Actuator Control; Outdoor Fan Motor Control; R.v. Coil Control; Relation Between Main Sensor And Actuator - Mitsubishi Electric SUZ-M25VA Technical & Service Manual

9

ACTUATOR CONTROL

SUZ-M25VA.TH
SUZ-M25VA-ET.TH
SUZ-M60VA.TH
SUZ-M60VA-ET.TH

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

9-2. R.V. COIL CONTROL

Heating . . . . . . . . . . . . . . . . . ON
Cooling . . . . . . . . . . . . . . . . . OFF
Dry . . . . . . . . . . . . . . . . . . . . OFF
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
Ambient temperature
thermistor
Outdoor heat exchanger
temperature thermistor
OCH684
SUZ-M35VA.TH
SUZ-M35VA-ET.TH
SUZ-M71VA.TH
SUZ-M71VA-ET.TH
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
Heating: Defrosting
Protection
Cooling: Low ambient temperature operation
Cooling: Low ambient temperature operation
Cooling: High pressure protection
SUZ-M50VA.TH
SUZ-M50VA-ET.TH
15 seconds
NOTE: The 4-way valve reverses for 5 seconds
right before start-up of the compressor.
<HEAT>
5 seconds
Compressor LEV
○ ○
○
○ ○
○ ○
○
○ ○
○ ○
○ ○
23 23
Actuator
Outdoor fan Indoor fan
R.V.coil
motor motor
○ ○ ○
○
○
○
○