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- 25
3WAY SYSTEM
Control Functions
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6. Indoor Units Control from CCU
Indoor unit fan run in the heating mode is stopped from CCU at the following conditions.
6-3-3. Heating mode
CCU intervenes in drain pump control of the indoor unit according to the setting in EEPROM in the outdoor unit.
The drain pump operates from CCU control at the following conditions.
6-4. Drain pump control
* The DP counter counts Oil Recovery Control and Tube Refrigerant Recovery Control in cooling operation.
* Regardless of operating / stopped.
* To activate this function, it is necessary to set it to EEPROM on the main outdoor PCB.
Discharge air temperature of indoor unit <
_ 20°C
DP counter
Low Silhouette Ducted type indoor unit
In Low Silhouette Ducted types, dirt might be accumulated when water collects in the drain pan for a long period
of time.
Therefore, the drain pump works longer to drain water properly.
5
>
_
Liquid temperature (E1) in the indoor unit which selected cooling mode < 0°C
Liquid temperature (E1) in indoor unit <
_ 20°C
High pressure sensor temperature (HPS) in outdoor unit <
_ 25°C
EEPROM setting in main outdoor unit
CODE: 0C
Indoor unit under this control
All units
(Mode, Operation / Stop
Thermostat ON / OFF
doesn't concern)
changes;
from thermostat ON → thermostat OFF or operation
stopped.
Cooling mode
Dry mode
Heating mode
changes;
from thermostat ON or thermostat OFF → operation stopped.
Invalid
DP operates for 20 minutes and stops for 2 hours
DP operates for 20 minutes and stops for 20 minutes
DP always operates
DP operates for XX minutes when indoor unit's operation
DP operates for XX minutes when indoor unit's operation
Both Setting No. 4 and 5 functions.
Setting No.
0
1
2
3
4
5
6
7
(Factory
preset
mode)
DP operates for XX minutes when indoor unit's operation
changes
from thermostat ON or thermostat OFF → operation stopped.
Cooling mode
Dry mode
*
Types : F1, F2, M1, E1
*
When setting No. 4 – 7 is selected, this function works only for below indoor unit types.
Operating time mentioned “XX” above is able to set in EEPROM of the main outdoor unit.
6-3-2. Dry mode
Indoor unit fan run in the dry mode is controlled from CCU as shown in the below figure.
DTi
+1
Fan speed is “L” when thermostat ON
Fan speed is “LL”when thermostat OFF
Fan speed set by remote controller
DTi = (Intake temperature of indoor unit) - (Preset temperature in remote controller)
SM830226-00̲3WAY ECO-i SYSTEM.in25 25
SM830226-00̲3WAY ECO-i SYSTEM.in25 25
2013/02/13 11:52:26
2013/02/13 11:52:26
