Vivax Mission Inverter Series Service Manual page 57

DM16-01.01.22en
11.2.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
 I PM continuity check
Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital
tester to measure the resistance between P and UVWN; UVW and N.
Digital tester
(+)Red (-)Black
N
U
P
V
W
Service manual
P0
When the voltage signal that IPM send to compressor drive chip
is abnormal, the display LED will show "P0" and AC will turn off.
Wiring mistake
●
IPM malfunction
●
Outdoor fan ass'y faulty
●
Compressor malfunction
●
Outdoor PCB faulty
●
Normal resistance value
∞
(Several MΩ)
Digital tester
(+)Red (-)Black
U
V
N
W
(+)Red
Mission Inverter
Normal resistance value
∞
(Several MΩ)
57