Haier AV10IMWEWA Design, Installation & Maintenance Instruction page 275

[75-0, 75-4]
pressure drop too low between high pressure and low one
check if high/low pressure
sensor is connected well
check if compressor
wire is connected
normally
if wires of inverter
compressor are connected
oppositely
if 4-way valve is
interconnected
measure if there is
voltage among U, V, W
of compressor by
multimeter , and if it is
replace inverter compressor
yes
yes
no
no
normal
no
re-connect
no
correct compressor wire
yes
correct compressor wire
yes
replace 4-way valve
no
replace inverter module
274