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Compressor overload protection
Viewing malfunction code
through remote controller within
200s
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Wrong connection of communication wire or malfunction of
electronic expansion valve
Hardware malfunction
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Detection status of wrong connection of communication wire
or malfunction of electronic expansion valve
Operation status
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Start failure of compressor
Viewing malfunction code
through remote controller within
200s
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Overload protection
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Compressor desynchronizing
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IPM modular protection
H5
DC bus-bar low volt
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PFC protection
HC
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Note:
D
ischarge the position
as
in below pictures with discharge resistance after open
ing
the top
cover and
check if the voltage is below 20V with universal meter, then begin to check.
18K:
24K:
1 IPM protection malfunction:
Main checking point:
●
If the input voltage of the unit is within normal range?
●
If the connection wire of compressor is connected well? Is it loose? If the connection sequence is correct?
●
If the resistance of compressor coil is normal? If the isolation of compressor coil with copper pipe is good?
●
If the unit is overloaded? If the heat radiation of the unit is good?
●
If the refrigerant charge is suitable?
Содержание DHW18CMB21S
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