AY-A184E
AY-A244E
AE-A184E
AE-A244E
7. Current control
Defrost start50sec.10sec.50sec. 10sec.
This system, in order to prevent overcurrent during
heating operation, controls the outdoor fan motor andON
Compressor
changes the indoor fan motor speed by detecting total
OFF
current.MAX. 9min.ON
Reverse
IWhen the current exceeds P2, the outdoor fan motor isValve
automatically turned off, and when the current falls belowOFF
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
60sec.ON
changes in the indoor fan speed shifts up as follows, fromIndoor
"off" to "D" to UL". And when the current falls bellow P5,Fan MotorOFF
30sec.
the indoor fan speed shift up is canceled.
Preheat Air
AY-
AY-
Flow Control
Current transition
A184E A244E
Figure Y-12
P1 18.0A 23.3A
P2 13.5A 19.0A
10.Delayed operation of the reverse valveP3 13.0A 18.5A
When the heat operation is shut down or the operatingP4 12.5A 18.4A
Input currentmode is switched from heat to cool or dry, or vice versa,P5 12.3A 17.5A
the reverse valve is switched after 3 minutes.
Time
Outdoor Indoor Compressor11.Test run
Fan motorFan motorOFF
OFFShift UPIf the OTEST RUN� button in the unit is pushed during
Figure Y-10suspension of operation, cool test operation starts. At this
time, the fan speed is set to OAUTO�.
8. Freeze preventiveIf this button is pushed during operation, the test operation
When the indoor pipe temperature falls below -1uC
starts in current operation mode. The operation LED (red)
during cool operation or dry operation, the compressor is
flickers during test run.
turned off.In cool and heat mode continuous compressor on
operation is performed. In dry mode the operation is in
9. Defrostdehumidifying zone. In fan only mode the indoor fan
The defrost timer (integrating the operation time ofmotor runs continuously.
compressor) counts time with microcomputer during heat
operation.12.Timer
The frost of outdoor pipe is estimated by indoor pipe
12-1 24-HOUR PROGRAMMABLE ON/OFF TIMER
temperature (TH2), room temperature (TH1), indoor fan
ON-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 turned
hour after the OFF-timer is set, thermostat setting
off, the fan speed is set to OD� and the outdoor fan motor
is automatically shifted (+1uC in cool operation and
is turned off.
dry operation, -3uC in heat operation, but, 16uC set
30 seconds later the indoor fan motor is turned off, 50
temperature at the lowest).
seconds later the reverse valve is turned off, and 60When the ON-timer is set in heat operation and
seconds later the compressor is turned on.
cool operation, operation starts before 0 to 30
In the end of defrosting, the compressor is turned off, theminutes(depends on the room temperature) so
outdoor fan motor is turned on, 50 seconds later the
that preset temperature is obtaind at set time.
reverse valve is turned on, 60 seconds later the
compressor is turned on, starting heat operation.
12-2 ONE-HOUR TIMER
At this time, the indoor fan motor is turned off or the fan
When ONE-HOUR timer is set, the unit turns off
speed is set to OD� if preheat air flow function is effective.
automatically after one hour. The one hour timer
operation has priority over other time operation,
Switch
ONDefrostDefrostsuch as the TIMER ON and TIMER OFF. If the
ONE-HOUR TIMER button is pressed again during
operation, the unit will operate additionally for
another one hour.
HeatingHeatingHeating
Min. Max.Min.Max.
40min.11min.30min.11min.
Figure Y-11
14 |
ACEC
