3-59
Check code
Operation cause
[11]
Indoor fan motor alarm
1. Fan motor circuit connection error
2. Fan motor error
3. Indoor main P.C. board (MCC-1361) failure
4. Indoor motor P.C. board (MCC-1382) failure
NO
NO
NO
YES
OK
YES
NO
NO
YES
Is there no connection error or
disconnection of connector CN33 and CN34 at
indoor motor P.C. board (MCC-1382) side?
Is output of indoor fan motor position
detect signal of the removed connector
CN34 correct at P.C. board side ? (*3)
Modify connection of connector.
Modify connection of connector.
Replace fan motor.
Replace fan motor.
NO
Replace fan motor.
Check indoor main P.C. board (MCC-1361)
or indoor motor P.C. board (MCC-1382).
Failure Replace
Is there no connection error or disconnection
on lead wire between indoor main P.C. board
(MCC-1361) connector CN28 and indoor motor
P.C.board (MCC-1382) connector CN27?
Do resistance values between each
phases match at motor side when removing
fan motor connector CN33 at indoor motor
P.C. board (MCC-1382) side? (
*
1)
When removing connector CN34 which is
provided to detect position of indoor fan motor
at indoor motor P.C. board (MCC-1382) side,
is resistance value between
and
correct
at P.C. board side? (*2)
<For 4-way Air Discharge Cassette type>
(
*
1) Resistance value check between motors
• Aren’t windings open/short between
and
,
and
,
and
→
Resistance should be approx. 75
Ω
to 95
Ω
.
• Doesn’t ground failure occur between cabinet and
,
,
10M
Ω
or more should be applied.
(
*
2) Check of position detect resistance value of indoor fan motor
• Isn’t the resistance between
and
opened or shorted?
→
Resistance value should be between 5k
Ω
to 20k
Ω
.
(
*
3) Fan motor position detect signal check
• Using a tester,measure voltage between
and
→
When turning the fan slowly with hands,voltage between each pins should swing from 0V to 5V.
• Between
and
: 5V
Содержание MMC-P0151H
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