>a__WcU[S^ <[c >a`V[e[a`Wc
if sensor is fixed
well
Relocate
reconnect
no
2
) Sensor failure
check if the wiring is
correct according to
wiring diagram
Is sensor short-circuit
or open-circuit?
Replace sensor
Is sensor resistance
acceptable?
Replace sensor
Is DC voltage between
both ends of sensor
near 5V or 0V?
Replace PCB
yes
yes
yes
yes
no
no
no
replace EEPROM
start
re-set
3
)
EEPROM failure
Is EEPROM in mainboard
inversely connected or in
poor contact?
no
Power on again to
check if failure is
eliminated
no
replace PCB
-161-
Summary of Contents for AB072XCBAA
Page 21: ... a__WcU S c a V e a Wc AU84NXTBAA 66 33 1 23 4 43 33 61 2 3 160 2 15 3 52 21 ...
Page 138: ... a__WcU S c a V e a Wc AU282XHBAA AU422XIBAA PCB printed diagram 138 ...
Page 141: ... a__WcU S c a V e a Wc AU84NXTBAA PCB printed diagram 141 ...
Page 144: ... a__WcU S c a V e a Wc AB AE AD units PCB printed diagram 144 ...
Page 149: ... a__WcU S c a V e a Wc AF07 142XCBAA PCB printed diagram 149 ...
Page 180: ...MEMO Commercial Air Conditioner ...