Test Run; Before Test Run - Mitsubishi Electric SLZ-KA25 Installation Manual

8. Installing the grille
SLP-2ALW (For SLZ-KA·VAL3)
Fig. 8-11

9. Test run

SLP-2ALW (For SLZ-KA·VAL3)
Fig. 9-1
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A Emergency operation switch (heating)
B Emergency operation switch (cooling)
C Operation lamp
8.5. Installing the intake grille (Fig. 8-11)
• Perform the procedure that is described in "8.2. Preparing to attach the grille" in
reverse order to install the intake grille and the corner panel.
A Refrigerant piping of the main unit
B Drain piping of the main unit
C Corner panel
* Installation in any position is possible.
D Position of the levers on the intake grille when sent from the factory.
* Although the clips can be installed in any of four positions.
E Receiver (For SLZ-KA·VAL3)
8.6. Check
• Make sure that there is no gap between the unit and the grille, or between the grille
and the surface of the ceiling. If there is any gap between the unit and the grille, or
between the grille and the surface of the ceiling, it may cause dew to collect.
• Make sure that the wires have been securely connected.

9.1. Before test run

► After installation of indoor and outdoor units, and piping and electric wiring
work, recheck that the unit is free from leaks of refrigerant, loosened con-
nections, and incorrect polarity.
► Measure an impedance between the power supply terminal block (L, N,
on the units and the ground with a 500 V Megger and check that it is equal
to or greater than 1.0 M.
9.2. Test run
9.2.1. For wireless remote controller (Fig. 9-1)
Measure an impedance between the power supply terminal block on the outdoor unit and
the ground with a 500 V Megger and check that it is equal to or greater than 1.0 M.
• Before performing the test run, recheck for any wrong wiring.
Wrong wiring prevents normal operation or results in blown fuse disabling opera-
tion.
• Perform test run in the following procedure.
Procedure
1 Press the button B for more than 3 seconds to start the cooling operation.
If the operation lamp C blinks every 0.5 seconds, inspect the indoor/outdoor
connecting wire for miswiring.
• Check that the vanes operate properly when cool air is blown out.
2 Press it once more, and the operation stops.
3 Press the button A for more than 3 seconds to start the heating operation.
Check that warm air blows out.
• In starting the heating operation, indoor unit fan may not operate to prevent blowing
cool air. Please wait for a few minutes until the temperature of heat exchanger rises
and warm air blows out.
4 Press it once more, and the operation stops.
Checking the remote (infrared) signal reception
Press the ON/OFF button on the remote controller and check that an electronic sound
is heard from the indoor unit. Press the ON/OFF button again to turn the air conditioner
off.
Emergency operation (when wireless remote controller is lost)
The emergency operation can be started by pressing the button B/A (cooling/heat-
ing). When the button is once pressed, the unit will start the emergency operation at
a fi xed temperature setting of 24°C in cooling mode or heating mode.
Note:
• Emergency operation does not stop automatically.
• Although the thermostat is forcibly set to on during the test run, the temperature is
set to 24°C during emergency operation and the thermostat operates according to
the room temperature.
If the indoor unit is operated with the remote controller, both the test run and the
emergency operation are released by commands from the remote controller.
Once the compressor stops, the restart preventive device operates so the compressor
will not operate for three minutes to protect the air conditioner.
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