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4. ODU fan motor can not operate
Possible Causes
Discriminating Method (Air Conditioner
Status)
Troubleshooting
Wrong wire connection or poor connection
Check the wiring status according to circuit
diagram
Connect wires according to the wiring diagram
to ensure all wiring terminals are connected
firmly.
Capacity of the ODU fan motor is damage.
Wrong wire connection or poor connection
Measure the capacity of the fan capacitor with
a universal meter and find that the capacity is
out of the deviation range indicated on the
nameplate of the fan capacitor.
Replace the capacity of fan
Power voltage is too or high
Use a universal meter to measure the power
supply voltage. The voltage is a little high or
low
Suggest to equip with voltage regulator
Outdoor unit motor is damaged
When the unit is on, cooling/heating
performance is bad and the ODU compressor
generates a lot of noise and heat.
Change the compressor oil and refrigerant If
no better, replace the compressor with a new
one.
5. Compressor can not operate
Possible Causes
Discriminating Method (Air Conditioner
Status)
Troubleshooting
Wrong wire connection or poor connection
Check the wiring status according to the
circuit diagram
Connect wires according to the wiring diagram
to ensure all wiring terminals are connected
firmly
Capacity of compressor is damaged
Measure the capacity of the fan capacitor with
a universal meter and find that the capacity is
out of the deviation range indicated on the
nameplate of the fan capacitor.
Replace the compressor capacitor
Power voltage is too low or high
Use a universal meter to measure the power
supply voltage. The voltage is a little high or
low
Suggest to equip with a voltage regulator
Compressor coil is burnt out
Use a universal meter to measure the
resistance between the compressor terminals
and its 0
Repair or replace the compressor
Cylinder of compressor is blocked Compressor can not operate Repair or replace the compressor
6. Air conditioner is leaking
Possible Causes
Discriminating Method (Air Conditioner
Status)
Troubleshooting
Drainpipeisblocked Water leaking from indoor unit
Eliminate the foreign objects inside the drain
pipe
Drainpipeisbroken 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 tight
7. Abnormal sound and vibration
Possible Causes
Discriminating Method (Air Conditioner
Status)
Troubleshooting
When turning on or off the unit, the panel and
other parts will expand and there is an
abnormal sound
The unit may make a crackling or popping
noise.
Normal phenomenon. Abnormal sound will
disappear after a few minutes
When turning on or off the unit, there is an
abnormal sound due to the flow of refrigerant
inside the air conditioner
Water-running sound can be heard
Normal phenomenon. Abnormal sound will
disappear after a few minutes
Foreign objects inside the indoor unit or there
are parts touching together inside the indoor
unit
There is an abnormal sound coming from the
indoor unit
Remove the foreign objects. Adjust all parts
positions of indoor units, tighten screws and
stick damping plaster between connected
parts.
Foreign objects inside the outdoor unit or there
are parts touching together inside the outdoor
unit
There is an abnormal sound coming from the
outdoor unit
Remove the foreign objects. Adjust all parts
positions of outdoor units, tighten screws and
stick damping plaster between connected
parts.
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, reduce refrigerant properly,
Replace compressor for other circumstances.
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