Gree GWC36LB-D1NNA2A/I, Руководство по обслуживанию, Страница: 47 / 74

44
Troubleshooting
Malfunction diagnosis flowchart:
Troubleshooting for low pressure protection of compressor (E3)
Start
Check whether the
main board and display board is
connected tightly?
Check whether the
LPP terminal on main board is connected well
with the low pressure switch on the
complete unit
Check whether the wire
of low presure switch is loosened? whether
the low pressure switch is damaged
or poor connected?
Refrigerant is insufficient
Check whether the LPP input is
high level?
Connect them
correctly
Please confirm that
they are connected
well
Make sure that the
wires are connected
well and the switch
is normal
Recharge the
refrigerant according
to requirement
De-energize the
unit and then restart
the unit
Replace the control
board
Eliminate the
malfunction
Eliminate the
malfunction
Eliminate the
malfunction
Eliminate the
malfunction
Eliminate the
malfunction
End
no
no
no
no
no
no
no
no
no
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes