AY-A074E
AY-A094E
AE-A074E
AE-A094E
7. Current control
Defrost start50sec.10sec.50sec. 10sec.
This system, in order to prevent overcurrent during
ON
heating operation, controls the outdoor fan motor andCompressor
changes the indoor fan motor speed by detecting total
OFF
current.ONMAX. 9min.
Reverse
When the current exceeds P2, the outdoor fan motor isValve
OFF
automatically turned off, and when the current falls below
ON
P4, the outdoor fan motor is turned on.
Outdoor
When the current exceeds P3 and the indoor fan speedFan MotorOFF
shifts down because of cold air (5. Preheat air flow), the
ON60sec.
changes in the indoor fan speed shifts up as follows, fromIndoorUL
Fan Motor
"off" to "UL", or from "UL" to "L". And when the current fallsOFF
30sec.
bellow P5, the indoor fan speed shift up is canceled.Preheat Air
Flow Control
AY-AY-
Current transitionFigure Y-12
A074EA094E
P1 5.3A 6.9A
10.Delayed operation of the reverse valve
P2 4.5A 6.1A
When the heat operation is shut down or the operating
P3 4.0A 5.4A
mode is switched from heat to cool or dry, or vice versa,
P4 3.4A 4.6A
Input currentthe reverse valve is switched after 3 minutes.P5 2.6A 4.2A
Time
11.Test run
OutdoorIndoorCompressor
Fan motorFan motorOFFIf the OTEST RUN� button in the unit is pushed during
OFFShift UP
suspension of operation, cool test operation starts. At this
Figure Y-10time, the fan speed is set to OAUTO�.
If this button is pushed during operation, the test operation
8. Freeze preventive
starts in current operation mode. The operation LED (red)
When the indoor pipe temperature falls below -1uC
flickers during test run.
during cool operation or dry operation, the compressor is
In cool and heat mode continuous compressor on
turned off.
operation is performed. In dry mode the operation is in
dehumidifying zone. In fan only mode the indoor fan
9. Defrost
motor runs continusly.
The defrost timer (integrating the operation time of
compressor) counts time with microcomputer during heat
12.Timer
operation.
Frost of outdoor pipe is estimated by indoor pipe12-1 24-HOUR PROGRAMMABLE ON/OFF TIMER
temperature (TH2), room temperature (TH1), indoor fanON-TIMER or OFF-TIMER can be independently
speed and operation state of compressor.programmed. When the unit operates during one
In the defrost operation, first the compressor is turnedhour after the OFF-time is set, thermostat setting
is automatically shifted (+1uC in cool operation and
off, the fan speed is set to OUL� and the outdoor fan motor
is turned off.dry operation, -3uC in heat operation, 16uC - 32uC).
30 seconds later the indoor fan motor is turned off, 50When the ON-timer is set in heat operation and
seconds later the reverse valve is turned off, and 60cool operation, operation starts before 0 to 30
seconds later the compressor is turned on.minutes(depends on the room temperature) so
In the end of defrosting, the compressor is turned off, thethat preset temperature is obtaind at set time.
outdoor fan motor is turned on, 50 seconds later the
reverse valve is turned on, 60 seconds later the12-2 ONE-HOUR TIMER
compressor is turned on, starting heat operation. When ONE-HOUR timer is set, the unit turns off
At this time, the indoor fan motor is turned off or the fanautomatically after one hour. The one hour timer
speed is set to OUL� if preheat air flow function is effective.operation has priority over other time operation,
such as the TIMER ON and TIMER OFF. If the
Switch
ONE-HOUR TIMER button is pressed again during
ONDefrostDefrost
operation, the unit will operate additionally for
another one hour.
HeatingHeatingHeating
Min. Max.Min.Max.
40min.11min.30min.11min.
Figure Y-11
13 |
ACEC
