Mitsubishi Electric M Series Manual page 173

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.
Indoor terminal block
15 mm
35 mm
Lead wire
MSH type
• For future servicing, give extra length to
the connecting wires.
• Make earth wire a little longer than oth-
ers. (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.
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.
WALL-MOUNTED Cooling Only/Fixed Speed Heat Pump
Electrical
VA clamp
cover
Fixing screws
MS type
Indoor/outdoor unit
connecting wire (A)
<MS type> <MSH type>
Indoor terminal block Indoor terminal block
Indoor / Outdoor unit
connecting wire (A)
Outdoor terminal block Outdoor terminal block
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)
Drain
hose
Downward
slope
Soft hose
I.D. 15mm
Fig. 1 Fig. 2
Do not make drain piping as shown below.
Do not raise
Accumulated
drain water
Air
Water Water
Waving
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 horizontal 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 opera-
tion 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.
• If auto restart function is unnecessary, it can be deactivated. Consult the service
representative to deactivate the function. Refer to the service manual for details.
Drain hose
Hard vinyl chloride
70 cm or
pipe I.D. 30mm
more
Insert
securely
Different
diameter joint
Fig. 3
Tip of drain
hose dipped At least
50 mm gap
in water
Water
Ditch
leakage
Emergency
operation switch
(E.O. SW)
C-171