Relocation And Maintenance; Pumping Down - Mitsubishi Electric MXZ-3B24NA Manuel D'installation

4-3. TEST RUN
• Be sure to perform the test run for each unit. Make sure each indoor
unit.
indoor/outdoor unit connecting wires.
About the restart protective mechanism
Once the compressor stops, the restart preventive device operates so the
compressor will not operate for 3 minutes to protect the air conditioner.
Wiring/piping correction function
This unit has a wiring/piping correction function which corrects wiring
dures below.
Make sure that the following is done.
• Power is supplied to the unit.
• Stop valves are open.
Note:
This is not a malfunction.
Procedure
• Correction completes in 10 to 15 minutes. When the correction is com-
the following table.
• To cancel this function during its operation, press the piping/wiring cor-
• When the correction completed without error, do not press the piping/
When the result was "cannot be corrected", press the piping/wiring cor-
• The operation is done while the power is supplied. Make sure not to
• To prevent electronic control P.C. board damage, make sure to per-
form static elimination before operating this function.
• This function does not operate when the outside temperature is 0°C
4-4. EXPLANATION TO THE USER
• Using the OPERATING INSTRUCTIONS, explain to the user how to
use the air conditioner (how to use the remote controller, how to re-
• Recommend the user to read the OPERATING INSTRUCTIONS care-

5. RELOCATION AND MAINTENANCE

5-1. PUMPING DOWN

phere.
2 2
[0 kgf/cm
To start the
2
kgf/cm
To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details.
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
-
-
-
.
WARNING
LED indication during detection:
LED
Lighted Lighted
Result of piping/wiring correction function
LED
Lighted Not lighted Lighted
Blinking Blinking Blinking Cannot be corrected
Refer to "SAFETY PRECAUTIONS
Other indications WHEN LED FLASHES" located
behind the service panel.
Blinking
Result
-
2
[0.5 to 0
9