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SiUS39-602
Troubleshooting by Indication on the Remote Controller
Troubleshooting
145
2.16
“
E5
”
Compressor Motor Lock (INV Compressor)
Remote Controller
Display
E5
Applicable Models
REYQ72M, 96M
Method of
Malfunction
Detection
Inverter PC board takes the position signal from UVWN line connected between the inverter and
compressor, and detects the position signal pattern.
Malfunction
Decision
Conditions
The position signal with 3 times cycle as imposed frequency is detected when compressor
motor operates normally, but 2 times cycle when compressor motor locks. When the position
signal in 2 times cycle is detected.
Supposed
Causes
Compressor lock
High differential pressure (72psi or more)
Incorrect UVWN wiring
Faulty inverter PC board
Stop valve is left in closed.
Troubleshooting
Check the installation
conditions.
Is the stop valve open?
NO
Is the UVWN wiring
normal?
NO
NO
NO
NO
Is high
differential pressure
starting? (72psi
or more)
YES
YES
YES
Check and see
whether compressor is
short-circuited or
ground.
YES
YES
Are inverter
output voltages the same
for 3 phases?
Does low or
high pressure vary
even instantaneously when
restarting
compressor?
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Open the stop valve.
Connect correctly.
Remedy the cause.
Replace the compressor.
Replace the inverter PC
board (A2P).
Replace the compressor.
(V2793)
NO
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...