Actuator Control; Outdoor Fan Motor Control; R.v. Coil Control; Relation Between Main Sensor And Actuator - Mitsubishi Electric Mr.Slim MUZ-GC25NA - C1 Service Manual

7

ACTUATOR CONTROL

MUZ-GC25NA MUZ-GC35NA MUZ-GC50NA MUZ-GC60NA MUZ-GC71NA

7-1. 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

7-2. 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
<MUZ-GC25/35>
R.V.coil
<MUZ-GC50/60/71>
R.V.coil
Outdoor fan
motor

7-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR

<MUZ-GC25/35>
Sensor
Discharge temperature thermistor
Indoor coil temperature thermistor
Defrost thermistor
Fin temperature thermistor
<MUZ-GC50/60/71>
Sensor
Discharge temperature thermistor
Indoor coil temperature thermistor
Defrost thermistor
Fin temperature thermistor
Ambient temperature thermistor
Outdoor heat exchanger
temperature thermistor
5 seconds
ON
OFF
ON
OFF
<COOL>
5 seconds
ON
OFF
ON
OFF
ON
ON or OFF
OFF
ON
OFF
Purpose
Protection
Cooling : Coil frost prevention
Heating : High pressure protection
Cooling : High pressure protec-
tion
Heating : Defrosting
Protection
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
15 seconds
<HEAT>
5 seconds
ON or OFF
Compressor LEV
○ ○
○
○
○ ○
○ ○
○
Compressor LEV
○ ○
○
○ ○
○ ○
○
○ ○
○ ○
○ ○
23
Actuator
Outdoor fan
R.V. coil
motor
○
○ ○
○
Actuator
Outdoor fan
R.V.coil
motor
○ ○
○
○
○
○
Indoor fan
motor
○
Indoor fan
motor
○