Airwell YEVFD Series, Service Manual

Page: 62 / 92

18. Troubleshooting
If sensor terminal is fixed well
Check if PCB is faulty,
if yes, replace it
If sensor resistor
/characteristic is proper
Reconnect
Replace sensor
No
No
Yes
Yes
[20~24] Temperature sensor failure
If sensor terminal is fixed well
If voltage between red terminal
and black terminal is 5V when
testing pressure sensor by
multimeter
If voltage between white terminal and black
terminal is 0.5V~3.5V when testing pressure
sensor by multimeter
Replace connecting board
Reconnect
Replace PCB
Replace pressure sensor
No
No
No
Yes
Yes
Yes
[28, 29] High/low pressure sensor failure
60