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1515
8
ACTUATOR CONTROL
MUZ-FD09NA
MUZ-FD12NA
8-2. R.V. COIL CONTROL
Heating
. . . . . . . . . . . . . . . . .
ON
Cooling
. . . . . . . . . . . . . . . . .
OFF
Dry
. . . . . . . . . . . . . . . . . . . .
OFF
NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.
ON
OFF
ON
OFF
Outdoor fan
motor
Compressor
5 seconds 15 seconds
8-1. OUTDOOR FAN MOTOR CONTROL
The fan motor turns ON/OFF, interlocking with the compressor.
[ON] The fan motor turns ON 5 seconds before the compressor starts up.
[OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.
8-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor Purpose
Actuator
Compressor
LEV
Outdoor
fan motor
R.V. coil
Indoor fan
motor
Discharge temperature thermistor Protection
○○
Indoor coil temperature thermistor
Cooling : Coil frost prevention
○
Heating : High pressure protection
○○
Defrost thermistor
Cooling : High pressure protection
○○
Heating :
Defrosting
○○○○○
Fin temperature thermistor Protection
○○
Outdoor heat exchanger temperature thermistor
High pressure protection
○○○
Ambient temperature thermistor
Low ambient temperature operation
○○○
ON
OFF
Compressor
Outdoor fan
motor
R.V.coil
ON
OFF
ON
OFF
<COOL>
5 seconds
<HEAT>
5 seconds