Suitable For The Model 38Vma***Hds6-1 - Carrier 38VMA Series Service Manual

x. Suitable for the Model 38VMA***HDS6-1
Caution: Turn off the power switch before connecting or disconnecting the connector. Failure to do so could damage
the board.
Switch off the
power
Switch on power
of ODU
Check whether the signal lines from main
board to fan board and between fan boards
are connected or not
YES
Check whether the power cord from the power
circuit of fan board to fan board is connected or not
YES
Check whether the lines from the fan motor to the
fan board is connected or not
YES
Check whether the screws on the IPM of fan board are
tightened or not
YES
Check whether the motor shaft is free or not
YES
Check whether the power supply
of ODU is normal or not
YES
Check whether the CN2 terminal
DC310V power of fan board is normal or not.
Check whether the PN terminal DC650V power of
fan board is normal or not.
YES
Check whether the green indicator LED1
or LED2 of fan board lights up or not
YES
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NO
NO
Reconnect
NO
NO
Tighten screws
on the board
NO
Replace the motor
NO
Ensure proper
power supply
NO
Check and replace
the power of
fan board
NO
Replace the
fan board
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