Actuator Control - Mitsubishi Electric MUZ-DM25VA Service Manual

9

ACTUATOR CONTROL

MUZ-DM25VA MUZ-DM35VA
9-1. 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
9-2. R.V. COIL CONTROL
R.V. COIL CONTROL
Heating . . . . . . . . . . . . . . . . . OFF
Cooling . . . . . . . . . . . . . . . . . ON
Dry . . . . . . . . . . . . . . . . . . . . ON
NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.
Compressor
R.V.coil
Outdoor fan
motor
9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor
Discharge temperature thermistor
Indoor coil temperature thermistor
Defrost thermistor
Fin temperature thermistor
OBH751
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
15 seconds
<HEAT>
5 seconds
Compressor LEV
○ ○
○
○
○ ○
○ ○
○
20
Actuator
Outdoor fan Indoor fan
R.V. coil
motor
○
○ ○
○
motor
○