Specifications

71
OUTDOOR UNIT CONTROL8
8-1. COOL operation
Control mode
mode Function
RemarksControl
Compressor
Thermostat
Thermostat starts or stops by the signal of the set temperature and room
temperature from the indoor unit.
(Detecting method depends on indoor unit.)
Outdoor
fan control
Normal
Outdoor fan rotation frequency depends on the outdoor condenser temper-
ature (TH6)
• Rotation frequency control : Pulsation control
• Rotation frequency : Output step N=0, 6~15 (Output voltage=0~230V)
• Condenser temperature range: 20˚C ~ 50˚C
• Compressor starting :When the compressor restarting, the outdoor fan is
locked for 2 minutes of initial step.
Target control
Temperature
30°C~40°C
Normal control
LEV opening should be controlled to become the SC level of the target at
regular intervals, according to the detection temperature of thermistors
installed in the heat exchanger of the condenser.
W The target, SC level is different according to the capacity, the type of
the indoor unit, and the operating state. (Normal: 4~10˚C)
W The SC level are calculated as follows;
COOL : TH6–TH3
Others
1Outdoor fan stops (Output step=0) during the compressor OFF.
2When compressor started operating, fix the initial step for two minutes.
3When the SW5-1 in the outdoor controller p.c.board set to ON, the outdoor
fan output is always locked to 16. (100% output)
LEV control
Indoor frost pre-
vention
[Operating condition]
When there is at least 1 indoor unit which has changed to frost prevention
mode, the compressor will stop. After stop the compressor when the frost
prevention mode is released, the compressor will restart.
[Time chart]
3 minutes
or more
Indoor unit
Frost prevention
Normal
ON
OFF
Compressor
Temperature adjustment decides
as to whether compressor stops.
The condition
that prevents
indoor unit from
freezing up is
subject to the
operational con-
dition of indoor
unit.
By means of outdoor Condenser/ Evaporator temperature thermistor
(TH6), adjust the condensing temperature at 30-40:. When anti-freezing
control is reactivated, however, adjust the condensing temperature at 40-
45:.
Desired
condensing
temperature
Fan’s
output
step
TH6 [˚C]
TH6<0
0[TH6<8
8[TH6
9
11
14
Unit is controlled at one-minute intervals.
Desired subcooling degree: 4-10˚C (It depends on each model and the
operating condition.)
Pulse width: ±30 pulse at the maximum
Opening at upper and lower limit
P1
P1.6
P2
P2.5
500
600
700
800
330
360
240
300
P3
P4
P5
P6
800
1500
1200
1500
330
440
540
550
Model Upper limit Lower limit Upper limit Lower limitModel
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