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Troubleshooting by Indication on the Remote Controller
SiUS39-602
168
Troubleshooting
2.37
“
L9
”
Outdoor Unit:
Inverter Start up Error
Remote
Controller
Display
L9
Applicable
Models
REYQ72M, 96M
Method of
Malfunction
Detection
Malfunction is detected from current flowing in the power transistor.
Malfunction
Decision
Conditions
When overload in the compressor is detected during startup
Supposed
Causes
Defect of compressor
Pressure differential start
Defect of inverter PC board
Troubleshooting
Refer check 13 to P.213.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Inverter
output
voltage check
Inverter output voltage
is not balanced.
(Normal if within
±
10V)
Must be measured
when frequency
is stable.
Unsatisfactory pressure
equalization
Check refrigerant system.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
YES
Replace the inverter PC board
NO
NO
Reset and restart.
NO
The difference
between high and low
pressure when starting
is above
29psi.
YES
YES
Check No. 13
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode ON by
service mode.
After turning
on again, "L9" blinks
again.
(V2814)
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...