Troubleshooting - Embraco Fullmotion CF10C Product Manual

CHAPTER 5. DIAGNOSTICS

5.2 Troubleshooting

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