Mitsubishi Electric M Series Manual page 171

M series
CONNECTING WIRES FOR INDOOR UNIT
You can connect indoor/outdoor lead wire without removing the front panel.
1) Open the front panel.
2) Remove one screw holding the electrical cover, then remove the cover.
3) Remove VA clamp.
4) Pass indoor/outdoor unit connecting wire (A) from the back of the indoor unit and proc-
ess the end of the wire.
5) Loosen terminal screw, and connect first the earth wire, then indoor/outdoor unit con-
necting wire (A) to the terminal block. Be careful not to make mis-wiring. Fix the wire
to the terminal block securely so that no part of its core is appeared, and no external
force is conveyed to the connecting section of the terminal block. Firmly tighten the
terminal screws to prevent them from loosening. After tightening, pull the wires lightly
to confirm that they do not move.
6) Secure indoor/outdoor unit connecting wire (A) and the earth wire with the VA clamp.
Never fail to hook the left claw of the VA clamp. Attach the VA clamp securely.
15 mm
35 mm
Lead wire
MSH type
(COOL & HEAT)
• For future servicing, give extra
length to the connecting wires.
• Make earth wire a little longer than
others. (More than 35 mm)
• Do not fold the excess wire, or cram
it into small space. Take caution not
to damage the wires.
Note: Do not place the wires
between the indoor unit and the
installation plate (1). Damaged wire
could cause heat generation or fire.
HOW TO SWITCH OVER MS TYPE/MSH TYPE AND AUTO RESTART
FUNCTION <INDOOR ELECTRONIC CONTROL P.C. BOARD>
The details of SW2
SW2-
sets up AUTO RESTART
FUNCTION ON/OFF.
SW2-
switches over MS type/MSH type.
When the units are shipped from
the factory, SW2 is set up as below.
sw
2
SW2- : AUTO RESTART
FUNCTION ON
SW2- : MSH type
1 2
(1) How to switch over to indoor unit MS type/outdoor unit
MU&MUX type.............................................. SW2-
(2)
How to switch over to indoor unit MSH type/outdoor unit
MUH&MXZ type ........................................... SW2-
(3) How to release the AUTO RESTART FUNCTION
..................................................................... SW2-
HOW TO SWITCH OVER MS TYPE/MSH TYPE
<REMOTE CONTROLLER>
The details of SLIDE SWITCH
Pull out the upper lid.
Set the SLIDE SWITCH in the battery place with a pen tip as shown in the table
below. The switch is set up for "COOL & HEAT (Left side)", when the units are
shipped from the factory.
COOL & HEAT
(MSH / MUH & MXZ Type)
HOW TO SWITCH
H C
OVER MS TYPE/
MSH TYPE
Put the two batteries (AAA) in the place.
Fix the upper lid.
Press the reset button with a thin instrument.
RESET button
WALL-MOUNTED Cooling Only/Fixed Speed Heat Pump
Electrical cover
Indoor terminal block
VA clamp
Fixing screws
MS type
Indoor/outdoor unit
(COOL ONLY)
connecting wire (A)
<MS type> <MSH type>
Indoor terminal block Indoor terminal block
MSC
MU
& MUX
Indoor / Outdoor unit
connecting wire (A)
Outdoor terminal block Outdoor terminal block
F11
L101
LD105
FRONT
CN202
IC101
sw
1
sw
2
: upside
1 2
sw
2
: downside
1 2
sw
2
: upside
1 2
COOL ONLY
(MS / MU & MUX Type)
H C
SLIDE SWITCH
H C
C
H
CONNECTING WIRES FOR OUTDOOR UNIT
1) Open the service panel.
2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire (A) from
the indoor unit correctly on the terminal block. Be careful not to make mis-wiring. Fix
the wire to the terminal block securely so that no part of its core is appeared, and no
external force is conveyed to the connecting section of the terminal block.
3) Firmly tighten the terminal screws to prevent them from loosening. After tightening,
pull the wires lightly to confirm that they do not move.
4) Connect power supply cord (K).
5) Fix indoor/outdoor unit connecting wire (A) and power supply cord (K) with the cord
clamp.
6) Close the service panel securely.
Terminal block
15 mm
35 mm
Lead wire
Drain Piping
• If the extension drain hose has to pass through a room, be sure to wrap it with com-
mercially sold insulation.
• The drain hose should point downward for easy drain flow. (Fig. 1)
• If the drain hose provided with the indoor unit is too short, connect it with drain hose (I)
that should be provided at your site. (Fig. 2)
• When connecting the drain hose to the hard vinyl chloride pipe, be sure to insert it
securely into the pipe. (Fig. 3)
MSC
MUH Downward
slope
& MXZ
Fig. 1
Do not make drain piping as shown below.
Do not raise
Water Water
leakage leakage
TEST RUN (Heat operation is MSH type only.)
1) Insert power supply plug into the power outlet and/
or turn on the breaker. Check that all LED lamps
are not lit. If they are blinking, check that the hori-
zontal vane is installed correctly. Refer to operating
instructions for details.
2) Press the E.O. SW once for COOL, and twice for
HEAT operation. Test run will be performed for 30
minutes. If the upper lamp of the operation indicator
blinks every 0.5 seconds, inspect the indoor/outdoor
unit connecting wire (A) for mis-wiring. After the test
run, emergency mode (set temperature 24ºC) will
start.
3) To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer
to operating instructions for details.
Checking the remote (infrared) signal reception
Press the ON/OFF button on the remote controller (6) and check that an electronic sound is
heard from the indoor unit. Press the ON/OFF button again to turn the air conditioner off.
• Once the compressor stops, the restart preventive device operates so the compressor
will not operate for 3 minutes to protect the air conditioner.
AUTO RESTART FUNCTION
This product is equipped with an auto restart function. When the power supply is stopped
during operation, such as during blackouts, the function automatically starts operation in
the previous setting once the power supply is resumed. (Refer to the operating instruc-
tions for details.)
Caution:
• After test run or remote signal reception check, turn off the unit with the E.O. SW or
the remote controller before turning off the power supply. Not doing so will cause the
unit to start operation automatically when power supply is resumed.
To the user
• After installing the unit, make sure to explain the user about auto restart function.
• Make earth wire a little longer
than others. (More than 60 mm)
• For future servicing, give extra
length to the connecting wires.
Indoor/outdoor unit
connecting wire (A)
Power supply cord (K)
Cord clamp
Drain hose
Drain
Hard vinyl chloride
hose
70 cm or
pipe I.D. 30 mm
more
Soft hose
Insert
I.D. 15 mm
securely
Different
diameter joint
Fig. 2 Fig. 3
Accumulated
Tip of drain
drain water
hose dipped
Air in water
Water
Waving
leakage
Power supply
cord (K)
At least
50 mm gap
Ditch
Emergency
operation switch
(E.O. SW)
C-169