E154

Event: Operating error of the fan motor on No. XXX indoor unit.
Outdoor unit display: E154 <-> A XXX (XXX = address of indoor unit with error)
Resolution
1. Check hall IC connector that carries out feedback of RPM value.
2. If a fan motor operation capacitor is the control board separating type, check the connection
terminal.
3. Check the operational status of the fan motor.
4. If there is no problem with any of the items above, replace the control board.
Mixed Operation Error (applicable only to heat pump applications with two or more indoor units connected to the system) Controllers will not work with Heat pump Applications, unless Auto changeover has been setup in the VRF SC
• Check the operational mode of outdoor unit or other indoor unit and then stop the operation
of the relevant unit or change its operating mode.
If it is necessary to run an indoor unit in a different operating mode from other indoor
units, stop the indoor units that are running in a different mode.
Reference VRF-SVM046A-EN For Indoor unit electrical motor drawings.
Example for Large Ducted unit that has a separate Fan Board.

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