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No power
Water alarm
Power supply cord
Transformer (Discharge
transformer before testing)
Wire disconnected or
Fan motor will not
connection loose
run.
Main PCB failure
Capacitor (Discharge
capacitor before testing)
Will not rotate
Fan blower
Loose screws
Fan motor noise.
Worn bearings
Voltage
Wiring
Compressor will not
Main PCB failure
run while fan motor
Capacitor (Discharge
runs.
capacitor before testing)
Room temp sensor
Compressor
Excessive noise.
Copper tubing
Water tank full
Water depth sensor if failure
Water pump failure
Water full alarm
Water depth is over load in
chassis
Water depth sensing
structure
Check voltage at electrical outlet. Correct if none.
Check and correct if water alarm happens.
Check voltage at the power cord terminal on Main PCB. Replace
the power cord if none.
Check resistance between the two input/output lines on
transformer. Replace the transformer if either of the input/output
is open or the transformer is damaged.
Connect wire. Refer to wiring diagram for terminal identification.
Repair or replace loose terminal.
Select fan speed and Check the voltage on main PCB. Replace
the main PCB if no voltage in anyone.
Test capacitor.
Replace if not within +/-10% of manufacture's rating. Replace if
shorted, open or damaged.
Fan blower hitting scroll. Realign assembly.
Check fan motor bearings. Replace the motor if motor shaft do
not rotate.
Replace the fan blower if cracked, out of balance, or partially
missing.
Tighten them.
Replace the motor if knocking sounds continue when running or
loose, or the motor hums or noise appears to be internal while
running.
Check voltage. Call Supply Authority if not within limits.
Check the wire connections, if loose, repair or replace the
terminal. If wires are off, refer to wiring diagram for identification,
and replace. Check wire locations. If not per wiring diagram,
correct.
Check voltage of main PCB. Replace the main PCB if open.
Check the capacitor.
Replace if not within +/-10% of manufacturers rating. Replace if
shorted, open, or damaged.
Check the temperature setting if not at the coolest (in cooling
mode) or the warmest (in heating mode). Set it if not.
Check the compressor for open circuit or ground. If open or
grounded, replace the compressor.
Remove the cabinet and carefully rearrange tubing not to contact
cabinet, compressor, shroud and barrier.
Check and pour if the water tank is full.
Check and replace if failure.
Check and replace if the pump if failure.
Check and drainage the water in the chassis by open the
drainage hose on the chassis.
Check and replace or realign if the structure is failure.
6
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