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Error code reference
Heat Controller Air Conditioner Error Code 02
Indoor inlet pipe thermistor sensor open/short circuit error.
SourceHeat Controller Multi-Split Air Conditioner - Service Manual: Wall Mounted Systemsp. 71
Diagnostic procedure
The full 02 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Unplug sensor from indoor PCB and measure resistance; normal is 5KΩ at 25°C (77°F). If 0KΩ or infinity, replace sensor.
SourceHeat Controller Multi-Split Air Conditioner - Service Manual: Wall Mounted Systemsp. 71
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Heat Controller air conditioner.
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