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Troubleshooting (OP: Unified ON/OFF Controller)
SiUS34-801A_b
472
Troubleshooting
[Check 15] Concept of inverter-related malfunction codes
460V: 32.3A
(230V: 59.1A)
460V: 19.0A
(230V: 33.5A)
460V: 16.1A
(230V: 27.6A)
260 consecutive sec.
5 consecutive sec.
P4
L1
L4
U2
P1
PJ
E5
L9
L5
L8
LC
Inverter compressor lock
(Compressor does not run at all.)
PC board mismatching
When incorrect inverter
PC board is connected
Imbalanced power supply voltage
When imbalance in
voltages among three
phases comes to 2%
or more
Power supply voltage error
When the power supply
voltage falls out of the
range of 460VAC±10%
230VAC±10%
Radiator fin temperature rise
When the radiator fin
temperature reached
199.4˚F or more
Faulty fin thermistor
When the fin thermistor resistor detects
an open circuit (-22˚F or less) or a short
circuit (248˚F or more)
Transmission error
Overcurrent of inverter compressor
When transmissions between the
main PC board and the inverter
PC board are not normal
Main (Control) PC board
Weak-current
part
Heavy-current
part (Power
transmission etc.)
Inverter
PC board
Compressor
Power supply
(3 phase, 460VAC)
(3 phase, 230VAC)
Current
Time
L5
L8
L8
Instantaneous
overcurrent
Compressor overcurrent
(Electronic thermal 2)
Compressor overcurrent
(Electronic thermal 1)
Max. control
When the heavy current part of
inverter gets faulty (gives no output)
Instantaneous overcurrent of inverter compressor
(When inverter output current exceeds 460V units:
32.3A 230V units: 59.1A even instantaneously)
For 460V units
An overcurrent of 19.0A or more continues
for a period of 5 consecutive seconds
An overcurrent of 16.1A or more continues
for a period of 260 consecutive seconds.
For 230V units
A current of 33.5A or more continues for a
period of consecutive 5 sec.
A current of 27.6A or more continues for a
period of consecutive 260 sec.
Faulty startup of inverter compressor
(Compressor stops running
immediately after it starts up.)
Malfunction codes related
to compressor current
Faulty inverter
Summary of Contents for VRV III
Page 15: ...SiUS34 801A_b xiv ...
Page 23: ...Model Selection SiUS34 801A_b 8 General Information ...
Page 133: ...Field Settings SiUS34 801A_b 118 VRVIII R 410A Heat Pump 60Hz ...
Page 254: ...SiUS34 801A_b Test Operation VRVIII R 410A Heat Recovery 60Hz 239 R 410A Label R 410A Label ...
Page 329: ...Field Setting SiUS34 801A_b 314 Indoor Unit ...
Page 340: ...SiUS34 801A_b Troubleshooting by Remote Controller Troubleshooting 325 ...
Page 490: ...SiUS34 801A_b Piping Diagrams Appendix 475 Heat Pump 230V RXYQ72 96 120PTJU 3D058636A ...
Page 491: ...Piping Diagrams SiUS34 801A_b 476 Appendix Heat Pump 230V RXYQ144PTJU 3D058640 ...
Page 492: ...SiUS34 801A_b Piping Diagrams Appendix 477 Heat Recovery 460V REYQ72 96 120PYDN 3D058639A ...
Page 493: ...Piping Diagrams SiUS34 801A_b 478 Appendix Heat Recovery 460V REMQ72PYDN 3D058637A ...
Page 494: ...SiUS34 801A_b Piping Diagrams Appendix 479 Heat Recovery 460V REMQ96 120PYDN 3D058638A ...
Page 495: ...Piping Diagrams SiUS34 801A_b 480 Appendix Heat Recovery 230V REYQ72 96 120PTJU 3D058639A ...
Page 496: ...SiUS34 801A_b Piping Diagrams Appendix 481 Heat Recovery 230V REYQ144PTJU 3D058640 ...
Page 497: ...Piping Diagrams SiUS34 801A_b 482 Appendix Heat Recovery 230V REMQ72PTJU 3D058637A ...
Page 498: ...SiUS34 801A_b Piping Diagrams Appendix 483 Heat Recovery 230V REMQ96 120PTJU 3D058638A ...
Page 501: ...Piping Diagrams SiUS34 801A_b 486 Appendix 1 3 BS Unit 4D057985A ...
Page 537: ...Piping Installation Point SiUS34 801A_b 522 Appendix ...
Page 543: ...Pressure Sensor SiUS34 801A_b 528 Appendix ...
Page 563: ...SiUS34 801A_b iv Index ...