Carrier 38VMA Series - Page 65

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 begin to run or not. Check to see if the
red indicator LED2 of fan board is
lighted up or not
NO
YES
Switch on the power
to check whether the fan
begins to run. See if the red
indicator LED2 of fan board is
lighted or not
NO
Replace
the motor
YES
Replace the
fan board
After the fan runs for
ten seconds, check
whether the red
indicator LED2 of fan
board is lighted or not
YES
Replace the
Power circuit of
fan board
NO
After the fan runs for
thirty seconds to one
minute, check
whether the red
indicator LED2 of fan
board is lighted and
there is fault P9
YES
Replace the
Main board
NO
Normal
2
4
N
P
3
1
6
5
1. Power supply indicator lamp
2. Fan motor U, V, W output port
3. Error indicating lamp
4. PCB control signal input port
5. Program input port
6. Switching power DC power input
* The normal value of output voltage
between P and N terminal on fan module is
DC 650V for 460V ODU.
65