Dc Overvoltage Protection - Gree GMV-PD100W/NAB-K Service Manual

DC Inverter Multi
VRF Service Manual

2.13 DC Overvoltage Protection

Monitoring
display
Overvoltage
protection of DC bus
Yes
How many
times does it occur
within 1 hour.
No
It is caused by interference,
Inspect wiring or interference
source . Take some actions
o prevent interference
110
E5 is displayed on
the wired controller
Is input voltage
within the running range
(185~264VAC)
Yes
Does it
occur during running of
compressor?
No
Yes
Replace mainboard
It is recorded and
.
reflected
Nixie tube of
mainboard
PH is displayed
No
No
Does it occur
during frequency drop
of compressor?
Yes
It is caused by slowdown of
the compressor. If it always
happens, inspect the
compressor.
The voltage is too high.Please
cut off the power immediately
in case damaging the unit or
causing fire accident.