Toshiba RAS-M18SAH-E Service Manual page 40

9-3-2. Power can not be Turned on after Replacing Indoor P.C. Board
<Checking Procedure>
Connect the AC plug.
Does the OPERATION
lamp blink?
YES
Black
1 2 3 4
Indoor
terminal
block
9-3-3. Outdoor Unit does not Operate
RAS-13SKH-E / RAS-3M31SAH-E-1 (Upper Unit)
Shut off the power supply
from AC outlet once and
turn it on after 5 seconds.
Does the OPERATION lamp blink?
YES
Does the power turn on by
pushing the [START/STOP] button
of the remote control?
YES
Is AC220/230/240V
supplied between terminal block
1 - 2 , 3 - 2 * 1, 4 - 2 ?
YES
Is cable connection
between indoor and outdoor
units correct?
YES
Check items as following procedure
in 9-3-4, 9-3-5, 9-3-6.
NO
White
Blue
N L
Power
terminal
block
NO
NO
NO
* 1 Only Heating mode
NO
Is it wired as shown
in Figure below?
YES
Brown
C02
RY01
P.C. board
See "Power can not be turned on".
See "Power can not be turned on".
Relays (RY01, RY02, RY03, RY04)
or IC31 or IC30 is failure.
Correct cabling between
indoor and outdoor units.
– 41 –
Return the wiring of the
NO
power relay is returned to
the normal procedure.
To the paragraph of
"No Power turns on".
RY02
T02
Replace the
P.C. board.