Lennox LI018CI-230P432 - Page 65

62
Installation and Maintenance
Service Manual
10.Diagnosis process for outdoor communication circuit
Start
Test voltage
value with Test
10 position in
diagram with
voltage meter
Number jumping
Outdoor unit
malfunction
Test voltage
value with Test
13 position in
diagram with
voltage meter
Number jumping
Test voltage
value with Test
11 position in
diagram with
voltage meter
Number jumping
Test voltage
value with Test
12 position in
diagram with
voltage meter
Y
Y
Y
Y
Number jumping
The circuit of
outdoor unit
communication
is normal
Y
N
N
N
N
End