Haier HW50-1002W Service Manual page 25

SERVICE
MANAUL
HW50-1002W
Turn on power, and set pre-wash
mode, then start. Check the import
voltage of electromagnetic valve by
multimeter is it between
220-240V?
N
Check if export voltage from PCB to
electromagnetic valve, is it between
AC 220-240V?
N
Replace PCB
Error 7
The start indicator lighted on 0.2s andoff 0.2s for 7 times,repeate 4s later .
Error message. Motor overheat protection or is damaged.
Troubleshooting:
Cut off power and check if motor wires
are connected well
Y
Measure if the resistance of motor
binding by multimeter, is it as followed?
[1.68±8%Ω (at 20°C)]
5 -10
8 -9[2.00±8%Ω (at 20°C)]
Y
Pull out the wire connection of motor
and driving computer board. Then
check if circuit is open by multimeter
Error 8
The start indicator lighted on 0.2s andoff 0.2s for 8 times,repeate 4s later .
Error message. Water level exceeds protection value.
AC
Y
N
;
;
Y
Front Load Washing Machine
Electromagnetic valve must be broken, please
Y replace it.
The wire connected PCB and inlet valve is not
properly. Please reconnect it or replace it.
Reconnect well
N
Put the motor in normal temperature
about ten minutes, and then test
again. If the resistance is natural, it
is caused by overheated protection.
Then
overload, abnormal voltage. If not,
please replace motor
Repair wires
25
check and deal with