140
PB
TROUBLESHOOTING
Troubleshooting for Malfunction without Active Error Code
Possible Causes
Discriminating Method (Air conditioner Status) Troubleshooting
Air Conditioner will not start up
No power supply, or poor connection for power
plug
After energization, operation indicator isn’t
bright and the buzzer can't give out sound
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.
"Wrong wire connection between indoor unit
and outdoor unit,
or poor connection for wiring terminals"
Under normal power supply circumstances,
operation indicator isn't bright after energiza‑
tion
Check the circuit according to circuit diagram
and connect wires correctly. Make sure all wir‑
ing terminals are connected firmly
Electric leakage for air conditioner
After 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 but‑
tons have no action.
Replace batteries for remote controller Repair
or replace remote controller
Poor Cooling (Heating) for Air Conditioner
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 it's 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 tem‑
perature; Discharged air temperature during
heating is lower than normal discharged wind
temperature; Unit's 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 tem‑
perature; Discharged air temperature during
heating is lower than normal discharged wind
temperature; Unit't pressure is much lower
than regulated range. If refrigerant isn’t leak‑
ing, 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 can’t swing
Refer to point 3 of maintenance method for
details
Summary of Contents for FSHW091
Page 8: ...8 INTRODUCTION FSHSW09A1A FSHSW12A1A Figure 102 Indoor Units FSHSW18A3A FSHSW24A3A FSHSW36A3A ...
Page 47: ...47 INSTALLATION ...
Page 48: ...48 INSTALLATION Installation Tools ...
Page 72: ...72 WIRED CONTROLLER Display ...
Page 122: ...122 TROUBLESHOOTING Malfunction of IDUFanMotorU8 Service Manual No Start End ...
Page 146: ...146 WIRING DIAGRAMS Figure 8054 9 12KOutdoorUnitWiringDiagrams 60000706067401 3 2 N 1 C3 C4 ...
Page 158: ...158 FIgure 906 PARTS CATALOG 9KOutdoorUnit 28 27 29 31 30 32 ...
Page 160: ...160 PARTS CATALOG 12k OutdoorUnit 28 27 29 31 30 32 FIgure 907 ...