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5.Troubleshooting Guide
5-5 The Step Motor Does Not Work
1.Items
1)
Check if the step motor controlling the up-down movement firmly connected to Cn2?
Check if the input voltage is correct?
2)
2.Trouble shooting procedure
Pull out the power plug and replug it after some 5 seconds
Is the LED on the display board lighten?
Does the louver move up and down
after pressing the SWING button on
the remote control?
Is there any voltage change between
the chips #23,#22,#20,#19
Is there any voltage change between
10~13 of the the chip ULN2003AFW
The step motor fails
Start the air-conditioner with remote control
Confirm the procedure of
the 5-2 part
Normal
The chip IC1fails
Drive chip IC4
(ULN2003AFW)
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