Friedrich KP05A10 KP06A10 Service And Parts Manual page 20

COMPLAINT
Fan motor noise.
Compressor will not run,
fan motor runs.
Compressor cycles on
overload.
CAUSE
Fan
Blower
Loose set screw
Worn bearings
Voltage
Wiring
Thermistor
Capacitor (discharge
capacitor before
servicing.)
Compressor
Overload
Voltage
Overload
—20—
REMEDY
If cracked, out of balance, or partially missing,
replace it.
If cracked, out of balance, or partially missing,
replace it.
Tighten it.
If knocking sounds continue when running or
loose, replace the motor. If the motor hums or
noise appears to be internal while running,
replace motor.
Check voltage. See the limits on the preceding
page. If not within limits, call an electrician.
Check the wire connections; if loose, repair or
replace the terminal. If the wires are discon-
nected, refer to wiring diagram for identification,
and replace the wires. Check the wire connections;
If not according to the wiring diagram, correct
the connections.
Check the TEMP control. If not at the lowest
number, set TEMP control to this setting and
restart the unit.
Check the continuity of the thermistor. Replace
the thermistor if the circuit is open.
Check the capacitor.
Replace if not within ±10% of manufacturer's
rating, replace if shorted, open, or damaged.
Check the compressor for open circuit or
ground. If open or grounded, replace the
compressor.
Check the compressor overload if externally mounted.
Replace if open. (If the compressor temperature is
high, remove the overload, cool, and retest.)
Check the voltage. See the limits on the
preceding page. If voltage is not within these limits,
call an electrician.
Check overload, if externally mounted.
Replace if open. (If the compressor temperature
is high, remove the overload, cool, and retest.)