Fujitsu ASTG30KMTC - Current Release Control; Cooling Pressure Over-Rise Protection

8-8. High temperature and high pressure release control
(
heating mode)
In heating mode, the compressor is controlled as follows.
¢ Model: AOTG30KMTC
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: 55°C
CD: 53°C
DE: 50°C
Zone Operation
Zone A Compressor is stopped.
Zone B
The compressor frequency is decreased.
-15 rps/120 sec.
Zone C -2 rps/120 sec.
Zone D
The protection is released and the operation is returned to normal mode.
Zone E
¢ M
odel: AOTG34KMTC
Indoor unit heat exchanger
pressure rises
Indoor unit heat exchanger
pressure drops
Stable zone
AB
BC
CD
DE
Zone A
Zone B
Zone C
Zone D
Zone E
AB: 4.1 MPaG
BC: 3.5 MPaG
CD: 3.3 MPaG
DE: 3.0 MPaG
Zone Operation
Zone A Compressor is stopped.
Zone B
The compressor frequency is decreased.
-15 rps/120 sec.
Zone C -2 rps/120 sec.
Zone D
The protection is released and the operation is returned to normal mode.
Zone E
8-8. High temperature and high pressure release control (heating mode) - (04-29) - 8. Various protections
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS