31
ACTUATOR CONTROL
9
MUZ-GA25VA
MUZ-GA35VA
MUZ-GA25VAH MUZ-GA35VAH
Discharge temperature thermistor
Indoor coil temperature thermistor
Defrost thermistor
Fin temperature thermistor
Ambient temperature thermistor
Purpose
Protection
Cooling : Coil frost prevention
Heating : High pressure protection
Cooling : High pressure protection
Heating : Defrosting
Protection
Cooling : Low ambient temperature operation
Heating : Defrosting (Heater)
Compressor
LEV
Outdoor
fan motor
Indoor
fan motor
Defrost
heater
Solenoid
valve
R.V. coil
Sensor
Actuator
w
1
w
1
w
1
w
1
w
1
w
2
w
1
w
1
MUZ-GA35VA
MUZ-GA35VAH
w
2
MUZ-GA25VA-
E1
/
E2
/
E3
(Serial No. ~6021350T)
MUZ-GA25VAH-
E1
/
E2
/
E3
(Serial No. ~7000000T)
9-3. Relation between main sensor and actuator
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.
ON
OFF
ON
OFF
Outdoor fan
motor
Compressor
5 seconds
15 seconds
ON
OFF
Compressor
Outdoor fan
motor
R.V.coil
ON
OFF
ON
OFF
<COOL>
5 seconds
<HEAT>
5 seconds
ON or OFF
ON or OFF
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.
OB379 C--1qxp 07.2.1 2:25 PM Page 31
