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Troubleshooting
Si01-406
98
Service Diagnosis
4.10
Input Over Current Detection
(E8)
Remote
Controller
Display
E8
Method of
Malfunction
Detection
An input over-current is detected by checking the input current value being detected by CT with
the compressor running.
Malfunction
Decision
Conditions
The following CT input with the compressor running continues for 2.5 seconds.
Cooling: Above 11A, Heating: Above 13A
Supposed
Causes
Over-current due to compressor failure
Over-current due to defective power transistor
Over-current due to defective outdoor unit PCB
Error detection due to outdoor unit PCB
Over-current due to short-circuit
Troubleshooting
Check No.7
Refer to P.117
Check No.8
Refer to P.118
Note:
If the model doesn’t have SPM, replace the outdoor unit PCB.
Replace the outdoor unit
PCB.
∗
Inverter checker
Part No.: 1225477
Correct the power supply or
replace the SPM.
(Replace the outdoor unit
PCB.)
(R2952)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Input current flowing
above its stop level?
NO
YES
Any LED off?
YES
NO
Check with the inverter checker (
∗
).
Turn off the power, and reconnect
the harnesses. Turn on the power
again and get restarted.
Turn off the power and disconnect
the harnesses U, V and W.
Get restarted and measure the
input current.
Check No. 8
Check the discharge pressure.
Check No. 7
Check the installation condition.
∗
An input over-current may result from wrong internal wiring. If the wires have been disconnected and
reconnected for part replacement, for example, and the system is interrupted by an input over-current,
take the following procedure.
Summary of Contents for FT25CV1A
Page 7: ...Si01 406 vi Table of Contents...
Page 15: ...Functions Si01 406 4 List of Function...
Page 21: ...Specifications Si01 406 10 Specifications...
Page 205: ...Wiring Diagrams Si01 406 194 Appendix...
Page 209: ...Si01 406 iv Index...