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HWE10170 GB
2. Troubleshooting the inverter output-related problems
Check items Symptoms Actions to take
[1]
Check the
INV board
error detec-
tion circuit.
(unloaded)
(1) Turn off the breaker.
ΠBe sure to turn off the
breaker.
1) Overcurrent errors
Error code:4255
Replace the INV board.
(2) Disconnect the connec-
tor CNINV from the INV
board.
2) Logic error
Error code:4225
Replace the INV board.
(3) Turn on the breaker. 3) ACCT sensor circuit failure
Error code:5305
Replace the INV board.
(4) Operate the indoor
units.
4) Position detection error
Error code:4255
If the problem described at left happens
when the power is turned on for the first
time, replace the INV board.
ΠRemoving the connector CNINV while
the power is turned on can cause the
problem described at left. Be sure to
turn off the power before disconnecting
the connector CNINV.
5) Open-circuited IPM or dis-
connected ACCT sensor
Error code:5305
Normal
[2]
Check the
inverter for
damage.
(unloaded)
(1) Turn off the breaker.
ΠBe sure to turn off the
breaker.
1) An error is detected in less
than 30 seconds of startup.
(LED2 on the INV board
lights up.)
Replace the INV board.
(2) Disconnect the connec-
tor CNINV from the INV
board.
2) The line voltage imbalance
is 5V or greater.
Replace the INV board.
(3) Turn SW2-1 on the INV
board to ON.
3) There is no line voltage im-
balance.
An error is detected after 30
seconds of startup (LED2
on the INV board lights up.),
and the units will stop.
Normal
ΠReconnect the CNINV connector, and
set the SW2 back to its original setting
after checking.
(4) Turn on the breaker.
(5) Operate the indoor
units.
The units will operate for
approximately 30 sec-
onds unloaded and then
stop.
Error code:4255
During the unloaded op-
eration, a constant line
voltage of approximately
20V will be output.
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