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Troubleshooting for Outdoor Unit
SiUS091601EA
159
Part 6 Service Diagnosis
Reference
Reference
7.5 Input Overcurrent Detection
Error Code
E8
Method of Error
Detection
An input overcurrent is detected by checking the input current value with the compressor running.
Error Decision
Conditions
The current exceeds about 12.0 ~ 20.0 A (depending on the model) for 2.5 seconds with the
compressor running.
The upper limit of the current decreases when the outdoor temperature exceeds a certain level.
Supposed
Causes
Outdoor temperature is out of operation range.
Defective compressor
Defective power module
Defective outdoor unit PCB
Short circuit
Troubleshooting
Check No.15
Check No.17
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
*
An input overcurrent may result from wrong internal wiring. If the system is interrupted by an input
overcurrent after the wires have been disconnected and reconnected for part replacement, check the
wiring again.
(R21863)
NO
YES
YES
NO
Start operation and measure the
input current.
Check No. 18
Check the discharge pressure.
Check No. 17
Check the installation condition.
Check No.15
Check with the inverter analyzer.
Turn off the power and disconnect
the harnesses U, V, and W.
Turn off the power, and reconnect
the harnesses. Turn on the power
again and start operation.
Replace the outdoor unit
PCB (main PCB).
Correct the power supply or
replace the outdoor unit
PCB (main PCB).
Any LED off?
Input current
flowing above its stop level?
*
Inverter analyzer:
RSUK0917C
Summary of Contents for FDMQ12RVJU
Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications ...
Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter ...
Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U ...
Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368 ...
Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A ...