Download 9. Troubleshooting

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Malfunction of outdoor fan (when outdoor fan is blocked or
not connected- if there are two outdoor fans, L3 indicates
outdoor fan 1 and LA indicates outdoor fan 2)
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Malfunction of DC fan/malfunction of outdoor fan (when outdoor
fan is blocked or not connected- if there are two outdoor fans, L3
indicates outdoor fan 1 and LA indicates outdoor fan 2)
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Start the troubleshooting for
temperature sensor
Check whether the
temperature sensor and wiring terminal
Yes
is loosened or poorly connected?
Insert the temperature
sensor well
No
No
Check whether the
temperature sensor is normal by
refering the resistance value of
temperature sensor
Yes
Is mafunction eliminated?
Replace the controlle with
the same model
End
Yes
Replace temperature with
the same mode
No
Yes
No
Is mafunction
eliminated?
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Communication malfunction
for some indoor unit
Disconnect the power, and
check connection wire for indoor
and outdoorunits and wires inside
electric box areconnected
correctly
Connect wires
according to wiring
diagram
No
Wires are connected
correctly?
Yes
Is malfunction
eliminate?
No
Yes
De-energize the unit, exchange the communication
wirefor the indoor unit with normal communication
and the indoor unit with malfunction, energize the
unit and thenwait for 3mins
Whether the indoor unit
resumes normal?
Yes
Replace mainboard of
outdoor unit
No
Replace mainbaord of indoor
unit with malfunction
End
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All indoor units alarms
communication malfunction
Disconnect the power, and check
connection wire for indoor and outdoor
units and wires inside electric box are
connected correctly
Wires are
connected correctly?
Connect wire
connectly according
to wiring diagram
No
Is malfunction eliminated?
Yes
No
Yes
Disconnect the power, and check whether
theconnection wires between mainboard of
outdoorunit and filter palte are connected
correctly byreferring to wiring diagram
Wires are
connected correctly?
Connect wire
connectly according
to wiring diagram
No
Is malfunction eliminated?
Yes
No
Yes
Whether connection
wires are damaged?
Yes
Replace
connection
wires
Is malfunction eliminated?
Yes
No
No
Check whether the neutral
wirefor mainboard of outdoor
unit haspower input
Whether there's
power input?
No
Replace filter plate of
outdoor unit
Is malfunction eliminated?
No
Yes
Replace mainboard of
outdoor unit
Communication is
resumed ?
Yes
End
No
Replace filter plate
of outdoor unit
Yes
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Display displays C5
Check whether the
mainbaord ofcontroller is
inserted with thejumper
cap?
Yes
No
No
Check
whether the jumper cap
is poorly connected?
No
No
Insert the jumper
cap
Is malfunction
eliminated?
Yes
Re-insert the jumper
cap
Is malfunction
eliminated?
Yes
Replace the jumper
cap
Is malfunction
eliminated?
Yes
Yes
No
It's the malfunction
of mainboard,
replacethe
mainboard
End
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Start the
troubleshooting
for H6 malfunction
Check whether the
terminal of DC motor is
connected tightly
No
Insert the motor
terminal tightly
Yes
No
Pull blade
with hand to see
whether
it can rotate
smoothly
No
Re-assemble blade
and motor correctly
Yes
No
Yes
Whether
motor can be started
up
Whether the voltage
on motor feedback
terminal (blue wire)
is more than 1.1V
Yes
Yes
No
Replace controller
Yes
Is mafunction
eliminated?
Energize the unit and turn on the unit.
Afterthe horizontal louver opens for 1
min, measurewhether the input DC
voltage VDC (red wire) of motor is300s,
whether the DC voltageVCC
(white wire0 is 15V and whether the
outputVSP (yellow wire) is more t
han 1.1V. The earthingwire is black wire;
Yes
End
Yes
Is mafunction
eliminated?
Is mafunction
eliminated?
No
No
Replace motor
Yes
Yes