(1) IPM/overcurrent error.
(4250 detailed No. 101, 102, 103,
104, 105, 106, 107)
(3) ACCT sensor circuit error.
(5301 detailed No. 115)
(4) DCCT sensor circuit error.
(5301 detailed No. 116)
(5) IPM open error
(5301 detail No.119)
(1) Compressor Meg failure
Error if less than 1M
Ω
.
• When no refrigerant is accumu-
lated in the compressor.
(2) Compressor coil resistance failure
Coil resistance value of 0.16
Ω
(20˚C)
(1) IPM/overcurrent error.
(4250 detailed No. 101, 102, 103,
104, 105, 106, 107)
(2) There is a high possibility of an in-
verter circuit error if the voltage un-
balance across all wiring is greater
than the larger of the values repre-
sented by 5% or 5V.
(3) No voltage unbalance across all wir-
ing
(1) There is a high possibility of an in-
verter circuit error if the voltage un-
balance across all wiring is greater
than the larger of the values repre-
sented by 5% or 5V.
(2) No voltage unbalance across all wir-
ing
Check item
Phenomena
Treatment
[1]
Check the INV
board error
detection circuit.
[2]
Check for com-
pressor ground
fault or coil error.
[3]
Check to see if
the inverter is
damaged.
• Perform this
check if an er-
ror occurs im-
mediately be-
fore or after
turning on the
compressor.
[4]
Check to see if
the inverter is
damaged.
• Perform this
check if an er-
ror occurs dur-
ing steady op-
eration.
Perform the following:
1. Disconnect INV board CNDR2.
After removing, turn on the out-
door unit and check the error
status. (The compressor does
not operate because CNDR2,
which carries the IPM drive sig-
nal, has been disconnected.)
Disconnect the compressor wir-
ing, and check the compressor
Meg, and coil resistance.
Perform the following:
1. Reconnect the connector re-
moved at item [1].
2. Disconnect the compressor wir-
ing.
3. Turn on SW1-1 on the INV
board. Operate the outdoor unit
after above steps. Check the in-
verter output voltage.
•
• Measure when the inverter out-
put frequency is stable.
Turn on the outdoor unit.
Check the inverter output voltage.
•
• Measure when the inverter out-
put frequency is stable.
• Replace the INV board.
• Replace the INV board.
See to
9
.[4].6.(4)
(2) Logic error
(4250 detail No.111)
"Current Sensor ACCT"
Check the resistance and replace if er-
roneous. Replace the INV board if the
ACCT status is normal.
• Replace the DCCT
After replacing the DCCT, operate the
outdoor unit again. In the case when
the error occurs again, replace the INV
board. (The DCCT may be no prob-
lem.)
• Normal
• Replace compressor
Check whether the refrigerant is ac-
cumulating in the compressor again.
• Refer to item [5] for inverter circuit
trouble.
See item [2].
Proceed to item [5] however if there is
no problem at [2]. Replace the com-
pressor if there is no problem at [5].
• Refer to item [5] for inverter circuit
trouble.
See item [2].
Proceed to item [5] however if there is
no problem at [2]. Replace the com-
pressor if there is no problem at [5].
(2) Treatment of inverter output related troubles
It is recommend to use the teste
rused to determine the
9
.[4].6.(5) IPM troubleshooting
when checking the inverter
output voltage.
It is recommend to use the teste
rused to determine the
9
.[4].6.(5) IPM troubleshooting
when checking the inverter
output voltage.
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