Troubleshooting For Normal Malfunction - Sharp AY-X36RU Service Manual

Air conditioner can't be started up
1.
Possible Causes
No power supply, or poor con-
nection for power plug
W r o n g w i r e c o n n e c t i o n
between indoor unit and out-
door unit, or poor connection
for wiring terminals.
Electric leakage for air condi-
tioner.
Model selection for air switch
is improper.
Malfunction of remote con-
troller.
Poor Cooling (Heating) for Air Conditioner
2.
Possible Causes
Set temperature is improper.
Rotation speed of the IDU
fan motor is set too low.
Filter of indoor unit is blocked. Check the filter to see it's blocked.
I n s t a l l a t i o n p o s i t i o n f o r
indoor unit and outdoor unit
is improper.
Refrigerant is leaking.
Malfunction of 4-way valve.
Malfunction of capillary.
F l o w v o l u m e o f v a l v e i s
insufficient.
Malfunction of horizontal lou-
ver.
Malfunction of the IDU fan
motor
Malfunction of the ODU fan
motor
Malfunction of compressor
Horizontal Louver Can't Swing
3.
Possible Causes
Wrong wire connection, or
poor connection
Stepping motor is damaged
Main board is damaged

[3] Troubleshooting for Normal Malfunction

Discriminating Method (Air conditioner Status)
After energization, operation indicator isn't bright
and the buzzer can't give out sound.
Under normal power supply circumstances, opera-
tion indicator isn't bright after energization.
After energization, room circuit breaker trips off at
once.
After energization, air switch trips off
After energization, operation indicator is bright,
while no display on remote controller or buttons
have no action.
Discriminating Method (Air conditioner Status)
Observe the set temperature on remote controller.
Small wind blow.
Check whether the installation position is proper
according to installation requirement for air condi-
tioner.
Discharged air temperature during cooling is higher
than normal discharged wind temperature; Dis-
charged air temperature during heating is lower
than normal discharged wind temperature; Unit's
pressure is much lower than regulated range.
Blow cold wind during heating.
Discharged air temperature during cooling is higher
than normal discharged wind temperature; Dis-
charged air temperature during heating is lower
than normal discharged wind temperature; Unit't
pressure is much lower than regulated range. If
refrigerant isn't leaking, part of capillary is blocked.
The pressure of valves is much lower than that stat-
ed in the specification.
Horizontal louver can't swing.
The IDU fan motor can't operate.
The ODU fan motor can't operate.
Compressor can't operate.
Discriminating Method (Air conditioner Status)
Check the wiring status according to circuit dia-
gram.
Stepping motor can't operate
Others are all normal, while horizontal louver can't
operate
Confirm whether it's 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.
Check the circuit according to circuit diagram
and connect wires correctly. Make sure all wir-
ing terminals are connected firmly.
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..
Select proper air switch.
Replace batteries for remote controller.
Repair or replace remote controller.
Adjust the set temperature.
Set the fan speed at high or medium.
Clean the filter.
Adjust the installation position, and install the
rainproof and sun-proof for outdoor unit.
Find out the leakage causes and deal with it.
Add refrigerant.
Replace the 4-way valve.
Replace the capillary.
Open the valve completely.
Refer to point 3 of maintenance method for
details.
Refer to troubleshooting for H6 for maintenance
method in details
Refer to point 4 of maintenance method for
details.
Refer to point 5 of maintenance method for
details.
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
firmly
Repair or replace stepping motor
Replace the main board with the same model
29
AY-X36RU
AE-X36RU
Troubleshooting
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