Hitachi RPC-2.0FSR - Page 78

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