Actuator Control - Mitsubishi Electric MUZ-JP09WA-U1 Service Manual

8

ACTUATOR CONTROL

MUZ-JP09WA MUZ-JP12WA
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.
Compressor
Outdoor fan
motor
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.
Compressor
R.V.coil
Outdoor fan
motor
8-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor
Discharge temperature thermistor
Indoor coil temperature
thermistor
Defrost thermistor
Fin temperature thermistor
Ambient temperature thermistor
Outdoor heat exchanger temperature
thermistor
OBH821A
5 seconds
ON
OFF
ON
OFF
<COOL>
5 seconds
ON
OFF
ON
OFF
ON
OFF
Purpose
Protection
Cooling: Coil frost prevention
Heating: High pressure protec-
tion
Heating: Defrosting
Protection
Cooling: Low ambient tempera-
ture operation
Heating: Defrosting (Heater)
Cooling: Low ambient tempera-
ture operation
Cooling: High pressure protec-
tion
15 seconds
<HEAT>
5 seconds
Compressor LEV
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18
Actuator
Outdoor fan Indoor fan
R.V. coil
motor motor
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