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Mini VRF SYSTEM
Control Functions
(1)
*
(2)
Thermostat OFF
Thermostat ON
20 pulses
20 pulses
20 pulses
Cooling
—
Outdoor unit stopped
Fan
Stop
Outdoor unit operating
MOV position (pulses)
20 pulses
20 pulses
20 pulses
60 – 480 pulses
Performs SH control
65 – 80 pulses
65 – 80 pulses
65 – 80 pulses
60 – 480 pulses
Thermostat ON
—
MOV position (pulses)
Stop
Fan
Heat
Thermostat OFF
accumulation
Control to prevent refrigerant
Control to prevent refrigerant
accumulation
Control to prevent refrigerant
accumulation
Performs SC distribution control
85 pulses
85 pulses
85 pulses
* The target value for SC control is 5 – 20°C for the temperature difference between the pressure
sensor temperature and E1, depending on the operating conditions.
8-1. During Normal Control
During Cooling mode operation
Outdoor unit operating Outdoor unit stopped
The target value for SH control is 2 – 6°C for the temperature difference between E3 and E1,
depending on the operating conditions.
However, the SH target value may increase if the required level decreases. In this case, because the
electronic control valve position moves toward the closed side, you should not assume that there is
insufficient gas.
During Heating mode operation
8. Indoor Unit Electronic Control Valve (Motor Valve) Control
SM830195-04_Mini VRF SYS.indb 14 15/03/10 17:47:35
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