Haier AU96NFTAHA Service Manual page 84

[AE] protection action of exhaust temperature at low freguency
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; 2.Wiring;
3.Winding; 4.Valve body;
5.Outdoor PCB
Yes
Whether the
resistance value/temperature characteristic
of TD1 sensor is normal
Yes
Whether the wiring is correct
Yes
Insufficient refrigerant, block,refrigerant pipe is bent
[b4] Low pressure sensor (Ps) circuit
Whether the
connection and wiring of the connectors
of CN08 (low pressure sensor)
are normal
Yes
Whether the
characteristic of low pressure sensor is
normal
Yes
Whether Ps
is greater than 0.9Mpa during running
(10 minutes after start)
No
Check outdoor I/F PCB, if improper,replace it
No
No
No
No
(Check the function and conduct confirmationthrough outdoor unit mismatching line)
(Confirm whether there is block, broken refrigerant pipe. Judgewhether the refrigerant i
No
No
Yes
81
Fully open shutoff valve
Repair outdoor PMV
Replace TD1 sensor
Wiring as per regulation
Repair the connection and wiring ofthe connectors
Replace low pressure sensor
The refrigerant passes through thesuction by-pass
: http://splitoff.ru/tehn-doc.html