yes
if connection between
pressure switch and connecting
board is good
[30]high pressure switch shutoff failure
no
no
no
yes
yes
no
if the system pressure meets
the condition that pressure
switch shuts off
re-connect
replace pressure switch
check the piping system
replace connecting board
replace pressure switch
and measure again
yes
no
yes
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
[34] protection of discharging temp. too high
if sensor terminal is fixed well
no
yes
reconnect
no
yes
replace sensor
if sensor resistor
/characteristic is proper
replace connecting
board
no
charge refrigerant
if the system is
lack of refrigerant
yes
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