T3 Temp Sensor Error; Check If The Low Pressure Protection Is Normal - Westinghouse WPAXH-060CA4 Service Manual

WESTINGHOUSE PACKAGE A/C MANUAL
2) Compressor didn't run (All wires connection are correct and reliable, if power supplier is
required range. If compressor didn't run, you can analysis as flowing)
Detect if the voltage of compressor which
corresponds to the interface on PCB is 208 ~
230V AC between CN6 of COMP1, COMP2
and N.
Yes
If indoor fan motor contactor is
close.
Yes
Replace
compressor.

3) T3 temp sensor error.

Is the electric resistance of T3 answer for
Appendix 1?
Yes
Replace PCB.
4)

Check if the low pressure protection is normal.

Replace PCB.
No
Replace
contactor.
Replace the T3 sensor.
Check if the low pressure protection is normal
(The normal resistance is 0Ω).
Yes
1：Check if the refrigerant in system is less.
2：Detect if system have blocked
3：Check if the four-valve is broken.
4：Detect if low-pressure switching ontology is bad,
replace the low-voltage switch.
R-410A : 220V: 60Hz
No
Detect if the fuse on PCB is burned
off.
Yes
No
Replace fuse.
Check if the secondary voltage
transformer is normal.
Yes
Replace
PCB.
No
No
No
Replace
transformer.
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