49
[13][14] High/ low pressure switch open circuit
If connection between pressure
switch and connecting
board is good
If the system pressure meets the
condition that pressure switch
shuts off
Make pressure switch
close, measure if terminal is
conductive by multimeter
If the system is clogged
Make pressure switch terminal
on connecting board in short circuit,
check if failure exists still
Replace pressure switch
and measure again
Replace connecting board
Check the piping system
Re-connect
Replace pressure switch
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
