Rotenso J100Wi, Service Manual

Page: 108 / 132

LCAC R32 Series
108 Service manual
First, test the resistance between every two ports of U, V, the W of the IPM and P, N. If any of the results is 0 or close to
0, the IPM is defective. If not, follow the following procedure:
P0displayed
IPMmoduleprotection
Yes
Is the power voltage normal?
Is the outdoor terminal voltage
normal?
Restart the unit when the power supply
returns to normal
No
Yes
No
Reconnect the power
wires
Yes
Is the voltage between L and N
normal?
Yes
Is the input voltage of bridge
r ec�fier normal?
No
No
Are the power wires
connected properly?
Reconnect L and N
Are L and N wired
correctly?
Reconnect the bridge
rectifier
Is the bridge rectifier
properly wired?
No
No
Yes
Replace the PFC module (If This has not been
done already)
No
Is the voltage between P. and
N properly wired according to
Appendix 3?
Replace the bridge rectifier
No
Is the bridge rectifier
operating normally?
Are the reactor or
Inductance wired properly?
Reconnect the wiring No
Are the reactoror
inductance normal?
Yes
Replace reactor or
inductance
No
Is the c onnec�ng wir e between
the main board and the IPM
board connect ed �gh tly?
Reconnect the main board and
IPM board
Is the outdoor unit ventilation
in working order?
Yes
Make sure that the outdoor unit is
ventilating properly
Check whetherthe refrigerant system is in
working order
No
Is the outdoor fan running
properly?
Refer to the solution for the malfunction
of the fan speed being out of control.
Find the cause and resolve the problem
No
Yes
No
Yes
Yes
Is the compress is running
normally?
Yes
Replace the compressor No
Replace IPM Board.Is the problem
resolved?
Replace the outdoor main PCB. Is
the problem resolved?
No
Is the c onnec�ng wir e of the
compressor is connected correctly
or �gh tly
Reconnect he c onnec�ng wir e
of the compressor
No
Yes
Yes
No
PART 6. TROUBLESHOOTING