Chigo CMV-50V9A-S, Service Manual

Page: 50 / 50

Fig. 26 the DC motor
The malfunction code:
FC
（ outdoor unit drive fault, start compressor failure ）
Turn off the power
Check the resistance value of the motor each port are normal.
The reference resistance value of motor port.(Vm-GND
∞
、
Vcc-GND 125kΩ
、
Vsp-GND 200kΩ
、
PG-GND ∞)
N
The motor is bad or there
is trouble
in the
circuit. Pls change it
Y
Test the very port resistance value whether the
VCC
Vm is normal(the normal
value:VCC:15Vdc.Vm/P:340Vdc.Vsp:0~5V)
Y
The outdoor PCB is
bad.Pls change it
The motor circuit is bad.
pls change this motor
Turn on the unit
Knock the compressor around by crabstick. Let
the rotor become be loose then turn on it again
and check the compressor whether it is running.
Y
The start-up moment isn’t
enough because of the first
running. This is a normal
Y
Check the contacting wire of compressor whether
it is right or credible
N
Pls contact the wire exactly again
according to picture if there is a
mistake
The component of IPM board is
bad. Pls change it
N
Pls connect the IPM board to the PCB
exactly. Whether is running after turning on.
Y
The wire connecting the IPM board
to the PCB is loose. Pls change the
wire or PCB board.
N
The faulty cause
：
1、 The motor is bad or there is
trouble in the indoor PCB
2
、 The outdoor PCB is bad
The faulty cause:
1
、
The start-up Moment doesn’t reach the
requirement when the compressor runs
firstly.
2 、 The contacting wire of the compressor is
connected wrongly;
3
、 The wire connecting the IPM board to the
PCB is loose
4
、
The component of IPM board is bad.
The reference resistance value of motor
port.(Vm-GND ∞、 Vcc-GND 125kΩ、
Vsp-GND 200kΩ、PG-GND ∞)
N