14
Time chart of defrosting in HEAT mode (reverse type)
Set position
Set speed
Set position
Set speed
Indoor fan
Compressor normal
Outdoor fan
R.V. coil
(21S4)
OFF (COOL)
OFF
Maximum frequency
Horizontal
Horizontal vane
Very Low (Temperature of indoor coil thermistor > 18 °C)
30
seconds
30
seconds
30
seconds
40
seconds
5 seconds
5 seconds
40
seconds
OFF
OFF
OFF
ON (HEAT)
ON
ON
ON (HEAT)
Compressor normal
<FD50>
Reverse defrost frequency
30
seconds
30
seconds
30
seconds
5 seconds
5 seconds
30
seconds
OFF
OFF
Horizontal (Temperature of indoor coil thermistor 39 °C)
<Indoor unit>
<Outdoor unit>
30
seconds
14
5. Defrost heater (GC·VAH, FD·VAH/VABH, GE·VAH)
(1) Starting conditions
When all of the following conditions a) ~ d) are satisfied, defrost heater turns ON to prevent ice from foaming on the
base of outdoor unit.
a) HEAT mode is selected.
b) The ambient temperature thermistor reads 5°C or less for 5 minutes continuously. (
NOTE1
).
c) The defrost thermistor reads -1°C or less for 5 minutes continuously.
d) Outdoor fan motor is turned ON.
(2) Releasing conditions
When any of the following conditions are satisfied, defrost heater turns OFF.
a) Any other mode than HEAT mode is selected. (
NOTE2
).
b) The ambient temperature thermistor reads 8°C or more for 5 minutes continuously. (
NOTE1
).
c) The defrost thermistor reads more than 15°C for 5 minutes continuously.
d) Outdoor fan motor is turned OFF.
NOTE1:
Ambient temperature thermistor
NOTE2:
During defrosting operation, defrost heater continues to be ON.
Defrost heater
ON
OFF
5°C 8°C