However, if the outdoor unit fan is stopped, the start of
defrosting will be delayed by 5 minutes.
Then, the defrosting cycle will be 50 minutes from the start of
heating mode operation.
B. Completion
Defrosting mode operation will stop if the outdoor unit heat
exchanger outlet sensor is 25°C or higher or after 12 minutes of
operation.
C. Forced defrosting
If P8 on the outdoor unit circuit board is shorted while the
compressor is on during heating mode operation and the
temperature detected by the outdoor unit heat exchanger outlet
sensor is 25°C or lower, defrosting is carried out regardless of
the current starting conditions.
2. Operation
A. During defrosting, the outdoor unit turns on the compressor
and turns off the outdoor unit fan and the reversing valve.
B. The indoor unit fan operates at LOW speed for 30 seconds
upon defrosting starts, After this, the indoor unit fan turns off
until defrosting is completed.
(During defrosting, the louvre of the indoor unit stays at
horizontal position).
27.9. Indoor thermostat charateristics
1. Thermostat characteristics during cooling and heating modes.
Operation mode
Setting
temperature (To)
Room temperature (°C)
Operation Differential
2.0K 4.0K
Cooling
16 O N 18.0 ____
O F F 16.0 ____
31
O N 33.0 ____
O F F 31.0 ____
Heating *1 16 O N 18.0 20.0
O F F 20.0 22.0
29~31 O N 31.0 31.0
*1 (27~31) O F F 33.0 33.0
143
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