Hitachi RAF-25NH4 Données Techniques page 143

FORCED COOLING
¥ The following shows the operation state of forced cooling.
Power
Service switch
Unit 1
Unit 2
Heating output
Cooling output
Turns on
for cooling
Turns on
for heating
Outdoor fan
Operation
In-rush Prevention
Power
Approx. 100ms
Compressor
rotation speed
520
480
Unit 1
0
Hold 500ms
520
480
Unit 2
0
Service switch
Unit 1
Unit 2
Heating output
Cooling output
Turns on
for cooling
Turns on
for heating
Outdoor fan request
Operation
In-rush Prevention
Power
Approx. 100ms
Compressor
rotation speed
520
480
Unit 1
0
Hold 500ms
520
480
Unit 2
0
¥ TSKTM1 and PSTART are EEPROM data.
※
¥ See other sections for details of expansion valve TD control, ÆN correction and distribution control.
1s
1s
1s
100ms
TSKTM1
Outdoor temperature
62.5pps
[
PSTART
Initialization
Outdoor temperature
finished
[
Hold 500ms
1s
1s
1s
100ms
TSKTM1
Outdoor temperature
62.5pps
[
PSTART
Initialization
Outdoor temperature
finished
[
Hold 500ms
Forced cooling request
Forced cooling request
Lo
4000min
40
＜ ℃]
TD control + N correction + distribution control
△
40
＜ ℃]
TD control +
△
PSTART
Forced cooling request from main
Forced cooling request
Forced cooling request
Lo
4000min
40
＜ ℃]
TD control + N correction + distribution control
△
40
＜ ℃]
TD control +
△
PSTART
162
-1
N correction + distribution control
-1
N correction + distribution control
Balancing request
Balancing request
30s
15s +
sub
Balancing for 3 minutes
80s
Balancing request
Balancing request
30s
15s
Balancing for 3 minutes
80s