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Part 4 Trouble Shooting
7) Troubleshooting CH26, CH27
‘B’
‘A’
26
27
DC Compressor
Position
PSC Fault
• Compressor
position detect error
• Over current at “IGBT”
• Check the connection of comp wire “U,V,W”
• Malfunction of compressor
• Check the component of “IPM”, detection parts.
Check the Reactor spec.
(18k,30k:10A/26.8mH, 24k:13A/13mH * 2)
Check AC input voltage.
Check if the outdoor fan is locked or operating.
Check input current.
Error
code
Title Cause of error Check point & Normal condition
Check Point
• CH 26
Check the connection of "U, V, W"
Check for shorts at check point "A".
Check for with the error code "21"
• CH 27
Check the "IGBT" short point "B"