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Mini VRF SYSTEM
Control Functions
9. Indoor Special Control
Mini VRF SYSTEM
Control Functions
9-3. Indoor Fan Speed Control
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.
9-3-1. Dry mode
Indoor unit fan operated 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)
9. Indoor Special Control
9-3-2. Heating mode
Indoor unit fan operated in the heating mode is stopped from CCU
at the following condition.
- Discharge air temperature of indoor unit
20°C+XX
- High pressure sensor temperature (HPS) in outdoor unit
25°C+XX
- Liquid temperature (E1) in indoor unit
20°C+XX
* "XX" is able to be set in EEPROM on the outdoor unit’s PCB.
EEPROM setting in main outdoor unit
CODE: 2C
Setting No. XX
-10
-9
-8
-10
-9
-8
Interval of “1”
(factory preset mode)
20 20
SM830195-04_Mini VRF SYS.indb 16 15/03/10 17:47:35
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