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