Indoor Unit Electronic Control Valve (Motor Valve) Control - Panasonic U-4LE1E5 Service Manual

8. Indoor Unit Electronic Control Valve (Motor Valve) Control

INDOOR UNIT
8-1. During Normal Control
(1) During Cooling mode operation
1
Stop
Fan
Thermostat OFF
Cooling
Thermostat ON
* 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.
(2) During Heating mode operation
Stop
Fan
Thermostat OFF
Heat
Thermostat ON
* 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.
MOV position (pulses)
Outdoor unit operating
20 pulses
20 pulses
20 pulses
60 – 480 pulses
Performs SH control
MOV position (pulses)
Outdoor unit operating
Control to prevent refrigerant
65 – 80 pulses
accumulation
Control to prevent refrigerant
65 – 80 pulses
accumulation
Control to prevent refrigerant
65 – 80 pulses
accumulation
60 – 480 pulses Performs SC distribution control
1 - 14
Mini VRF SYSTEM
Control Functions
Outdoor unit stopped
20 pulses
20 pulses
20 pulses
—
Outdoor unit stopped
85 pulses
85 pulses
85 pulses
—