High Temperature And High Pressure Release Control - Fujitsu AO G09KATA Series Service Instruction

7-8. High temperature and high pressure release control

The compressor is controlled as follows.
¢ Models: AOYG09KATA, AOYG12KATA, AOYG14KATA, and
AOYG18KATA
• Cooling mode
Indoor unit heat exchanger
temperature rises
AB
BC
CD
Zone D
Zone
Zone A Compressor is stopped.
Zone B
The compressor frequency is decreased.
Zone C
Zone D
The protection is released and the operation is returned to normal mode.
Zone E
• Heating mode
Indoor unit heat exchanger
temperature rises
AB
BC
CD
Zone D
Zone
Zone A Compressor is stopped.
Zone B
The compressor frequency is decreased.
Zone C
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
Indoor unit heat exchanger
temperature drops
Zone A
Zone B
Zone C
Stable zone
DE
Zone E
Indoor unit heat exchanger
temperature drops
Zone A
Zone B
Zone C
Stable zone
DE
Zone E
- (01-34) -
AB: 61°C
BC: 60°C
CD: 59°C
DE: 54°C
Operation
AB: 61°C
BC: 55°C
CD: 53°C
DE: 50°C
Operation
-30 rps/30 sec.
-5 rps/60 sec.
-25 rps/120 sec.
-3 rps/60 sec.
7. Various protections