Actuator Control - Mitsubishi Electric Mr.Slim MUZ-A09NA Service Manual

8

ACTUATOR CONTROL

MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA MUZ-A24NA
MUY-A15NA MUY-A17NA MUY-A24NA MUZ-GA24NA MUY-GA24NA
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(MUZ)
Heating . . . . . . . . . . . . . . . . . ON
Cooling . . . . . . . . . . . . . . . . . OFF
Dry . . . . . . . . . . . . . . . . . . . . OFF
NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.
ON
Compressor
OFF
<MUZ-A09/12/15/17>
ON
R.V.coil
OFF
<MUZ-A24,MUZ-GA24>
ON
R.V.coil
OFF
ON
Outdoor fan
OFF
motor
8-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
<MUZ-A09/12/15/17, MUY-A15/17>
Sensor
Discharge temperature thermistor Protection
Indoor coil temperature thermistor
Defrost thermistor
Fin temperature thermistor
Ambient temperature thermistor
<MUZ-A24, MUY-A24, MUZ-GA24, MUY-GA24>
Sensor
Discharge temperature thermistor Protection
Indoor coil temperature thermistor
Defrost thermistor (MUZ)
Fin temperature thermistor
Outdoor heat exchanger temperature High pressure protection
Ambient temperature thermistor
5 seconds
ON
OFF
ON
OFF
<COOL>
5 seconds
ON or OFF
ON or OFF
Purpose
Cooling: Coil frost prevention
Heating: High pressure protection
Cooling: High pressure protection
Heating: Defrosting
Protection
Cooling: Low ambient temperature operation
Purpose
Cooling: Coil frost prevention
Heating: High pressure protection
Defrosting
Protection
Cooling: Low ambient temperature
operation
15 seconds
<HEAT>
5 seconds
ON or OFF
ON or OFF
Compressor LEV
○ ○
○
○ ○
○ ○
○ ○
○
○ ○
Compressor LEV
○ ○
○
○ ○
○ ○
○
○ ○
○ ○
37
Actuator
Outdoor fan
R.V. coil
motor
○ ○
○
○
Actuator
Outdoor fan
R.V. coil
motor
○ ○
○
○
○
Indoor fan
motor
○
Indoor fan
motor
○