Hitachi RPC-1.5FSR Technical Catalogue page 78

CONTROL SYSTEM
n Freezing Protection Control during Cooling or Dry Operation
Cooling Operation
1-68
Power Supply
Is compressor
No
operated for more than
30 min. *1) ?
*1): The check interval differs
Yes
Gas or Liquid Pipe
Surface Temp. of
Indoor Heat Exchanger
< 0 o C
Is it continuous for
more than 3 min.?
Yes
MIF Operation at Set Fan Speed
(In case of Dry Operation,
MIF Operation: OFF for 6 min.)
for Individual
Operation
I.U. Electronic Expansion Valve:
Completely Closed
Is it continuous
for more than 3 min.?
(6 min. in case of
Dry Operation)
Yes
a
Gas or Liquid Pipe
Surface Temp. of
Indoor Heat Exchanger
> 14 o C
Yes
Elapsed Time:
15 min.
No
Either of Pipe Surface
Temp. *2) > 2 C
o
*2): Pipe Surface Temp.
Yes
I.U.: Indoor Unit
depending on the conditions.
Cooling Operation
> 0 o C
No
for Simultaneous or Single
Operation
Inverter Frequency = 0Hz
No
< 14 o C
No
NOT adopted at .
a
TCI-20007-rev.1