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5 FAILURE INFORMATION AND CODE
5.1 Failure code of unit
NO.
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1
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Phase sequence failure of main control board check
2
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E2
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4
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E4
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6
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Ambient temperature sensor failure
8
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10
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12
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antifreeze protection sensor failure
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antifreeze protection sensor failure
Slave unit module reduction
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14
Ed
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16
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System self-check failure alarm
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Discharge temperature sensor failure alarm
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20
EU
System high-pressure protection or discharge
21
P0
temperature protection
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92
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number of previous protections
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the error can be recovered by
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