Relocation And Maintenance; Pumping Down - Mitsubishi Electric MSZ-HR25VF Installation Manual

6. RELOCATION AND MAINTENANCE

6-1. REMOVING AND INSTALLING THE PANEL ASSEMBLY
Removal procedure
1) Remove the 2 screws which fix the panel assembly.
2) Remove the panel assembly. Be sure to remove its
bottom end first.
Installation procedure
1) Install the panel assembly following the removal
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.
* D o not hold the A part when installing/remov-
ing or carrying the panel, or the panel might be
damaged.
6-2. REMOVING THE INDOOR UNIT
Remove the bottom of the indoor unit from the instal-
lation plate.
Release both left and right bottom part of indoor unit
and pull it downward and forward as shown in the
figure on the right.
7. CONNECTING THE INTERFACE/CONNECTOR CABLE TO THE AIR CONDITIONER
• Connect the INTERFACE/CONNECTOR CABLE to the Indoor electronic control P.C. board of the air conditioner with the connecting cable.
• Cutting or extending the connecting cable of the INTERFACE/CONNECTOR CABLE results in defects in connecting.
Do not bundle the connecting cable together with power supply cord, indoor/outdoor connecting wire, and/or earth wire. Keep as much distance as possible between the
connecting cable and those wires.
• The thin part of the connecting cable should be stored and placed where customers cannot touch it.
Connecting

6-3. PUMPING DOWN

When relocating or disposing of the air conditioner, pump down the system following
the 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
2) Fully close the stop valve on the liquid pipe side of the outdoor unit.
3) Close the stop valve on the gas pipe side of the outdoor unit almost completely so
4) Start the emergency COOL operation.
To start the emergency operation in COOL mode, disconnect the power supply plug
5) Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure
6) Stop the emergency COOL operation.
Press the E.O. SW several times until all LED lamps turn off. Refer to operating
A part : lower part of air
outlet of the panel
Thin part of the connecting cable.
Place this part where customers cannot touch it.
Air conditioner
Indoor electronic CN105* for INTERFACE
control P.C. board CN104 for CONNECTOR CABLE
1) Remove the panel and the lower right corner box.
2) Open the covers of the Indoor electronic control P.C. board.
3) Connect the connecting cable to CN105* and/or CN104 on the Indoor electronic control P.C. board.
Pass the thin part of the connecting cable through the rib as shown in the figure.
4) Attach the cable clamp provided with Interface to the thick part of the connecting cable with a screw 4×16 as shown in
the figure.
5) Pass the connecting cable through the rib as shown in the figure.
6) Close the covers of the Indoor electronic control P.C. board. Be careful not to catch the thin part of the connecting
cable in the cover. Reinstall the panel and the lower right corner box.
Fix the connecting cable at the prescribed position securely. Incorrect installation
may cause electric shock, fire, and/or malfunction.
pipe side of the outdoor unit.
that it can be easily closed fully when the pressure gauge shows 0 MPa [Gauge] (0
kgf/cm²).
and/or turn off the breaker. After 15 seconds, connect the power supply plug and/
or turn on the breaker, and then press the E.O. SW once. (The emergency COOL
operation can be performed continuously for up to 30 minutes.)
gauge shows 0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm²).
instructions for details.
When the refrigeration circuit has a leak, do not execute pump down with the
compressor.
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
Thick part of the connecting cable
WARNING
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
WARNING