Vertical Exposed Fan Coil Unit
24
5 Troubleshooting
No.
Symptoms
Possible causes
Corrective measures
1
The unit does
not run.
There is no power supply.
Repower the unit when power supply is
available.
The power plug is loosened.
Tighten the power plug.
The motor is burnt out.
Replace the motor and check for the wiring
2
There is
abnormal noise.
The volute or blade is deformed, or
the volute contacts the blade.
Replace the volute or the blade.
The air filter is clogged.
Clean the filter.
There are foreign matters at the
inlet/outlet or inside the duct.
Remove foreign matters.
There is abnormal noise from the
motor.
Replace the motor.
The fastening screws are loosened.
Tighten them.
3
The airflow rate
is too low.
The air filter is clogged.
Clean the air filter.
There are foreign matters at the
return inlet and air outlet.
Clear foreign matters.
The duct resistance exceeds the
design value.
Lower the duct resistance or reselect the
unit.
4
The cooling or
heating effect is
poor.
The air filter is clogged.
Clean the air filter.
The dampers are not opened.
Open the dampers.
The fins are clogged or damaged.
Clean or repair fins.
The entering water temperature
cooling is too high and too low for
cooling.
Adjust the entering water temperature.
5
Water leaks.
The condensate pipe is clogged.
Clean the drain pipe.
The unit is not installed as required.
Adjust the unit and let the unit keep a
certain inclination degree.
The environmental air humidity is
too high.
Do humidification and do not let the high-
temperature and high-humidity air coming
into the room.
The fan stops but cold water is
supplied continuously.
Close the water dampers or run the unit.
The discharge valve is not tightened.
Tighten the discharge valve.
