–19–
9. Deice Control
• Deicing operation is controlled by timer and sensing the outdoor piping temperature.
• The first deicing starts only when the outdoor pipe temperature falls below -6°C after 45(30) minutes passed
from starting of heating operation.
• Deicing ends after 10(6) minutes passed from starting of deice operation or when the outdoor pipe temperature
rises over 12°C even if before 10(6) minutes.
• The second deicing starts only when the outdoor pipe temperture falls below -6°C after 45(30) minutes passed
from ending of the first deicing.
More than 45(30) minutes
of heating operation
Within
10(6) minutes
Deicing
Deicing
ON
OFF
ON
ON
ON
ON
OFF
OFF
COMPRESSOR
4-WAY VALVE
INDOOR FAN
-6
°
C
DEICE ON
12
°
C
DEICE OFF
The outdoor
piping Temp.
ON
More than 45(30) minutes
of heating operation
HOT-
START
ON
OFF
ON
INDOOR FAN
Low Fan
Low Fan
Intake Air temp.
Setting temp. +1.0
˚
C
(Compressor ON)
Setting temp. -0.5
˚
C
(Compressor OFF)
Setting temp.
2min.58sec
2min.58sec.
10min.
10min.
7min.
Within 7min. Cooling
Cooling
OUTDOOR FAN
COMPRESSOR
Selected
Fan
Selected
Fan
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
10. Soft Dry Operation
• During Soft Dry Operation, the compressor ON temperature is the setting temperature plus 1°C, the compressor
OFF temperature is the setting temperature minus 0.5°C.
• When the room temperature rises over the compressor ON temperature, the operation mode is switched to the
cooling mode.
• When the room temperature falls between the compressor ON temperature and OFF temperature, the operation
mode is switched to the Soft Dry Operation.
In this temperature range, 10min. Dry Operation, 7min operation OFF. During 10min Dry operation, if the room
temperature falls below compressor OFF temperature, Compressor OFF.
• In micom dehumidify mode, control of fan speed is as following.
