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Protection Control
SiUS39-602
62
Function
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
Under inverter current
protection control
Inverter current >Ia
Inverter current standby
Inverter
current
> 34A
MgS Reset
OC function
→
MgS off
Inverter current <Ia
INV upper limit frequency = 210 Hz
INV upper limit frequency: 1-step down
from current compressor frequency
INV upper limit frequency: 1-step up from
current compressor frequency
Inverter current >Ia
Inverter current<Ia continues
for 3 min. or more.
Inverter current > Ib continues for 260 sec.
Inverter current > Ic continues for 5 sec.
&
or
Ia
Ib
Ic
25 A
26.1 A
31 A
• When occurring 3 times within 60 min.,
the malfunction code “L8 ” is output.
• When occurring 3 times within 30 min.,
the malfunction code “L9” is output
Not limited
Tfin>183˚F
Fin temp. standby
Tfin<178˚F
INV upper limit frequency = 210 Hz
Under fin temperature
protection control
INV upper limit frequency: 1-step /
1 min down from current compressor
frequency
INV upper limit frequency: 1-step / 1 min
up from current compressor frequency
Interval
Inverter current<178˚F continues
for 3 min. or more.
&
Tfin>183˚F
Tfin>192˚F
• When occurring 3 times within 60 min.,
the malfunction code “L4” is output.
Summary of Contents for REYQ72
Page 35: ...Specifications SiUS39 602 24 Specifications...
Page 121: ...Field Setting SiUS39 602 110 Test Operation...
Page 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Page 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Page 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Page 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Page 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Page 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 602 iv Index...