Airwell KXV Series, Engineering Manual

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Engineering manual
55
6 System Faults and protections
6.1 Faults
6.1.1 ODU faults
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OAT sensor fault
In Cooling mode, if OAT has fault, it will be replaced as a value.
In Heat mode, if OAT has fault, it will be replaced as a value.

OCIT sensor fault
In Cooling mode, if OCIT has fault, it will not be replaced as a value.
In Heat mode, if OCIT has fault, it will not be replaced as a value.

OCMT sensor fault
In Cooling mode, if OCMT has fault, it will be replaced as a value.
In Heat mode, if OCMT has fault, it will be replaced as a value.

OCOT sensor fault
In Cooling mode, if OCOT has fault, it will not be replaced as a value.
In Heat mode, if OCOT has fault, it will not be replaced as a value.

CDT sensor fault
If CDT has fault, ODU will stop compressor.

CST sensor fault
In Cooling mode, if CST has fault, it will not be replaced as a value.
In Heat mode, if CST has fault, ODU main EEV will be set to open loop steps.

High/low pressure sensor fault
If high/low pressure sensor has fault, ODU will be stopped.
6.1.2 IDU faults
When receive IDU fault code, ODU will keep on normal operation.