Toshiba ras-m16g3dv-e Service Manual page 70

(3) Only the indoor motor fan does not operate
<Primary check>
1. Is it possible to detect the power supply voltage (AC220–240V) between 1 and 2 on the terminal block?
2. Does the indoor fan motor operate in cooling operation?
(In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turnedon, to
prevent a cold air from blowing in.)
Power off.
Is not
connection error or
disconnection on the connector
CN210 of indoor unit
P.C. board?
Disconnect the connector CN210 to
the indoor P.C. board
Does the
fan turn smoothly when
turned by hand?
Is each
resistance value
on the motor side of the
fan motor connector CN210
of the indoor P.C.
board correct?
Is F01 of the
indoor P.C.
board open?
Is R04 or R05
of the indoor P.C.
board open?
NO
YES
NO
NO
YES
NO
Model name for the indoor fan motor.
ICF-340WD94-3,
ICF-340WD94-1, CF-340WD94-2, ICF-340WD139-1
<Checking procedure>
Measure the resistance of the following terminals with the tester.
YES
Internal motor circuit is damaged if the measured value is out of
the range in below table.
Pin No.
Color
Measure by connecting the com side to 4 (Black) while measuring.
The measurement may vary.
I. Between 4 (Black) - 1 (Red)
II. Between 4 (Black) - 5 (White)
III. Between 4 (Black) - 6 (Yellow)
IV. Between 4 (Black) - 7 (Blue)
[Action if the measurement is out of the range]
If any measurement in the above table is between 0 to several 100 Ω,
replace the indoor P.C. board together with the motor since the
indoor P.C. board is damaged.
YES
NO
YES
7 6 5 4
Blue Yellow White Black
Measurement place
– 69 –
Repair the connector
connection.
Replace the indoor
fan motor.
Replace the indoor
fan motor.
3 2 1
- - Red
Resistance value
a, b, c
∞ (MΩ)
35k – 65kΩ
130k – 170kΩ
∞ (MΩ)
Replace the indoor
P.C. board.
Replace the indoor
P.C. board.
Check the indoor
P.C. board.
→
If faulty Replace