Group 19, Motor Controls
SM 765, Dec ’06 CONTROL TROUBLESHOOTING • 19-3-13
Fault
Code
Fault Name Fault Description Control Troubleshooting
Action
Required
182 “MOTOR
LOCKED”
Pump motor
locked up
PUMP • After 15 seconds of the motor being
stalled with maximum current, controller
reduces maximum current to 50%.
• Check to see that the pump contactor is
pulled in
• Possible bad encoder(Sensor, Bearing)
195 "STBY I
HIGH"
Wrong voltage in
current sensor
feedback circuit
PUMP • The microprocessors verify if the feed-
back of current sensor device output is
within the zero current window. Possible
causes of the fault;
• Current sensor failure.
• Failure in the logic card: If the fault per-
sist, replace the power unit.
196 "THERMIC
SENSOR
KO"
Warning: Pump
temperature sen-
sor is our of
range
PUMP • The range of the temperature sensor is
always checked and a warning is sig-
naled if it is out of range. This fault will
reduce the maximum current output of
the controller to 50%.
201 "ENCODER
ERROR"
Motor speed sen-
sor (encoder) does
not work properly
PUMP • This fault indicates that the frequency
supplied the motor is greater that 20 Hz,
and the signal feedback from the encoder
has a jump higher than 20 Hz in less than
ten milliseconds. This condition clearly
shows a malfunctioning of the encoder
signal. Check encoder wiring; if no fault
is found in the wiring.
Replace
encoder
202 "CAP
CHARGE"
Power Capacitor
Voltage does not
increase when the
key is turned ON;
failure in power
section, or in
Logic PCB, or in
driver PCB, or in
the motor
PUMP • When key is switched on, the inverter
tries to charge the capacitors through a
power resistor, and check if the capacitor
is charged (1/2 battery volts) within a
timeout. If they do not charge, a fault is
signaled; the line contactor does not
close.
• The charging resistor is open
• The charging circuit has a failure
• There is a problem in the power section.
• Possible Motor connection open.
203 "HIGH
TEMPERA-
TURE"
Warning: Pump
Controller tem-
perature higher
that 75 degrees C
PUMP • Temperature of control is greater than
75°C. Maximum current reduced propor-
tionally to the temperature increase. At
100°C the maximum current of both con-
trols is reduced to zero.
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