Gree GWH09RB-K3DNA3G Service Manual page 54

Service Manual
Measure voltage at the
shown in the diagram
shown in the diagram
Measure voltage at the
shown in the diagram
The communication
circuit of the outdoor
Installation and Maintenance
Start
Measure voltage at the
Test 10 position as
shown in the diagram
with a voltmeter
Value jumping
Y
Test 15 position as
with a voltmeter
Y
Value jumping
Y
Measure voltage at the
Test 11 position as
with a voltmeter
Value jumping
Y
Test 12 position as
with a voltmeter
Value jumping
Y
unit is normal
N
N
Fault with
outdoor unit
N
N
End
51