Hokkaido HCNL 821 XMR, Руководство по обслуживанию

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A
djust the
distance and
check again
R
eplace the
communication
connection wire,
then
check again
PCB is faulty,
replace
it
and
check again
I
f the power cable and the
communication wire are
too close, resulting in the
wrong data
transmission
C
heck if the
communication port
connecting to the
indoor/outdoor PCB is
in open circuit
R
e-wiring, and
check again
NO
NO
YES
YES
YES
A
s per the wiring
diagram, check if
communication
wiring is correct
S
tart
Trouble 3: Communication failure between indoor and outdoor
NO
R
eplace fan motor
feedback port, cut off
power supply and be
electrified again
R
eplace fan motor
input port, cut off
power supply and
electr
ify
again
PCB is faulty
,
replace it
C
heck the fan motor
feedback wire is
fixed badly (CN
4
on PCB)
YES
YES
NO
NO
C
heck if the fan
motor input
connection is fixed
badly
(CN
4
on PCB)
Trouble 6: Indoor fan motor failure, AC fan motor has not 50Hz zero-crossing detection
Trouble 5: Indoor repeated unit number
. If the infrared remote controller YR-H71 is present, proceed as follows.
Trouble 4: Indoor PCB EEPROM data is wrong
1.If the failure occurs when electrif
ying
for the first time, that shows EEPROM
(
8-bit pin)
is
not fixed firmly or
it is
damaged.
2.If the failure occurs when running, that shows EEPROM is faulty and need
s
to be replaced.
1.Firstly query the unit number: switch off the unit, press SLEEP for about
20
seconds until the buzzer sounds 5 times,
The Timer lamp on the panel of the unit will flash according to the address number
.
By this method, you can check if
there is repeated unit
number, if yes, please re-set the number as per the unit number setting procedure.
2.Re-set the unit number directly, the unit with outdoor pipe A is No. 1; the unit with outdoor pipe B is No. 2; the unit
with pipe C is No.3
; the unit with outdoor pipe D is No. 4.
S
tart
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