Daikin SkyAir FHQ24PVJU - Inverter Protection Control

SiUS281811EA Protection Control
Part 4 Functions and Control 121
4.4 Inverter Protection Control
Inverter current protection control and radiation fin temperature control are performed to prevent
tripping due to an error, or transient inverter overcurrent, and radiation fin temperature increase.
Tfin: Radiation fin temperature
Inverter overcurrent protection control
Inverter radiation fin temperature control
Not limited
Limited
Inverter current > 22 A
Inverter current > 22 A
Inverter current ≥ 22 A × 10% continues for 260 seconds
• Inverter current ≤ 22 A
• Compressor upper limit: Maximum frequency
&
• 10 seconds
• Matching of frequency
&
Compressor upper limit
frequency: 1-step down from
current compressor frequency
Compressor upper limit
frequency: 1-step up from
current compressor frequency
Inverter current
standby
Inverter current ≤ 22 A
continues for 3 minutes
Current step maintained
Without conditions
When occurring 4 times within 60 minutes,
the error code
L8 is output.
Not limited
Limited
Tfin t79°C (174.2°F)
Tfin t79°C (174.2°F)
Tfin t84°C (183.2°F)
Fin temperature standby
• Tfin < 76°C (168.8°F)
• Compressor upper limit: Maximum frequency
&
Compressor upper limit
frequency: 1-step down from
current compressor frequency
• 10 seconds
• Matching of frequency
&
Tfin d76°C (168.8°F)
continues for 3
minutes
Compressor upper limit
frequency: 1-step up from
current compressor frequency
Current step maintained
Without conditions
When occurring 4 times within 60 minutes ,
the error code
L4 is output.