Samsung MIM-B18 User Manual page 24

Control and Monitoring (Continued)
4
Set operation mode limit.
 You can select 'Cool only(Fan, Cool)', 'Heat only(Fan, Heat)' and 'No limits'.
- Cool only (Fan, Cool): If cooling only indoor unit operates in heat mode, indoor
- Heat only (Fan, Heat): If heating only indoor unit operates in cool mode, reset the
- No limits: You can use cooling only and heating only with no limits.
- Ex: If the cooling only indoor unit (with Fan mode set as alternative operation
mode) operates in heating mode, DMS2 will detect it and reset the indoor unit
in Fan mode.
Note  Operation mode limits setting is not available in ERV.
 Mixed operation can occur regardless of operation mode limits setting.
 If indoor unit with operation mode limit is in mixed operation, DMS2 solves
mixed operation status automatically by controlling the indoor unit in set
operation mode.
 In the following circumstances, all indoor units under the same outdoor unit
should be set to the same operation mode limits. Mixed operation can occur
continuously when you set some of indoor unit to cool only and the other to heat
only.
- If the centralized controller is MCM-A202 and is in group mode
- If the centralized controller is in group mode and the interface module is
MIM-B13 or MIM-B04A
 Except above  circumstances, DMS2 changes the operation mode limit of all
indoor units under the same outdoor unit to same operation mode limit.
- If the centralized controller is in group mode and is above MCM-A202A and all
the interface modules under the centralized controller are above MIM-B13A
- If the centralized controller is in individual mode
 If you set the cooling only indoor unit's operation mode limit to heating only,
DMS2 may display Heating  Cooling alternately.
24
E-
unit operation will be reset to the alternative operation
mode.
indoor unit as set operation mode.