4. ODU Fan Motor Cant 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 wiring diagram to make sure all
wiring terminals are connected firmly
Capacity of the ODU fan motor is damaged
Measure the capacity of fan capacitor with an
universal meter and find the capacity is out of
deviation range indicated on the nameplate of
fan capacitor.
Replace the capacitor 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 improvement is
made, replace the compressor
5. Compressor Cant 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 wiring diagram to make sure all
wiring terminals are connected firmly
Capacity of compressor is damaged
Measure the capacity of fan capacitor with an
universal meter and find capacity is out of 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
between compressor terminals and its 0
Repair or replace compressor
Cylinder of compressor is blocked
Compressor canot operate
Repair or replace compressor
6. Air Conditioner is Leaking
Possible Causes
Discriminating Method
(Air conditioner Status)
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 at
indoor unit
Wrap it again and bundle it tightly
7. Abnormal Sound and Vibration
Possible Causes
Discriminating Method
(Air conditioner Status)
Troubleshooting
When turning on or turning off the unit,
the panel and other parts will expand and
abnormal sound present
Theres the sound of “PAPA”
Normal phenomenon. Abnormal sound will disappear
after a few minutes.
When turning on or turning off the
unit, there is an abnormal sound
due to flow of refrigerant inside 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 parts touching each other
There is an abnormal sound from indoor
unit
Remove foreign objects. Adjust all parts position of
indoor unit, tighten screws and stick damping plaster
between connected parts
Foreign objects inside the outdoor
unit or parts touching each other
There is an abnormal sound from outdoor
unit
Remove foreign objects. Adjust all parts 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 shaking 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 too much refrigerant was added during
maintenance, reduce refrigerant. Replace compressor
for other circumstances.
