14. Check and test
14-1. Check run
• The check run is a function to screen and detect any wiring errors.
• After carrying out the check run, you can use the automatic wiring correction function to correct
the wiring.
• Normal operation is possible without using the check run. In this case, use the test run or forced
cooling function of the indoor unit to confirm any wiring errors.
Things to confirm before starting the check run
To ensure safety, check that the following work, inspections and operations have been complet-
ed.
Check that all work on the piping connecting the outdoor unit, indoor units has
1
been completed.
Check that all work on the wiring connecting the outdoor unit, indoor units has
2
been completed.
Is there a gas leakage? (At pipe connections [flange connections and brazed
3
areas])
4
Is the system charged with the specified volume of refrigerant?
5
Is a breaker installed at the power supply cable of outdoor unit?
Are the wires connected to the terminals without looseness, and in
6
accordance with the specifications?
7
Is the 3-way valve of the outdoor unit open? (Gas pipe and liquid pipe)
8
Is the power supply connected for more than 12 hours?
Restrictions applicable when performing the check run
• When the check run starts, all indoor units connected to the outdoor unit will start to run automat-
ically. During the check run, you cannot check the operation of the indoor units separately. After
the check run, check the operation of the indoor units separately in normal operation.
• The check run can be used when the temperature is within the operable temperature of the air
conditioner.
• In the check run, the air conditioner will automatically switch between cooling and heating
depending on the external temperature and internal temperature.
• The check run can be completed in about 30 minutes (cooling) or about 1 hour (heating), but may
take more depending on the external and internal temperature conditions etc.
• Do not conduct the check run with all the windows in the room closed.
Otherwise the room temperature could get too low or too high.
• Depending on the difference of the room temperature of each room, a judgment may be impos-
sible.
• Check run is a special operation so there may be a noise louder than the normal refrigerant noise
or a creaking noise.
Check Item
- 243 -
Check Column