110
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 : VDC (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 : VCC (between 5 (+) and 4 (-) of the fan connector): VCC 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 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. END
Yes
OK
Check the operation. END
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 .
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 ① V
DC
TESTS POINT ② Vcc
CHECK POINT
+
290–350 V DC
TESTS POINT ③ Vsp
PC511
C515
TESTS POINT ④ V
FG
C82A
TESTS POINT ③ Vsp
TESTS POINT ④ V
FG
TESTS POINT ② 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 ① V
DC
TESTS POINT ③ Vsp
PC512
C516
15 V DC
TESTS POINT ② Voc
C82A
TESTS POINT ④ V
FG
TESTS POINT ③ Vsp
TESTS POINT ④ V
FG
TESTS POINT ② Vcc
CHECK POINT
3
-
1
Multi controller circuit board
Power board
CNDC
C510 F500 CNDC
CNF2
FAN MOTOR (MF1)
FAN MOTOR (MF2)
· The inverter control P.C. board is built in the fan motor of this outdoor unit.
· When F500 that is on multi controller board is blown, change the fan motor and multi controller board at the same time (F500 is
impossible to change).
· For outdoor unit, there are 2 fan motors (up and down; MF1/MF2), it is possible to connect to either CNF1 or CNF2 on the
board.
· It is abnormal when the abnormality is detected from either both fan motors or only one motor.
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