Actuator Control - Mitsubishi Electric Mr.Slim MUZ-FD09NA-U1 Service Manual

8

ACTUATOR CONTROL

MUZ-FD09NA
MUZ-FD12NA
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
Outdoor heat exchanger temperature thermistor
Ambient temperature thermistor
5 seconds
ON
OFF
ON
OFF
<COOL>
5 seconds
ON
OFF
ON
OFF
ON
OFF
Purpose
Protection
Cooling : Coil frost prevention
Heating : High pressure protection
Cooling : High pressure protection
Heating : Defrosting
Protection
High pressure protection
Low ambient temperature operation
15 seconds
<HEAT>
5 seconds
Actuator
Outdoor
Compressor LEV
fan motor
○ ○
○
○ ○
○ ○
○ ○ ○
○ ○
○ ○ ○
○ ○ ○
15 15
Indoor fan
R.V. coil
motor
○ ○