Gree DC Inverter Multi VRF

DC INVERTER MULTI VRF MAINTENANCE
2.10 IPM protection
E5 displayed on
hand controller
Monitor display
IPM protection
Cut off the power for 1
minute or reduce the
busbar voltage to 36V
or lower. Then, Chec
k
Mainboard.
If it is moistened,
dirty or short
circuited?
If it is moistened, dirty
or short circuited?
Work normally?
1. If it is moistened, find out the cause and
take proper measures to prevent moisture.
Dry the PFV board and appl
y
moisture-proof glue.
2. If it is dirty, find out the cause and take
dustproof measures. If the air quality o
f
service environment is poor, it is also
required to clear off the dirt periodically.
3. If it is short circuit, find out the cause and
clean the electric box to prevent the iron
scraps or other conductive substances
from attaching on the board.
Record and feed
back
Replace the
Mainboard.
No
Yes
No
No
Yes
Yes
Yes
Yes
No
No
Mainboard nixietube
Display Hc
Check if +15V in
the mainboard is
stable, as well as
1,2 role of 15VA
Check if the IPM in
the mainboard is
damaged
Please check the
compressor
connections o
r
winding for short
circuiting or othe
r
troubles.
T
ighten the compresso
r
wire again and adjust
phase sequence.