Hitachi RAS-8FSXN - Antifreeze Protection Control During the Cooling or Dry Operation

5.2.5 Antifreeze protection control during the cooling or dry operation
Power Supply
Is compressor operated
for more than *30 min.?
No
No
Yes
Yes
< 0°C
> 0°C
Cooling Operation or
Dry Operation
Cooling Operation or
Dry Operation
Pipe Surface Temp. of
Indoor Heat Exchanger
or Gas Pipe Surface
Temp.
Pipe Surface Temp. of
Indoor Heat Exchanger
or Gas Pipe Surface
Temp.
Is it continuous for
more than 3 min.?
MIF Operation at Set Fan Speed (In Case
of DRY Operation MIF OFF for 6 min.)
No
Yes
Is it continuous
for more than 3 min.?
(6 min. in case of DRY
Operation)
> 2°C
> 14°C
< 2°C
< 14°C
No
Yes
After 15 min.
Liquid Pipe Temp. of
Indoor Heat Exchanger
Fully Closed Electronic
Expansion Valve in Indoor Unit
* The judging time varies under the condition.
5 Control system
101
SMGB0065 rev. 1 - 12/2010
5