Actuator Control - Mitsubishi Electric MUZ-GA35VA-E3 Service Manual

9

ACTUATOR CONTROL

MUZ-GA25VA MUZ-GA35VA
MUZ-GA25VAH MUZ-GA35VAH
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
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
9-3. Relation between main sensor and actuator
Sensor
Discharge temperature thermistor
Indoor coil temperature thermistor
Defrost thermistor
Fin temperature thermistor
Ambient temperature thermistor
5 seconds
ON
OFF
ON
OFF
<COOL>
ON
OFF
ON
ON or OFF
OFF
ON
OFF
Purpose
Compressor
Protection
Cooling : Coil frost prevention
Heating : High pressure protection
Cooling : High pressure protection
Heating : Defrosting
Protection
Cooling : Low ambient temperature operation
Heating : Defrosting (Heater)
15 seconds
<HEAT>
5 seconds
ON or OFF
Actuator
Outdoor
LEV
fan motor
w
1
w
1
w
1
w
1
w
1
w
MUZ-GA35VA
1
MUZ-GA35VAH
w
MUZ-GA25VA-
2
MUZ-GA25VAH-
31
5 seconds
Indoor
R.V. coil
fan motor
w
1
(Serial No. ~6021350T)
/ /
E1 E2 E3
(Serial No. ~7000000T)
/ /
E1 E2 E3
Defrost Solenoid
heater valve
w
2