Inventor Air Conditioners L4VI32-16, Руководство по обслуживанию

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Installation and Maintenance
61
Service Manual
78
Installation and Maintenance
Service Manual
Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting
Set temperature is improper Observe the set temperature on remote controller Adjust the set temperature
Rotation speed of the IDU fan
motor is set too low
Small wind blow Set the fan speed at high or medium
Filter of indoor unit is blocked Check the filter to see its blocked Clean the filter
Installation position for indoor unit
and outdoor unit is improper
Check whether the installation postion is proper
according to installation requirement for air
conditioner
Adjust the installation position, and install the
rainproof and sunproof for outdoor unit
Refrigerant is leaking
Discharged air temperature during cooling is
higher than normal discharged wind temperature;
Discharged air temperature during heating is
lower than normal discharged wind temperature;
Units pressure is much lower than regulated
range
Find out the leakage causes and deal with it.
Add refrigerant.
Malfunction of 4-way valve Blow cold wind during heating Replace the 4-way valve
Malfunction of capillary
Discharged air temperature during cooling is
higher than normal discharged wind temperature;
Discharged air temperature during heating is
lower than normal discharged wind temperature;
Unitt pressure is much lower than regulated
range. If refrigerant isnt leaking, part of capillary
is blocked
Replace the capillary
Flow volume of valve is
insufficient
The pressure of valves is much lower than that
stated in the specification
Open the valve completely
Malfunction of horizontal louver Horizontal louver cant swing
Refer to point 3 of maintenance method for
details
Malfunction of the IDU fan motor The IDU fan motor cant operate
Refer to troubleshooting for H6 for maintenance
method in details
Malfunction of the ODU fan motor The ODU fan motor cant operate
Refer to point 4 of maintenance method for
details
Malfunction of compressor Compressor cant operate
Refer to point 5 of maintenance method for
details
9.3 Troubleshooting for Normal Malfunction
1. Air Conditioner Cant be Started Up
2. Poor Cooling (Heating) for Air Conditioner
3. Horizontal Louver Cant Swing
Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting
No power supply, or poor
connection for power plug
After energization, operation indicator isnt bright
and the buzzer cant give out sound
Confirm whether its due to power failure. If yes,
wait for power recovery. If not, check power
supply circuit and make sure the power plug is
connected well.
Wrong wire connection between
indoor unit and outdoor unit,
or poor connection for wiring
terminals
Under normal power supply circumstances,
operation indicator isnt bright after energization
Check the circuit according to circuit diagram
and connect wires correctly. Make sure all
wiring terminals are connected firmly
Electric leakage for air conditionerAfter energization, room circuit breaker trips off at
once
Make sure the air conditioner is grounded
reliably
Make sure wires of air conditioner is connected
correctly
Check the wiring inside air conditioner. Check
whether the insulation layer of power cord is
damaged; if yes, place the power cord.
Model selection for air switch is
improper
After energization, air switch trips off Select proper air switch
Malfunction of remote controller
After energization, operation indicator is bright,
while no display on remote controller or buttons
have no action.
Replace batteries for remote controller
Repair or replace remote controller
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
Stepping motor is damaged Stepping motor cant operate Repair or replace stepping motor
Main board is damaged
Others are all normal, while horizontal louver cant
operate
Replace the main board with the same model
79
Installation and Maintenance
Service Manual
7. Abnormal Sound and Vibration
Possible causes Discriminating method (air conditioner status) Troubleshooting
When turn on or turn off the unit,
the panel and other parts will
expand and theres abnormal
sound
Theres the sound of "PAPA"
Normal phenomenon. Abnormal sound will
disappear after a few minutes.
When turn on or turn off the
unit, theres 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 therere parts touching
together inside the indoor unit
Theres abnormal sound fro 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 therere parts touching
together inside the outdoor unit
Theres abnormal sound fro 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 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.
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 place of
indoor unit
Wrap it again and bundle it tightly
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 that the 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 cant operate Repair or replace compressor
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 that the capacity is out of
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