Haier GE GFW510SCN0 Technical Service Manual page 76

Fault
Description
Code
27
IMP Overheated Inverter over temperature
29
Drive System
Self-Check Fault
30
Main Board
Over Voltage
31
Main Board Self
Check Failed
32, 77 Critical door
Lock Failure:
Can't Unlock
Door
Trigger Condition
(> 221°F) for 5 seconds
MCU failed self-check.
One fault over the
checking process (ROM,
RAM, CPU Registers,
Stack, Clock) triggers the
fault. The self-checking
is continuously performed
by MCU.
When connected to
power, voltage is higher
than 160 VAC.
MCU failed self-check.
One fault over the
checking process (ROM,
RAM, CPU Registers,
Stack, Clock, AD) triggers
the fault. The self-
checking is continuously
performed by MCU.
Cycle canceled due to
inability to unlock door.
– 76 –
Action
• Check whether drum is easy to tumble.
• Check that motor has no signs of over
temperature.
• Reset inverter board by unplugging
washer for 30 seconds. Run a drain
and spin by selecting Rinse+Spin cycle
and select no rinse by pressing Rinse
until both Extra and Normal lights turn
off.
• Enter Service Mode and check that
fault has cleared.
• If fault persists, or unit does not spin,
replace inverter board.
• Run a spin test in service mode to
verify motor operation.
• If no movement, check rotor, stator,
harness and connectors for damage.
• If above components are good, replace
inverter board.
• Check if the voltage is higher than
160V.
• If voltage is normal, replace the main
control board.
• Check door lock, door switch, water
temperature sensor.
• Check harness and connections.
• If above is checks good, replace the
main control board.
• Verify the door is closed properly, if
door is not close freely, lift the door until
close free.
• Replace door lock and door lock
harness then run below actions.
• Check the door lock using Service
Mode spin test 14 to ensure door lock
operation.
• Verify that the door lock is not blocked
by any external debris.
• Check door switch continuity at J513 on
the control.
• Check continuity of door lock position.
Opened or Closed.
• Check for proper operation of door lock.
120 VAC while activating.
• Check door lock wiring harness from
the control to lock assembly.
(Continued next page)