Toshiba RAS-M18SAH-E Service Manual page 38

Block level
Check Check
Block
code
Indoor P .C.
board
Cable
connection
Refrigerant
system
Contents detected by the check codes
supply is turned off. Therefore, contents of operations in the past are all displayed.
Diagnosis function
Symptom
code
Thermo. sensor
(TA) short/break.
Indoor heat
exchanger sensor
(TC) short/break.
Indoor fan lock,
abnormality of
indoor fan.
Abnormality of
other indoor unit
P.C. board.
1) Wrong wiring or
disconnection of
connective cable.
2) Outdoor heat
exchanger
sensor (TE)
short/break.
Compressor break
down.
to
" " "
Table 9-2-4
Air
conditioner
Condition
status
Continued Indicated when
operation detected abnormal
Continued Indicated when
operation detected abnormal
All off Indicated when
detected abnormal
All off Indicated when
detected abnormal
All off Indicated when
detected abnormal
All off Indicated when
detected abnormal
are stored in memory of the microcomputer even if the power
"
– 39 –
Judgment and action
1. Check thermo. sensor.
2. If it is OK, check P.C. board.
1. Check heat exchanger
sensor.
2. If it is OK, check P.C. board.
1. Disconnect the power plug
from AC outlet, and pull out
the connector (CN10) for the
motor, then connect the plug
of AC power cord again and
turn the power on.
2. Check the voltage between
pin 1 and 2 of the connector
(CN10).
3. If the output voltage is 35V,
P.C. board is OK, check
motor.
Replace P.C. board.
1. Check connective cable
correct if wiring is wrong.
2. If connective cable is OK,
check outdoor heat ex-
changer sensor.
1. Check compressor.
2. If it is OK, check P.C. board.