Carrier 38VMA Series Service Manual page 63

Caution:
Turn off the power switch before connecting or disconnecting the connector. Failure to do so could damage
the board.
Switch on the power to check
whether the fan begins to run or not. Check
whether the red indicator LED2 of fan board is
lighted or not
NO
After the fan
YES
runs for ten seconds,
Replace the
check to see if the red
power circuit
indicator LED2 of fan
of fan board
board is lighted or not
NO
whether after the fan
runs for thirty
seconds to one minute,
the red indicator
LED2 of fan board
is lighted and there
is fault P9
NO
Normal
3
NOTE: 208/230V 3Ph 60Hz
NO
check
YES
Replace the
Main board
YES
Replace the
fan board
Switch on the power
to check whether the fan
begins to run or not. See if
the red indicator LED2 of
fan board is lighted or not
1.
2.
1
3.
5
4.
5.
6.
4
* The normal value of output voltage
between P and N terminal on fan module is
DC 310V for 208-230V ODU.
2
6
YES
Replace
the motor
Motor signal feedback port
Power supply indicator lamp
Fan motor U, V, W output port
Error indicating lamp
PCB control signal input port
Program input port
63