Haier AU96NFTAHA Service Manual page 87

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[bb] Protection action of exhaust temperature (TD2)
Whether the gas
pipe, liquid pipe and shutoff valve
of outdoor unit are
all open
Yes
Whether
outdoor PMV is normal
1.Connection of the connectors 1.Wiring;
2.Winding; 3.Valve body
4.Outdoor PCB
Yes
Whether the resistance
value/temperature characteristic of
TD2 sensor is normal
Yes
Whether the wiring is correct
No
Insufficient refrigerant, block,
refrigerant pipe is bent
[bd] Contact adhesion of AC contactor (for commercial compressor)
Whether the
Mg-SW contact is adhesive
No
Whether the refrigerant enters
Yes
Whether the
Ps sensor is normal
1.Connection of the connectors; 2.Broken
wire; 3.Characteristic of sensor
4.Outdoor PCB
Yes
Whether the
TD2 sensor is normal
Yes
Check outdoor PCB, if improper,
replace it
No
No
No
No
(Check the function and conductconfirmation through outdoor unitmismatching line)
(Confirm whether there are block, broken refrigerantpipe. Judge whether the refrigeran
Yes
No
No
No
84
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Fully open shutoff valve
Repair outdoor PMV
Replace TD2 sensor
Wiring as per regulation
Replace Mg-SW
Seal the refrigerant
Repair improper portion
Replace TD2 sensor

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