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Hitachi RAC-25RPA - Page 95

Hitachi RAC-25RPA
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Does the transflux fan rotate gently?
(Be sure to turn off the power before checking it.)
Run the product with the remote control unit set to
"cooling, strong wind".
Has the indoor fan motor run for several seconds?
While the fan was turning, did an about 7.5V voltage
occur between pins
connector (CN10)?
(These signals should normally occur only while the
fan is rotating.)
. Timer lamp blinking: blinking 10 times
[Situation] The timer lamp blinks 10 times and the product will not run.
[Estimated failure locations] ·Loose connector or wire break in the indoor fan motor


Indoor fan motor mechanically locked
Indoor fan motor
Indoor fan motor drive circuit
[Diagnosis flow]
Initiating troubleshooting
No
No
No
No
No
No
No
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Remove the cause of the mechanical lock.
Is the indoor fan motor connector (CN10) securely
inserted? Is it free of wire breaks?
Correct the connector and wiring.
For 2 to 3 seconds after startup by remote control,
did a voltage of about 1.7-3.8 V occur between pins
and
Replace the "indoor electrical unit".
Replace the "indoor fan motor".
Replace the "indoor electrical unit".
Is there a factor that mechanically hampers the rotation?
·The transflux fan is hitting and rubbing against something.
·There are deposits of viscous dust.
Replace the "indoor fan motor".
2
4 of the fan motor connector (CN10)?
1 and 4 of the fan motor
Dose a 32-38 V voltage occur between pin 4 and pin
6 of fanmotor connector (CN10)?
9
4 of fanmotor connector (CN10)?
O r dose a 5V voltage occur between pin 3 and pin
95

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