Daikin RXYQ-TA Series, Руководство по обслуживанию, Страница: 74 / 337

Protection Control SiUS341615E
61 Functions and Control
6. Protection Control
6.1 High Pressure Protection Control
This high pressure protection control is used to prevent the activation of protection devices due to abnormal
increase of high pressure and to protect compressors against the transient increase of high pressure.
Cooling
The following control is performed in the entire system.
Heating
The following control is performed in the entire system.
Normal operation
High pressure standby
Reduce compressor capacity step
When occurring 4 times within 40
minutes, high pressure switch is
activated without high pressure standby,
thus outputting the error code
E3 .
Pc: High pressure sensor detection
value for each outdoor unit.
Pc > 3.55 MPa
(515 psi)
Pc < 3.04 MPa
(441 psi)
Pc > 3.72 MPa
(539 psi)
Normal operation
Pc > 3.04 MPa
(441 psi)
High pressure standby
Reduce compressor capacity step
Pc > 3.72 MPa
(539 psi)
Pc < 2.89 MPa
(420 psi)
When occurring 4 times within 40 minutes,
high pressure switch is activated without
high pressure standby, thus outputting the
error code
E3 .