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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
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.
9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor Purpose
Actuator
Compressor
LEV
Outdoor fan
motor
R.V.coil
Indoor fan
motor
Discharge temperature
thermistor
Protection
○○
Indoor coil temperature
thermistor
Cooling: Coil frost prevention
○
Heating: High pressure protec-
tion
○○
Defrost thermistor Heating: Defrosting
○○○○○
Fin temperature thermistor Protection
○○
Ambient temperature
thermistor
Cooling: Low ambient tempera-
ture operation
○○○
Outdoor heat exchanger tem-
perature thermistor
Cooling: Low ambient tempera-
ture operation
○○○
Cooling: High pressure protec-
tion
○○○
ACTUATOR CONTROL
9
MUZ-GE25VA MUZ-GE25VAD MUZ-GE33VA MUZ-GE35VA MUZ-GE35VA2 MUZ-GE35VAD
MUZ-GE42VA MUZ-GE42VAD MUZ-GE50VA MUZ-GE50VA2 MUZ-GE50VAD
MUZ-GE60VA MUZ-GE60VAD MUZ-GE71VA MUZ-GE71VAD
MUZ-GE80VA MUZ-GE80VA2 MUZ-GE80VAD
OBH532E