264
[28, 29] High/low pressure sensor failure
if sensor terminal is fixed
well
no
yes
reconnect
no
yes
replace PCB
if voltage between red
terminal and black terminal
is 5V when testing pressure
sensor by multimeter
replace connecting
board
replace pressure sensor
yes
if voltage between white
terminal and black terminal
is 0.5V~3.5V when testing
pressure sensor by
multimeter
no
replace EEPROM
set BM_1 at OFF , re-
electrify, search for outdoor
again, check if failure
disappears
no
[33] outdoor EEPROM failure
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