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Discharge temperature
thermistor
Purpose
Protection
Defrosting
Protection
Defrosting
Control
Control
Protection
Protection
Control
Compressor
LEV
Outdoor
fan motor
Reversing
valve
Sensor
Defrost thermistor
Fin temperature
thermistor
Indoor pipe temperature
thermistor
Capacity code
Evaporation temperature
thermistor
Gas pipe temperature
thermistor
High pressure
switch
Actuator
<Control status>
The control performs when the following status are satisfied everything;
• When there is 1 unit or more not operating indoor unit on heat operation. (Excluding thermo OFF)
• When discharge temperature becomes 107
;
or more.
• When it passed 60 minutes or more since the operation has started or the last refrigerant recovery has controlled.
<Control details>
LEV opening, which adjusts to not operating indoor unit, is considered to be 80 pulse.
<Control finish status>
The control finishes either as follows. However, the LEV opening is considered to be 59 pulse.
• When it passed 60 seconds since the control has started.
• When the discharge temperature is 90
;
or less.
Fan speed is switched according to a number of operating indoor unit and the compressor frequency.
Note
• When operation, fan speed of Hi/ Low mode changes to VHi/ Hi mode by promoting those fan speeds respectively by
1 step after defrosting is operated. This control is cleared, when the compressor off.
• When overheat protection of P.C. board temperature or fin temperature operates, the outdoor fan speed is fixed to VHi
mode regardless of compressor frequency. Also, when the overheat protection is cleared, the fan speed is
back to normal
• When the indoor coil thermistor is 57
;
or more on HEAT operation, fan speed is fixed to Low notch .
Or, the indoor coil thermistor is 45
;
or less on HEAT operation, fan speed is back to normal.
10-6.Refrigerant recovery control on heating
10-7.Outdoor fan control
Relation between main sensor and actuator.
10-8.Relation between main sensor and actuator
COOL
Fan speed
Up
Down
Up
Down
Single
Double
Triple
Mode
HEAT
Indoor unit operation
<Relation between compressor frequency and fan speed.>
55 Hz
45 Hz
60 Hz
50 Hz
50Hz
45 Hz
45 Hz
40 Hz
50 Hz
45 Hz
40 Hz
35 Hz
Up
Down
Fan speed
Hi
Low
Compressor frequency
Min.
Max.
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