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SiUS34-801A_b
Troubleshooting by Indication on the Remote Controller
Troubleshooting
413
Troubleshooting
Check if the
temperature difference between
the suction pipe and the heat exchanger
is 68 ˚F and over.
Check if the
property of suction pipe thermister
(A7T) and heat exchanger thermister
(R4T) are normal.
(*3)
Check if the
low pressure is 14.5psi
or below. (
∗
1)
Check if the
property of low pressure
sensor is normal.
(
∗
2)
Replace the low pressure
sensor.
Replace the main PC board
(A1P).
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
NO
YES
YES
Remove the factor of
decreasing low pressure by
referring to
Check 6
.
Remove the factor of
superheating by referring to
Check 3
.
Replace the thermister.
Replace the main PC board.
• With individual systems,
replace the control PC board
1 (A1P) or the control PC
board 3 (A3P).
• With multi systems, replace
the main PC board (A1P).
NO
NO
YES
Reset the operation using the remote controller then restart.
Set up a pressure gauge at the service port on the low
pressure side.
Reset the operation using the remote controller then restart.
∗
3: Compare the thermister resistance value with the value on the surface
thermometer.
∗
1: Check the low pressure value by using pressure gauge in operation.
∗
2: Compare the actual measurement value by pressure sensor with the
value by the pressure gauge.
(To gain actual measurement value by pressure sensor, measure the
voltage at the connector [between (2)-(3)] and then convert the value
into pressure referring to P533.)
In heating mode
In cooling mode
Check 6
: Referring to the information on P465.
Check 3
: Referring to the information on P462.
∗
1
∗
2
∗
1
∗
2
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 ...