Fujitsu AOUH12LMBH1 - 8-7. Low outdoor temperature protection; 8-8. High temperature and high pressure release control; Models: AOUH09 LMAH1 and AOUH12 LMBH1

8-7. Low outdoor temperature protection
When the outdoor temperature sensor detects lower than the trigger condition below, the compres-
sor is stopped.
Operation mode Cooling/Dry
Trigger condition 5°F (-15°C)
Release condition 14°F (-10°C)
8-8. High temperature and high pressure release control
The compressor is controlled as follows.
¢ Models: AOUH09LMAH1 and AOUH12LMBH1
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: 145.4°F (63°C)
BC: 131.0°F (55°C)
CD: 127.4°F (53°C)
DE: 122.0°F (50°C)
Zone Operation
Zone A Compressor is stopped.
Zone B
The rotation number of compressor is decreased.
-25 rps/120 sec.
Zone C -3 rps/60 sec.
Zone D
The protection is released and the operation is returned to normal mode.
Zone E
8-7. Low outdoor temperature protection - (04-27) - 8. Various protections
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS