Test Run; Auto Restart Function; Relocation And Maintenance; Pumping Down - Mitsubishi Electric MSZ-SF25VE3 Installation Manual

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
4-1. PURGING PROCEDURES AND LEAK TEST
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valves are fully closed and covered in caps in initial state.)
2) Connect gauge manifold valve and vacuum pump to service port of stop valve on the
gas pipe side of the outdoor unit.
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Precautions when using the control valve
Service port
A
Control valve
Open
Close Charge hose
Body
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the vacuum pump.
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7) After refrigerant pipes are connected and evacuated, fully open all stop valves on both
sides of gas pipe and liquid pipe. Operating without fully opening lowers the performance
and this causes trouble.
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slowly with liquid refrigerant. Otherwise, composition of the refrigerant in the system may
be changed and affect performance of the air conditioner.
9) Tighten cap of service port to obtain the initial status.
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5. RELOCATION AND MAINTENANCE

5-1. REMOVING AND INSTALLING THE PANEL ASSEMBLY
Removal procedure
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in and using a thin instrument. Then,
remove the horizontal vanes.
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assembly.
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Installation procedure
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procedure in reverse.
2) Be sure to press the positions as indicated by the
arrows in order to attach the assembly completely to
the unit.
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5-2. REMOVING THE INDOOR UNIT
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plate.
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bottom corner part of indoor unit and pull it downward and
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Compound pressure gauge
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Pressure gauge
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Gauge manifold valve
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Charge hose
Stop valve for
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preventing the
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pump with the function to
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the service port, valve core may de-
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valve core is in closed position, and
then tighten part A. Do not tighten
part A or turn the body when valve
core is in open position.
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Upper and
lower vanes

4-2. TEST RUN

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indoor/outdoor unit connecting wire (A) for mis-wiring. After the
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Checking the remote (infrared) signal reception
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4-3. AUTO RESTART FUNCTION

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for details.)
Caution:
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unit to start operation automatically when power supply is resumed.
To the user
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4-4. EXPLANATION TO THE USER
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put the remote controller in the remote controller holder, how to clean, precautions for
operation, etc.).
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5-3. PUMPING DOWN

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procedure below so that no refrigerant is released into the atmosphere.
1) Connect the gauge manifold valve to the service port of the stop valve on the gas pipe
side of the outdoor unit.
2) Fully close the stop valve on the liquid pipe side of the outdoor unit.
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To start the emergency operation LQ &22/ PRGH GLVFRQQHFW WKH SRZHU VXSSO\ SOXJ
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5) Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure
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6) Stop the HPHUJHQF\ &22/ RSHUDWLRQ.
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tions 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.
This product is designed and intended for use in the residential, commercial and
light-industrial environment.
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO
100-8310, JAPAN
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operation switch
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