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Idiomas disponibles
Idiomas disponibles
Setting content
SW6-1
SW6-2
SW6-3
SW6-4
High static pressure setting
SW6-5
SW6-6
SW6-7
Low-noise mode selection
SW6-8
Selection of Low-noise or Demand
SW6-9
Selection of Diagnostic display or Function
SW6-10
* Do not change the factory settings of SW5-3 through SW5-8.
* Unless otherwise specified, leave the switch to OFF where indicated by "–," which may be set to OFF for a reason.
*1
SW6-5: ON
SW6-4: ON
80 Pa
SW6-4: OFF
30 Pa
*2
SW6-9: ON
LED (round type) No. 0 to 1023
SW6-9: OFF
Function setting No. 0 to 1023
11-3. Operation characteristics in relation to the refrigerant charge
It is important to have a clear understanding of the characteristics of refrigerant and the operation characteristics of air conditioners before
attempting to adjust the refrigerant charge in a given system.
・During cooling operation, the amount of refrigerant in the accumulator is the smallest when all indoor units are in operation.
・During heating operation, the amount of refrigerant in the accumulator is the largest when all indoor units are in operation.
・Refrigerant undercharge creates a tendency for the discharge temperature to rise.
・Changing the amount of refrigerant in the system while there is refrigerant in the accumulator has little effect on the discharge temperature.
・The higher the high pressure level, the more likely it is for the discharge temperature to rise.
・The lower the low pressure level, the more likely it is for the discharge temperature to rise.
・When the amount of refrigerant in the system is adequate, the compressor shell temperature is 10 to 60ºC (50 to 140ºF) higher than the low-
pressure saturation temperature. If the temperature difference between the compressor shell temperature and low-pressure saturation
temperature is 5ºC (41ºF) or less, refrigerant overcharge is suspected.
11-4. Operation check
The following symptoms are normal and do not indicate a problem.
Events
The auto vane automatically switches air flow direction.
The fan speed automatically changes during heating
operation.
The fan stops during heating operation.
The fan keeps running after the unit has stopped.
At the beginning of heating operation, the fan cannot be
manually set.
When the main power is turned on, the display as shown
right appears on the remote controller for about five
minutes.
The drain pump keeps running after the unit has
stopped.
The indoor unit emits noise when switching from heating
to cooling and vice versa.
Immediately after startup, the indoor unit emits the
sound of liquid flowing.
WT09117X05
–
–
–
–
detail setting
SW6-5: OFF
60 Pa
0 Pa
SW6-10: ON
Display on remote
controller
Normal display
Normal display
"Defrost"
No display
"Stand By"
"HO" or "PLEASE
WAIT" blinks.
No display
Normal display
Normal display
Setting
OFF
–
–
–
Refer to *1.
–
Performance priority
Low-noise priority
Low-noise (Night)
Refer to *2.
SW6-10: OFF
LED (7seg) No. 1024 to 2047
LED (7seg) No. 0 to 1023
Cause
The auto vane may switch over to horizontal air flow operation from vertical air flow operation in cooling mode if
the vertical air flow operation has been running for one hour. At defrost in heating mode or immediately after
heating start-up/shutdown, the auto vane automatically switches to horizontal air flow for a short time.
The fan operates at Very Low speed when the thermostat is turned off, and automatically changes over to the
preset speed according to the timer setting or refrigerant temperature when the thermostat is turned on.
The fan remains stopped during the defrost cycle.
After the unit has stopped during heating operation, the fan operates for one minute to exhaust heat.
The fan operates at Very Low speed for five minutes after heating operation starts or until the refrigerant
temperature reaches 35°C (95°F), then the fan operates at Low speed for two minutes, and finally the fan
operates at the preset speed.
The system is starting up. Wait until "HO" or "PLEASE WAIT" stops blinking and goes off then try again.
The drain pump remains in operation for three minutes after the unit in cooling mode has stopped.
The drain pump goes into operation when drain water is detected, even when the unit is stopped.
This is a normal sound of the refrigerant circuit operating properly.
Unstable flow of the heating medium produces a sound. This is temporary and does not imply a problem.
GB-40
ON
–
–
–
Refer to *1.
Before being energized
–
Any time after being energized
Demand
Before being energized
Refer to *2.
Any time after being energized
Switch setting timing
–
–
–
–
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