30
7. Abnormal Sound and Vibration
Possible causes
Discriminating
M
ethod (
A
ir
C
onditioner
S
tatus)
Troubleshooting
When turn on or turn off the unit,
the panel and other parts will
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sound
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Normal phenomenon. Abnormal sound will
disappear after a few minutes.
When turn on or turn off the unit,
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conditioner
Water-running sound can be heard
Normal phenomenon. Abnormal sound will
disappear after a few minutes.
Foreign objects inside the indoor
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together inside the indoor unit
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5HPRYHIRUHLJQREMHFWV$GMXVWDOOSDUWV
position of indoor unit, tighten screws and stick
damping plaster between connected parts
Foreign objects inside the outdoor
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together inside the outdoor unit
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5HPRYHIRUHLJQREMHFWV$GMXVWDOOSDUWV
position of outdoor unit, tighten screws and
stick damping plaster between connected parts
Short circuit inside the magnetic
coil
During heating, the way valve has abnormal
electromagnetic sound
Replace magnetic coil
Abnormal shake of compressor
Outdoor unit gives out abnormal sound
Adjust the support foot mat of compressor,
tighten the bolts
Abnormal sound inside the
compressor
Abnormal sound inside the compressor
If add too much refrigerant during maintenance,
please reduce refrigerant properly. Replace
compressor for other circumstances.
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Possible causes
Discriminating
M
ethod (
A
ir
C
onditioner
S
tatus)
Troubleshooting
Drain pipe is blocked
Water leaking from indoor unit
Eliminate the foreign objects inside the drain
pipe
Drain pipe is broken
Water leaking from drain pipe
Replace drain pipe
Wrapping is not tight
Water leaking from the pipe connection place of
indoor unit
Wrap it again and bundle it tightly
5. Compressor
Doesn't
Operate
Possible causes
Discriminating
M
ethod (
A
ir
C
onditioner
S
tatus)
Troubleshooting
Wrong wire connection, or poor
connection
Check the wiring status according to circuit
diagram
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
¿UPO\
Capacity of compressor is
damaged
Measure the capacity of fan capacitor with an
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the deviation range indicated on the nameplate of
fan capacitor.
Replace the compressor capacitor
Power voltage is a little low or
high
Use universal meter to measure the power supply
voltage. The voltage is a little high or low
Suggest to equip with voltage regulator
Coil of compressor is burnt out
Use universal meter to measure the resistance
EHWZHHQFRPSUHVVRUWHUPLQDOVDQGLWV
Repair or replace compressor
Cylinder of compressor is blocked
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Repair or replace compressor
4. ODU Fan Motor
Doesn't
Operate
Possible causes
Discriminating
M
ethod (
A
ir
C
onditioner
S
tatus)
Troubleshooting
Wrong wire connection, or poor
connection
Check the wiring status according to circuit
diagram
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
¿UPO\
Capacity of the ODU fan motor is
damaged
Measure the capacity of fan capacitor with an
XQLYHUVDOPHWHUDQG¿QGWKDWWKHFDSDFLW\LVRXWRI
the deviation range indicated on the nameplate of
fan capacitor.
Replace the capacity of fan
Power voltage is a little low or
high
Use universal meter to measure the power supply
voltage. The voltage is a little high or low
Suggest to equip with voltage regulator
Motor of outdoor unit is damaged
When unit is on, cooling/heating performance
is bad and ODU compressor generates a lot of
noise and heat.
Change compressor oil and refrigerant. If no
better, replace the compressor with a new one
Содержание DHW18CMB21S
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