Toshiba RAS-M18SAH-E Service Manual page 41

RAS-10SKH-E-1 x 2 / RAS-M18SAH-E
RAS-10SKH-E-1 x 2 / RAS-3M31SAH-E-1 (Lower Unit)
RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E
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
Is outdoor heat exchanger
sensor (TE) normal?
YES
MCC-738 MAIN P.C. board
CN09-RY01 3 , and/or,
CN010-RY02 3
220/230/240 VAC?
YES
Check items as following procedure
in 9-3-4, 9-3-5, 9-3-6.
NO
NO
NO
* 1 Only Heating mode
NO
NO
NO
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.
Replace sensor
MCC-738 is defective.
– 42 –
Replace the
P.C. board.