36
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.there's.abnormal.
sound.
There's.the.sound.of."PAPA"
Normal.phenomenon..Abnormal.sound.will.
disappear.after.a.few.minutes..
When.turn.on.or.turn.off.the.unit,.
there's.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.there're.parts.touching.
together.inside.the.indoor.unit.
There's.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.there're.parts.touching.
together.inside.the.outdoor.unit.
There's.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 can't 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.it's.0
Repair.or.replace.compressor
Cylinder.of.compressor.is.blocked.Compressor.can't.operate.
Repair.or.replace.compressor.
4. ODU fan Motor can't 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
