Toshiba RAV-SM563UT-E Service Manual/Integration page 90

[P12 error]
<Only for 4-way air discharge cassette type models>
Turn off the power.
Are not there connections errors or
disconnection on connectors CN333 and CN334
of indoor unit P.C. board (MCC-1402)?
NO
Remove connectors CN333 and
CN334 of indoor unit P.C. board
(MCC-1402).
Does the fan rotate without trouble
when handling the fan with hands?
YES
Are resistance values between phases
at fan motor connector CN333 motor side of
indoor P.C. board (MCC-1402) correct? *1
YES
Is resistance value of fan motor connector
CN333 at motor side of indoor P.C. board
(MCC-1402) correct? *2
YES
Is signal output of indoor fan motor
position detection correct? *3
YES
Check indoor P.C. board
(MCC-1402).
®
Defect Replace
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YES
NO
NO
1
*
• Are not coil windings between
between
(Black lead) and
5
®
®
• Is not earthed between cabinet and 1, 3, 5
NO
2
*
Check resistance of fan motor position detection circuit.
Is not coil winding between
opened or shorted?
NO
3
*
Check fan motor position detection signal.
• Using a tester, measure the voltage between CN334
indoor P.C. board (MCC-1402) under condition that CN333 and
CN334 are mounted and the power is turned on.
®
Rotate the fan slowly with hands,
and check the pin voltage
swings between 0 to 5V voltage.
• Between
– 90 –
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Correct connection of connector.
1
(White lead) and
3 5
(Red lead) opened or shorted?
1
For resistance, see the following values.
RAV-SM56, SM80, SM1102, SP56, SP80
W
Approx. 70 to 100
RAV-SM1103, SM1403, SP110, SP140
(Yellow lead) and
1
®
Resistance: Approx. 5 to 20k
and : 5V
4 5
Revised : Mar. 2007
Replace indoor fan motor.
Replace indoor fan motor.
(Red lead) and 3 (White lead),
(Black lead), between
®
Approx. 35 to 50
® W
10M or more
Replace indoor fan motor.
(Pink lead)
4
W
Replace indoor fan motor.
1
and
CN333
CN334
Fax: 01823 665807
W
5
of