Fujitsu General ARXG45KHTB

7-8. High temperature and high pressure release control
The compressor is controlled as follows.
• Cooling mode
Indoor unit heat exchanger
temperature rises
Indoor unit heat exchanger
temperature drops
Stable zone
AB
BC
CD
Zone A
Zone B
Zone C
Zone D
AB:
64°C
BC: 60°C
CD: 58°C
Zone Operation
Zone A Compressor is stopped.
Zone B The compressor frequency is decreased. -7 rps/120 sec.
Zone C
The protection is released and the operation is returned to normal mode.
Zone D
• Heating mode
Indoor unit heat exchanger
temperature rises
Indoor unit heat exchanger
temperature drops
Stable zone
AB
BC
CD
DE
Zone A
Zone B
Zone C
Zone D
Zone E
AB: 63°C
BC: 53°C
CD: 50°C
DE: 48°C
Zone Operation
Zone A Compressor is stopped.
Zone B
The compressor frequency is decreased.
-7 rps/120 sec.
Zone C -1 rps/120 sec.
Zone D
The protection is released and the operation is returned to normal mode.
Zone E
7-8. High temperature and high pressure release control - (04-31) - 7. Various protections
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS