Other information:
Oil Specification
1.
The HFC-134a system requires synthetic (PAG) compressor oil
whereas the R-12 system requires mineral compressor oil. The two oils
must never be mixed.
2.
Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the compressor model.
Self Diagnosis
1.
Self-diagnosis process
2.
How to read self-diagnostic code
After the display panel blinks three times every 0.5 second,
the corresponding fault code blinks on the setup temperature display
panel every 0.5 second and will show two figures.