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172
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Model
Item
Units: rps
402
502
602
802
1002
Outdoor unit
Maximum required speed
Minimum required speed
90
40
302
95
20
105
40
115
40
100
30
120
30
Model
Item
Units: rps
402
502 602
802
1002
Outdoor unit
Maximum required speed
Minimum required speed
90
40
302
88
20
105
40
105
40
100
30
120
30
(n) Low voltage protection control
If a power supply voltage of 176 V or lower is detected while the compressor is stopped, or if a power supply voltage of 176
V or lower is detected for 3 minutes during compressor operation, the compressor is stopped.
(o) Test
operation
1) It is possible to operate the outdoor unit using SW9 and SW5-4 on the outdoor unit PCB.
SW5-4
SW9
ON
OFF
Cooling test operation
Heating test operation
After pressing
continuously
for 1 second
Test operation is ended by pressing SW9 (SW2) during test operation.
Remote control unit settings, display contents
Capacity
Mode
Cooling operation
Heating operation
The initial setting temperature is 5ºC.
The initial setting temperature is 30˚C.
2) Test operation control
a) Operates the air conditioner at the predetermined maximum speed for each model.
b) Each protective control and anomalous sensing control is activated.
c) If SW5-4 is switched back during test operation, stop control is implemented and the cooling and heating operations
are toggled.
d) Remote control unit settings and displays during test operation
♦
Models FDCVA302 ~ 1002
(a) Deciding the compressor speed
The indoor unit’s return air temperature ad the set temperature are used to carry out fuzzy calculations, then the required
speed is decided. After that compressor speed adjustment by any protection control is taken into account, the actual compres-
sor speed is decided.
Unit required speed
(i) Dehumidify and cooling operation
(ii) Heating operation
(b) Compressor start control
At the point when compressor operating conditions are established, the control in either item (i) or item (ii) is executed.
( i ) The fi rst time the compressor starts after the power is turned ON, or when the operating mode is the same as the operat-
ing mode the previous time the compressor ran, the compressor starts 5 seconds after the compressor ON conditions are
established. However, in the case of models 802 and 1002, the bypass solenoid valve (SV2) goes ON, then the compressor
starts 5 seconds later.
(ii) If the mode is changed from the previous operating mode, the 4-way valve is switched 10 seconds after the compressor’s
ON conditions are established, then 10 seconds after that, the compressor starts. However, in the case of models 802
and 1002, after the 4-way valve switches, the bypass solenoid valve (SV2) goes ON, then 10 seconds after that, the
compressor starts.
(c) Compressor soft start control
(i) Compressor protective start
I
1) Control
conditions
Normally, in this start pattern, the compressor’s operating frequency is increased.
2) Control
content
a) The compressor is started at Arps as target speed. But if outdoor air temperature (Tho-A) is above 35°C in cool-
ing or dehumidifying operation or if indoor suction temperature (Thi-A) is above 25°C in heating operation, the
compressor is started at Crps as target speed.
