the product with its panel or protection nets off.
- There is risk of personal injury from the parts that rotates, heated or with the high voltage.
• Do not turn off the main power immediately after stopping the operation.
- Wait for at least 5 minutes before turning off the main power. If not, water leakage or other
problems may occur.
• Connect all the indoor units and the power supply for the outdoor unit and run auto or manual
address setting. Run auto or manual address setting after changing the indoor unit PCB.
Inspection before check operation
1. Check the power cable and communication cable of the indoor and outdoor unit.
2. Supply power to the outdoor unit 3 hours before check operation to preheat the compressor.
3. Before supplying the power, use a voltmeter and phase tester to check the voltage and the phase.
- R,S,T terminal: check the 380 V ~ 415 V between wires (R-S, S-T, T-R) / 220V~240V between wires (L-N).
4. When the power is supplied, outdoor unit will execute tracking to check the indoor unit connection and
other options.
5. Write down the installation report on the service history report paper attached on the front part of the
control box.
6. Guaranteed range of check operation
For correct judgment, you must perform check operation in below indoor/outdoor temperature condition.
50
40
30
20
10
0
-10
-20
5
10
15
Indoor temperature (°C)
- Check operation selects and operates cooling/heating mode automatically.
- In the temperature range marked with slashed pattern, system protection control may trigger during
operation.(It may be hard to judge the check operation correctly due to protection control operation.)
- When the temperature is outside of guaranteed range, accuracy of judgment on check operation may
decrease near boarder line area.Inspection and check operation.
20
25
30
35
40
45
Cooling
Heating
61
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