AY-A189E
AY-A249E
7. Current control
Defrost start50sec.10sec.50sec. 10sec.
This system, in order to prevent overcurrent during
heating operation, controls the outdoor fan motor andCompressorON
changes the indoor fan motor speed by detecting totalOFF
MAX. 9min.
current.ON
Reverse
Valve
IWhen the current exceeds P2, the outdoor fan motor is
OFF
automatically turned off, and when the current fallsON
Outdoor
below P4, the outdoor fan motor is turned on.
Fan MotorOFF
When the current exceeds P3 and the indoor fan speed
60sec.ON
shifts down because of cold air (5. Preheat air flow), theIndoor
Fan Motor
OFF
changes in the indoor fan speed shifts up as follows,30sec.
from "off" to "D" to UL". And when the current falls bellowPreheat Air
Flow Control
P5, the indoor fan speed shift up is canceled.
AY-
AY-
Current transitionA189E A249EFigure Y-12
P1 18.0A 22.2A
10.Delayed operation of the reverse valve
P2 13.5A 17.9A
P3 13.0A 18.5AWhen the heat operation is shut down or the operating
P4 12.5A 17.3Amode is switched from heat to cool or dry, or vice versa,
P5 12.3A 16.4Athe reverse valve is switched after 3 minutes.
Input current11.Test run
If the OTEST RUN� button in the unit is pushed during
Timesuspension of operation, cool test operation starts. At
Outdoor
Indoor
Compressor
this time, the fan speed is set to OAUTO�.
Fan motor
Fan motor
OFFIf this button is pushed during operation, the test
OFFShift UP
operation starts in current operation mode. The operation
Figure Y-10LED (red) flickers during test run.
8. Freeze preventiveIn cool and heat mode continuous compressor on
When the indoor pipe temperature falls below -1uCoperation is performed. In dry mode the operation is in
during cool operation or dry operation, the compressordehumidifying zone. In fan only mode the indoor fan
is turned off.motor runs continuously.
9. Defrost12.Timer
The defrost timer (integrating the operation time of
12-1 24-HOUR PROGRAMMABLE ON/OFF TIMER
compressor) counts time with microcomputer duringON-TIMER or OFF-TIMER can be independently
heat operation.programmed. When the unit operates during one
The frost of outdoor pipe is estimated by indoor pipe
hour after the OFF-timer is set, thermostat setting
temperature (TH2), room temperature (TH1), indooris automatically shifted (+1uC in cool operation
fan speed and operation state of compressor.and dry operation, -3uC in heat operation, but,
In the defrost operation, first the compressor is turned16uC set temperature at the lowest).
off, the fan speed is set to OD� and the outdoor fan motorWhen the ON-timer is set in heat operation and
is turned off.cool operation, operation starts before 0 to 30
30 seconds later the indoor fan motor is turned off, 50minutes(depends on the room temperature) so
seconds later the reverse valve is turned off, and 60that preset temperature is obtaind at set time.
seconds later the compressor is turned on.
In the end of defrosting, the compressor is turned off,12-2 ONE-HOUR TIMER
the outdoor fan motor is turned on, 50 seconds later theWhen ONE-HOUR timer is set, the unit turns off
reverse valve is turned on, 60 seconds later the
automatically after one hour. The one hour timer
compressor is turned on, starting heat operation.operation has priority over other time operation,
At this time, the indoor fan motor is turned off or the fansuch as the TIMER ON and TIMER OFF. If the
speed is set to OD� if preheat air flow function is effective.ONE-HOUR TIMER button is pressed again
Switchduring operation, the unit will operate additionally
ONDefrostDefrostfor another one hour.
HeatingHeatingHeating
Min. Max.Min.Max.
40min.11min.30min.11min.
Figure Y-11
15 |
ACEC
