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Troubleshooting by Indication on the Remote Controller
SiUS34-801A_b
376
Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Ensure correct connection.
NO
YES
Check if
signal wire connector
for the corresponding fan
motor is normal.
Replace fan motor.
Replace inverter PC board.
For fan motor 1: replace inverter
PC board (A2P)
For fan motor 2: replace fan
inverter PC board (A5P)
NO
YES
Check if the
resistance of the fan
motor lead wire between Vcc and
UVW and between GND and
UVW are balanced.
Check the connector
of the fan motor (
∗
1).
Cut the power supply off.
∗
1. Check procedure for fan motor connector
(1) Power OFF the fan motor.
(2) Remove the connector (X2A or X4A) on the PC board to
measure the following resistance value.
Judgment criteria: resistance value between each phase is
within ±20%
Connector
for signal wires (X2A or X4A)
Check the fan motor corresponding to the malfunction code
“
H7
” in the monitor mode.
(Refer to P334~335 for how to check)
When check 3 shows as follows:
→
Fan motor 1 (M1F)
When check 3 shows as follows:
→
Fan motor 2 (M2F)
Identify outdoor unit based on Check 4.
Explanation for “ ”
Master unit
Slave unit 1
Slave unit 2
System
X2A
GND
(V2799)
Measure the
resistance
between Vcc-
UVW and
GND-UVW.
5 Gray
Vcc
W
V
U
4 Pink
3 Orange
2 Blue
1 Yellow
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 ...