Haier AV10IMWEWA Design, Installation & Maintenance Instruction page 280

[114] voltage too low of DC bus line of transducer
check if voltage of power
supply is normal
yes
check if wire of electric
box is correct
yes
if AC contactor
or relay acts well
measure if DC bus
line voltage between P
and N of module is less
than 375V
check rectifier , reactor, eletrolytic
capacitor in inverter main circuit
[115] voltage too high of DC bus lineof transducer
check if voltage of power
supply is normal
yes
check if wire of electric
box is correct
yes
measure if DC bus
line voltage between P
and N of module is over
644V
check rectifier , reactor, eletrolytic
capacitor in inverter main circ u it
yes
yes
yes
no
improve power supply circuit
no
correct the wiring due to diagram
no
adjust or replace relay
circuit of DC bus line voltage on
no
inverter control board
abnormal, replace inverter
control board
no
improve power supply circuit
no
correct the wiring due to diagr am
circuit of DC bus line voltage on
no
inverter control board
abnormal, replace inverter
control board
279