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Test Operation & Troubleshooting & Maintenance
4�1�5 Compressor Startup Failure(code:"LC")
4�1�6 Compressor Current Protection (Code:"P5"); Compressor Motor Desynchronizing (Code:"H7");
IPM Protection (Code:"H5"); Phase Loss (Code:"LD")
"Start failure" is
displayed on the
wired controller
LC is displayed in
the mainboard 88
indicating lamp
yes
Replace
Does it work Normally?
the compressor
Work Normally
"Start failure" is
displayed on the
wired controller
LC is displayed in
the mainboard 88
indicating lamp
no
Replace the mainboard.
Does it work Normally?
yes
yes
Replace the mainboard.
Does it work Normally?
no
Replace the mainboard.
Does it work Normally?
no
Replace the mainboard.
Does it work Normally?
10
the
driver board AP4.
no
Replace
LC is displayed in
the mainboard 88
indicating lamp
LC is displayed in
the mainboard 88
indicating lamp
yes
LC is displayed in
the mainboard 88
indicating lamp