Blue Star U3 Error Code
PN Voltage Drop Protection.
ac
PN Voltage Drop Protection
Cause: DC bus voltage dropped below threshold
How to fix: Check incoming AC supply voltage and rectifier circuit.
Blue Star boards that may fix U3
If the board is the cause, these refurbished Blue Star boards are in stock. Match the part number before you order.
Bluestar F35BS 1 Ton Outdoor PCB
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Bluestar MIV50BS 1.5 Ton Inverter PCB
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Bluestar Godrej GRJ554-A V1 2013
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Bluestar Godrej GRJ519-A3 V1 Non Inverter PCB
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