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39
8
ACTUATOR CONTROL
8-2. R.V. COIL CONTROL (MUZ)
Heating
.................
ON
Cooling
.................
OFF
Dry
....................
OFF
NOTE: The 4-way valve reverses for 5 seconds right before startup 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
Defrost
heater *
Discharge temperature
thermistor
Protection
○ ○
Indoor coil temperature
thermistor
Cooling: Coil frost prevention
○
Heating: High pressure protection
○ ○
Defrost thermistor (MUZ) Heating: Defrosting
○ ○ ○ ○ ○
Fin temperature thermistor Protection
○ ○
Ambient temperature
thermistor
Cooling: Low ambient temperature operation
○ ○ ○
Heating: Defrosting (Heater)
○
Outdoor heat exchanger tem-
perature thermistor
Cooling: Low ambient temperature operation
○ ○ ○
Cooling: High pressure protection
○ ○ ○
*. MUZ-GL•NAH only.
ON
OFF
Compressor
Outdoor fan
motor
R.V.coil
ON
OFF
ON
OFF
<COOL>
5 seconds
<HEAT>
5 seconds
MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA
MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA
MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA
MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA
MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA
OBH733J
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