Haier AU082FYCRA(HW) Service Manual page 81

[35] 4-way valve reversing failure, or Temperature sensor Two, Twi, Thi, Tho of Hydraulic module is wrong
installed
If Temperature sensor Two,
Twi, Thi, Tho of Hydraulic
module is wronginstalled
If connection between 4-way valve
and connecting board is good
If system meets condition of
4-way valve reversing: Pd-
Ps>0.6MPa
Measure if CN49 voltage on
connecting board is 220VAC after
4-way valve reversing condition
If compressor running current
If there is air noise after 4-way
valve reverses, and if the temp.
of connection pipes with 4-way
valve is normal
Replace 4-way valve
Y
Y
Y
is met
N
is normal
Y
N
Y
Reinstall the Temperature
sensor of Hydraulic module
N
Re-connect
N
Check if SV1 leaks
N
Replace connecting board
N
Check compressor
79