Embraco Fullmotion CF10C - Troubleshooting

CHAPTER 5. DIAGNOSTICS 40
5.2 Troubleshooting
The following tables shows some possible problems and the best action to deal with
them.
Compressor does not start
Problem Action
Compressor disconnected from the
inverter.
·Verify compressor cable connection.
No AC power supply; or wrong
voltage/terminals connected.
·Verify AC input cable connection and
measure AC input voltage.
No control signal input or bad
connection.
·Verify control input cable connection
and measure the signal from the
thermostat.
Blown fuse (due to previous major
failure).
·Return the unit to manufacturer,
replacing it by new one.
Open compressor motor winding.
·Measure winding for open circuit
between all pair of pins on the hermetic
terminal. If any winding is open, return
compressor to manufacturer.
Compressor with locked rotor (due to
mechanical damage).
·Replace compressor by new one and
test for conrmation. Return damaged
unit to manufacturer.
Dropped, damaged, burnt inverter.
·Replace by new one and test for
conrmation. Return damaged unit to
manufacturer.
Inverter on waiting time aſter failed start.
·Wait the necessary time or reset the
inverter disconnecting it from the AC
power supply. The reset time is about
50s.
Demagnetized rotor (only if compressor
was previously connected directly to the
AC power supply).
·Replace compressor by a new one and
test for conrmation. Return damaged
unit to manufacturer.
Unequaled pressures between discharge
and suction pressures in the refrigerating
system.
·Allow the Inverter to equalize pressure
between suction and discharge sides.
Low input voltage supplied to the
inverter.
·Measure AC voltage to conrm.