Test Operation (Read Operation Manual As Well); Separating The Top And Bottom Of The Unit - Mitsubishi Electric CITY MULTI PFD-P250VM-E Manuel D'installation

9. Test Operation (read OPERATION MANUAL as well)

• After completing installation of the indoor and outdoor units, piping, and wiring, check the power supply, and check for refrigerant leaks, wiring mistakes, loose transmis-
sion lines, and incorrect polarity.
• Using a DC500 V Mega, check that the resistance between the power supply terminal block and earth is 1.0 MΩ or more. Do not operate if this resistance is less than
1.0 MΩ.
* Do not measure the resistance of transmission lines.
• Refer to the following Test Run Procedure.
• Check functions as follows when using external I/O.
Test Run Procedure
Turn main power supply on before 12 hours or more.
→ Ready for operation in approximately one minute. Leave for 12 hours or more (with outdoor unit compressor crankcase heater ON).
1 Set Normal/Local switch of indoor unit to local.
2 Start test run by the remote controller.
→ Check that the indoor fan and outdoor unit operate normally.
→ Check for piping and wiring mistakes.
3 Stop the unit by the remote controller.
→ Test run complete.
4 Set indoor unit Normal/Local switch of indoor unit to Normal.
→ Check that the Normal/Local switch is set to Normal after test run.
Notes: 1 An error code will be appeared on the remote controller if the Fault lamp on the indoor unit is lit during test run. Refer to the Outdoor Units Installation Manual for
details of error codes.
2 Set DIP SW5 - 4 to ON if operation cannot be continued at low-load during test run. Always set DIP SW5 - 4 to OFF after completing test run (change the switch
setting only while power is OFF).
• Check functions as follows when using external I/O.
• External input function check
Item Operation details
Start/Stop Operate from external input.
1
• External output function check
Item Operation details
Operate (Stop) air-conditioner
1 Operation status
from remote controller.
2 Fault Stop air-conditioner at fault.

10. Separating the top and bottom of the unit

The top and the bottom of the unit can be separated. (Requires brazing)
When separating the top and the bottom of the unit, perform the work on a level
surface.
Follow the procedures below when separating the sections.
Necessary tools and materials:
• Ratchet wrench with a socket size of 17 mm (for M10)
• General tools
• Cable ties (for wires)
• Gray vinyl tape (for pipes)
• Supporting wood piece Height 800 mm x Width 100 mm x Thickness 20 (mm)
1 piece
(1) Removing the decoration panel and filter
<Model 250>
• Remove the front panels (2), rear panels (2), and the side panels (2) in this
order by removing the hinges and the screws on the unit as shown in [Fig.10.0.1].
• Open the filter cover and remove the filters (2 filters).
<Model 500>
• Remove the front panels (4), rear panels (3), and the side panels (2) in this
order by removing the hinges and screws on the unit as shown in [Fig.10.0.1].
• Open the filter cover and remove the filters (3 filters).
(2) Disconnecting the electric wires
• Disconnect the wiring connectors from the remote controller, thermistor, float
switch, clamp, and linear expansion valve as shown in [Fig.10.0.2].
• After removing the connectors, pull out the wires from the control box.
• Unclamp the wires from the frame.
• Put all wires together in a bundle on the unit.
(3) Removing the drain hose and the pipes from the brazed section of the pipe
• Remove the drain hose by unscrewing the screws on both ends of the hose
band.
• Peel off the pipe cover on the pipe so that the torch flame will not reach the
cover. Remove the pipe from the brazed section as shown in [Fig.10.0.3].
* Protect the section around the area to be worked on from the torch flame
(drain pan, wiring, insulation material on the frame etc).
Operation procedure
Check details
Air-conditioner operates or stops.
Remote controller display changes.
Check details
Device connected to output terminal
responds.
Check specified number air-
conditioner.
(4) Separate the top and the bottom of the unit
Unscrew the screws and loosen bolt 1 that are marked with the letter A in
•
[Fig.10.0.1] (on four corners) Loosen bolt 2 loose enough to allow the top and
the bottom of the unit to be separated. Be sure to re-tighten bolt 2 after sepa-
rating the top and bottom (Tightening torque: 74N·m).
Separation work is now complete. Exercise caution not to damage or scratch the
unit during transportation or get your fingers caught between the units.
[Fig. 10.0.1] (P.7)
<Dimensions and weight of parts>
Heat exchanger
unit (top)
Fan unit
(bottom)
Decoration
panel
* Length of protruded pipe (removable)
[Fig. 10.0.2] (P.7)
Measures required
• Check connection of Start/Stop input terminal.
• Check SW1 - 10 are OFF.
• Check SW3 - 8 are ON.
• Check the Normal/Local switch is set to Normal.
Measures required
• Check connection of output terminal.
<A> Model 250
<B> Model 500
A Filters (2) B Filter cover
C Side panel: 14 screws D Front panel: 6 screws
E Front panel: 2 chains F Rear panel: 9 screws
G Rear panel: 8 screws H Filters (3)
I Rear panel: 7 screws on each J Front panel: 2 hinges on each
K Bolt 1 L Bolt 2
M Screw
Height (mm) Width (mm)
1120+510 P250:1380
*1 P500:1980
P250:1380
860
P500:1980
—
—
<A> Model 250
<B> Model 500
A Linear expansion valve wiring B Clamp
C Remote controller wiring D Lamp wiring
E Thermistor wiring Float switch wiring
Depth (mm) Weight (kg)
P250:158
780
P500:246
P250:128.5
780
P500:159
P250:93.5
—
P500:115
15