Carrier 40VM Series - Troubleshooting from Indoor Unit

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Troubleshooting from Indoor Unit
FE: NO ADDRESS WHEN POWERED ON FOR FIRST TIME
1. Error display:
IDU display: FE
2. Applicable models:
All indoor units
3. Error definition:
No address for IDU
4. Possible causes:
• IDU set as test mode (Dip switch “SW1_1”)
• No address for the IDU
Power off
Power on
Check whether the first dip
switch of IDU main board
SW1 is ON
Error resolved
Switch on the power
again to check whether the
address is set.
Set the IDU addresses within the
range of 0-63#, which must not be
duplicated in one refrigerant system.
YES
Replace the main board of this
indoor unit.
YES
NO
NO
Set the dip switch SW1 as OFF