Gree GVH24AK-K3DNC6A - Page 52

49
Installation and Maintenance
Service Manual
Detection ow for communication circuit of ODU is as below (refer to the key test points of ODU)
Y
Y
Y
Y
Y
N
N
N
N
Start
Measure voltage of
Test 10 in the fig.
with voltage meter
Numerical value
changes
Measure voltage of
Test 13 in the fig.
with voltage meter
Numerical value
changes
Measure voltage
of Test 11 in the
fig. with voltage
meter
Numerical value
changes
Numerical value
changes
Communication
circuit of ODU is
normal
Measure voltage of
Test 12 in the fig.
with voltage meter
ODU is faulted End