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[30-0,30-1,30-2]high pressure switch shut off failure
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
replace pressure switch
and measure again
[34] protection of discharging temp. too high
if sensor terminal is fixed wel l
yes
if sensor resistor
/characteristic is proper
yes
if the system is
lack of refrigerant
no
replace connecting
board
yes
yes
yes
no
exists still
no
no
no
yes
no
re-connect
no
replace pressure switch
no
yes
check the piping system
yes
replace connecting board
reconnect
replace sensor
charge refrigerant
155
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