Samsung MR-DH00 Technical Data Book page 144

Control Systems
External control system
V V
2. Multi tenant function controller
MCM-C210N
6) Main fucntion
Multi tenant function controller operation
When AC power (that is supplied to indoor unit) is cut-off, it supplies auxiliary power (DC 12 V, DC 5 V) to the indoor unit.
When AC power (that is supplied to indoor unit) is supplied normally, it cuts-off the auxiliary power (DC 12 V, DC 5 V) to the indoor unit.
Detail information of the indoor unit when the power is supplied by MTFC
Item
Indoor unti operation
EEV control
Self error diagnosis
Displaying error on panel
display
Oepration of the connected
wired remote controller
Input outdoor unit key mode
(Test run)
Controlliing
from the control device
Setting option code
Recognition of MTFC status
Beep
When AC single phase power is normally supplied to indoor unit
Indoor unit operates normally.
Caution
Wired remote controller for group control cannot be installed to an indoor unit which Multi Tenant Function controller was installed.
EEV operation of the stopped Heat mode will be controlled in same condition as noise reduction control option when
Multi Tenant Function Controller operates.
If the Multi Tenant Function Controller operates while multiple indoor units are working in mixed operation mode
(cooling and heating at the same time), dew may form on the indoor unit fan.
144
Operation
OFF Remain indoor unit in off status, turning on is not possible
Close Operation off, follows indoor unit's EEV control
Operating Detects error such as EEV close/open by executing self-diagnosis
Case 1) The errors of itself : it displays.
Display partially
Case 2) The errors of the other units : it doesn't display.
OFF
All off All LEDs is off
Not operating The others are operated except the indoor unit in MTFC mode
Not operating Remain off status, turning on is not possible
Option setting from wireles remote controller, wired remote controller
Not operating
Not operating -
Detail information