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11) Fault in drain system
confirm the malfunction
according to the fault code list
no
yes
Replace water
pump
yes
yes
Clean drain pan
no
Is float switch holder tinted
that float can't move, or too
close to pump motor that
interference arises?
yes
Adjust holder
no
yes
Replace float
switch
no
Replace indoor
PCB
Note: Float switch is close in normal state, when being activated, it is open.
Voltage between both ends is 0V when close, approximately 5V when open.
Unclog pipe and
water pump
Is drain pan dirty and
float switch ineffective?
Is pump motor in
good condition?
Is drain pipe clogged?
yes
Check if float switch is in good
condition with multimeter
-167-
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 ...