Panasonic U-16MF2E8 - Indoor Units Control from the CCU

3WAY SYSTEM
Control Functions
1 - 24
1
6. Indoor Units Control from CCU
This device connects the solenoid valve kit which is used to switch between indoor unit cooling/heating for 3-WAY
types.
In case of special controls, solenoid valve kit performs special operation.
For detail, refer to the section “7. Tube Refrigerant Recovery Control, 8. Oil Control, 9. Defrost Control”.
6-2. Solenoid Valve Kit Control [SVK]
6-2-1. SVK of each Indoor Unit Operation Mode
Stop -
Operating *3 (Heating)
*2 (Cooling)
-
Stop -
Operating *3 (Heating)
Operating *2 (Cooling)
Operating -
Stop -
Operating ON
Operating OFF
Stop
Fan
Cooling
Heating
Stop -
Operating ON
Operating OFF
Mode of
indoor unit
Outdoor unit
(system)
Thermostat
ON/OFF
Discharge
valve
(D)
Suction
valve
(S)
Balance
valve
(B)
EP
valve
(E)
OFF OFF ON/OFF *1 OFF
OFF OFF ON OFF
OFF ON ON ON
ON OFF OFF OFF
OFF OFF ON OFF
OFF OFF ON OFF
OFF ON ON ON
ON OFF OFF OFF
OFF OFF ON OFF
OFF ON ON ON
OFF ON ON ON
OFF OFF ON/OFF *1 OFF
ON OFF OFF OFF
ON OFF OFF OFF
Operating OFF *4
OFF OFF OFF OFF
Operating
Operating
*1 When the outdoor unit is stopped, all valves of indoor units’ solenoid valve kit in the heating mode are closed.
Next, when the cooling or heating operation is resumed, the valves will be opened.
*2 Function when a common use solenoid valve kit is used and there are more than one (1) indoor unit in the cooling
mode within the same solenoid valve kit.
*3 Function when a common use solenoid valve kit is used and there are more than one (1) indoor unit in the heating
mode within the same solenoid valve kit.
*4 Only for High Static Pressure Ducted Type Indoor Unit (Type E1)
Checker software shows DSBE as the solenoid valve kit status of “0” and “1” instead of “OFF” and “ON” individually.
0 : OFF
1 : ON
6-3-1. Stop
CCU intervenes in fan control of the indoor unit according to the state at the operating mode below.
The priority order of fan control by CCU is higher than that of indoor unit’s.
In case of special controls, indoor fan performs special operation.
For detail, refer to the section “7. Tube Refrigerant Recovery Control, 8. Oil Control, 9. Defrost Control”.
When the outdoor unit is operating and cooling or heating thermostat ON is changed to OFF, the indoor unit fan
stops after 1 minute drive with air speed “L”.
6-3. Indoor Fan Speed Control
SM830226-003WAYECO-iSYSTEM.in2424SM830226-003WAYECO-iSYSTEM.in2424 2013/02/1311:52:262013/02/1311:52:26