Carrier 538FEQ009RBGA, Service Manual

Page: 43 / 94

43
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
Yes
Yes
Yes
Yes
Number jumping
The circuit of
outdoor unit
communication
is normal
Yes
No
No
No
N
End
No
Fig. 46 – Troubleshooting