128
[35] 4-way valve reversing failure
Reinstall the Temperature
sensor of Hydraulic module
If Temperature sensor Two,
Twi, Thi, Tho of Hydrolic 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
is met
If compressor running current
is normal
Replace 4-way valve
If there is air noise after 4-way
valve reverses, and if the temp.
of connection pipes with 4-way
valve is normal
Re-connect
Check if SV1 leaks
Replace connecting board
Check compressor
Y
Y
Y
Y
N
N
Y
N
N
N
N