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SiUS28-902_a
Protection Control
Function
32
4.4
Inverter Protection Control
Inverter current protection control and inverter fin temperature control are performed to prevent
tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase.
[Inverter overcurrent protection control]
[Inverter fin temperature control]
Not limited
Inverter current >XA
Inverter current
Inverter current
≥
24.9A
>XA
•
Inverter current
≤
XA
•
INV. upper limit frequency
&
•
10 sec.
•
15 sec.
•
Matching of frequency
&
• When occurring 3 times within 60 min.,
the malfunction code "
L8
" is output.
• When occurring 4 times within 60 min.,
the malfunction code "
L9
" is output.
OR
Limited
INV. upper limit frequency:
1-step down from current
compressor frequency
INV. upper limit frequency:
1-step up from current
compressor frequency
Inverter current
standby
Inverter current
≤
XA
continues for 3 min.
Status quo
Without conditions
X
13.7
Tb
≥
77˚F
12.7
Tb<77˚F
Not limited
Tfin
≥
179.6˚F
Tfin
≥
179.6˚F
Tfin
≥
180˚F
Fin temp. standby
•Tfin<174.2˚F
•INV. upper limit frequency
&
• When occurring 3 times within 60 min.,
the malfunction code "
L4
" is output.
Limited
INV. upper limit frequency:
1-step down from current
compressor frequency
•10 sec.
•Matching of frequency
&
Tfin
≤
174.2˚F
continues for 3 min.
INV. upper limit frequency:
1-step up from current
compressor frequency
Status quo
Without conditions
•
15 sec.
OR
Summary of Contents for SkyAir FCQ18PVJU
Page 1: ...Split System Air Conditioners SkyAir Inverter R 410A Heat Pump 60Hz P Series SiUS28 902_a...
Page 44: ...Other Control SiUS28 902_a 37 Function...
Page 81: ...SiUS28 902_a Troubleshooting by Remote Controller Troubleshooting 74...
Page 185: ...SiUS28 902 Precautions for New Refrigerant R 410A Precautions for New Refrigerant R 410A 178...