Part 4 Trouble Shooting

7) Troubleshooting CH26, CH27

 

 

 

 

 

Error

Title

Cause of error

Check point & Normal condition

code

 

 

 

 

 

 

 

26

DC Compressor

• Compressor

• Check the connection of comp wire “U,V,W”

• Malfunction of compressor

Position

 

position detect error

• Check the component of “IPM”, detection parts.

 

 

 

 

 

 

 

 

 

 

 

 

Check the Reactor spec.

27

PSC Fault

• Over current at “IGBT”

(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.

 

 

 

 

‘A’

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"

‘B’

CH 27

Check the "IGBT" short point "B"

- 61 -

Only for training and service purposes

Page 61
Image 61
Heat Controller VMC18SB-1/VMH18SB-1, VMC09SB-1/VMH09SB-1, VMC30SB-1/VMH30SB-1 service manual Troubleshooting CH26, CH27, ‘B’

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