Hokkaido HCNL 821 XMR, Руководство по обслуживанию

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N
OTE
: Float switch is close in normal state, when being activated, it is
open.
Voltage between both ends is
approximately 5V
when open
.
NO
Adjust bracket
Is float switch holder tinted
that float can't move, or too
close to pump motor that
any
interference arise?
Check if float switch is
in good condition with
a
multimeter
Replace
the
float switch
Is
the drain pan too
dirty
to cause the invalid
float
switch
?
Check i
f pump
motor is
normal
C
lean
the
drain pan
R
eplace
the
pump motor
Is drain pipe blocked?
YES C lean the drain pipe
and water pump
Trouble 7:
Fault in drain system
Confirm
the
float switch failure
according to the fault code list
NO
YES
YES
YES
no
NO
NO
YES
Replace indoor PCB
Is
the power
supply transformer
component in good condition?
YES C
heck if wiring
is correct
C
heck if failure disappears after
changing transformer or PCB
NO
NO
C
heck if failure disappears after
changing wired controller
YES W
ired controller
is
broken
Trouble 8:
Communication failure between wired controller and indoor PCB
or no display on wired controller
Confirm commu
n
ication failure
according to the fault code list
or no display
YES
YES F
or some models, when powered on,
during
initialization will display
"
88
"
, if initialization
cannot finish, check indoor dip switch position
no
Is voltage between A and
B of wired controller 12V?
YES YES
YES
Is voltage between B
and C fluctuating?
R
eplace PCB
no
NO
NO
C
heck if the wired controller
can match with indoor PCB
R
eplace wired controller
NO
Is power just turned on?
C
heck if the dip
switch position
on
PCB is right
C
orrect the position
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