62
9.2.9 Over voltage or too low voltage protection diagnosis and solution(P1)
Check if the power supply is
normal.
Check if all the connections
and wires are good?
Disconnect the unit with power
supply and try to restart the unit
when power supply gets normal.
No
Yes
No
Correct the connections or replace
the wires.
Yes
Power on and when the unit is in
standby, check if the voltage
between P and N is around DC
310V or 340V or 380V? For different
kinds of units, the voltage differs.
Consult with technical engineer to
get definite value. Then start up the
unit, measure the voltage between
P and N. Is it in 220V~400V?
Replace outdoor mainl PCB.
Yes
No
Replace the IPM board if it is separate
with main PCB.
Summary of Contents for KFU-09HRDN1-QRC8GW
Page 1: ...12F INVERTER SERIES Service Manual 2013 12FSI A 1310...
Page 12: ...12 5 Wiring Diagram 5 1 Indoor Unit KFU 09HRDN1 QRC8W KFU 09HRDN1 QRC8GW...
Page 14: ...14 KFU 24HRDN1 QRC8GW...
Page 15: ...15 5 2 Outdoor Unit KOB 09HFN1 QRC8W KOB 09HFN1 QRD0GW...
Page 16: ...16 KOB 12HFN1 QRC8W KOC 18HFN1 QRC4W...
Page 17: ...17 KOB1 12HFN1 QRD0GW KOZ 18HFN1 QRD0GW KOC1 18HFN1 QRC8GW...
Page 18: ...18 KOF 24HFN1 QRC8W KOF 24HFN1 QRD0GW KOF 24HFN1 QRC8GW...
Page 28: ...28 5 Disconnect the charge hose from the vacuum pump...