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Notes
1. High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service.
2. Do not pull out the connector (CNF1, 2) for the motor with the power supply on.
(It causes trouble of the outdoor multi controller circuit
board and fan motor.)
Self check
Symptom : The outdoor fan cannot rotate.
1
2
Check method of DC fan motor (fan motor/outdoor multi controller circuit board)
Power supply check(Remove the connector (CNF1, 2))
Measure the voltage in the outdoor multi controller circuit
board.
TEST POINT
1
: V
DC
(between 1 (+) and 4 (-) of the fan connector): V
DC
290–330 V DC(When PAM stops), 350 V DC (When PAM is operating)
TEST POINT
2
: V
CC
(between 5 (+) and 4 (-) of the fan connector): V
CC
15 V DC
No
Fail
Fail
Wiring contact check
Contact of fan motor connector (CNF1, 2)
Fuse check
Check the fuse (F500) on outdoor
controller board.
Recover wiring.
Replace outdoor multi controller circuit board.
Replace defective the fan motor.
Replace outdoor multi
controller circuit board.
Replace the fan motor.
Is the voltage normal?
Is there contact failure?
Yes
Yes
No
Did the fuse blow?
No
Yes
Check the operation of fan.
COMPLETE
Yes
OK
Check the operation.
OK
Disconnect the FAN motor connector and
measure the resistance of connector pins.
Refer to “8-6. HOW TO CHECK THE PARTS”.
Replace outdoor multi controller circuit board
(MULTI.B.) and the defective fan motor .
COMPLETE
Inverter
driver
Ground
power supply (inverter drive)
power supply (gate drive)
rotation signal
control voltage
7
6
5
4
-
-
1
3
-
1
CNF1
15 V DC
0–6.5 V DC
0–15 V DC pulse
Motor
TESTS POINT
䐟
V
DC
TESTS POINT
䐠
Vcc
CHECK POINT
+
290–350 V DC
TESTS POINT
䐡
Vsp
PC511
C515
TESTS POINT
䐢
V
FG
C82A
TESTS POINT
䐡
Vsp
TESTS POINT
䐢
V
FG
TESTS POINT
䐠
Vcc
CHECK
POINT
Inverter
driver
Ground
power supply (inverter drive)
power supply (gate drive)
rotation signal
control voltage
7
6
5
4
-
-
1
0–6.5 V DC
0–15 V DC pulse
Motor
TESTS POINT
䐟
V
DC
TESTS POINT
䐡
Vsp
PC512
C516
15 V DC
TESTS POINT
䐠
Voc
C82A
TESTS POINT
䐢
V
FG
TESTS POINT
䐡
Vsp
TESTS POINT
䐢
V
FG
TESTS POINT
䐠
Vcc
CHECK POINT
3
-
1
Multi controller circuit board
Power board
CNDC
C510 F500 CNDC
CNF2
FAN MOTOR (MF1)
FAN MOTOR (MF2)
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Содержание MXZ-4C36NAHZ
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Страница 45: ... 6 2 BRANCH BOX PAC MKA50BC PAC MKA30BC 10ths DIGIT OCH573E ...
Страница 163: ... OCH573E ...