Functions; Operation Functions - Sanyo SAP-KCRV243GJH Technical & Service Manual

12. FUNCTIONS

12-1. Operation Functions

Functions of the main unit controller
*OFF
:
Used to stop the unit when the remote
(Self-diagnostics)
controller is unavailable.
Used when service inspection is
performed.
*ON :
During normal operation: Starts
operation from the remote controller.
Emergency operation: When the
remote Controller is unavailable,
moving this switch from the OFF
position to the ON position starts
automatic operation.
*TEST :
Used when operating performance are
checked.
Used when pump-down is carried out.
(Operates at the rated frequency. At
this time, the main unit lamp flashes,
and the remote controller signal
cannot be received.)
*DEMO
:
This function is for shop displays.
Ordinarily it is not used.
Used during servicing.
Automatic operation
Operating mode selection
When automatic operation is selected, the indoor and
outdoor temperature sensors function, and either HEAT,
DRY, or COOL mode operation is selected automatically.
Indoor temperature
1 5˚C 22˚C 27˚C
(Approx.)
(Approx.)
22˚C
20˚C
HEAT
mode
18˚C
(only cool type unit
without this mode)
Desired-temperature memory
The set temperature in the program can be changed
as desired within the range of ±4˚C. This temperature
can then be stored. During automatic operation, press
the temperature setting buttons to change the
temperature.
Set
temperature
(standard)
27˚C
COOL
mode
Temperature
DRY
at which
operation
mode
starts
(Range:
20-26˚C)
24˚C
SENSOR DRY
During automatic operation, the system adjusts the
room temperauture and fan speed according to the
conditions in the room, in order to maintain a
comfortable room environment.
SENSOR DRY operation
Dry operation is as shown in the figure below.
Load
COOL zone
A zone
B zone
Conditions are monitored at all times
when the room temperature is below 15˚C.
DRY A
The compressor operation frequency varies depending on
the relative humidity.
The indoor fan operates with 1/f fluctuation.
DRY B
The compressor operates at a low operating frequency.
The indoor fan operates with 1/f fluctuation.
Monitor
Monitoring operation takes place when the room
temperature is below 15˚C.
When the monitoring range is entered, the compressor
stops, and the indoor fan operates at LL.
In order to further improve inverter performance,
control is switched between PWM control at low
operation speeds, and PAM control at high operation
speeds, making the most effective use of power.
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