Bell & Gossett 176R0649C Technologic 502 Series Pump Controller - Manual (Page 54)

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Motor parameter 1-24 Motor Current is set cor-
rectly.
Motor data in parameters 1-20 through 1-25 are
set correctly.
The setting in parameter 1-91 Motor External
Fan.
Run AMA in parameter 1-29 Automatic Motor
Adaptation (AMA).
WARNING/ALARM 11, Motor thermistor overtemp
The thermistor or the thermistor connection is
disconnected. Select whether the controller
gives a warning or an alarm when the counter
reaches 100% in parameter 1-90 Motor Thermal
Protection.
Troubleshooting:
Check if motor is overheating.
Check if the motor is mechanically overloaded.
Check that the thermistor is connected correctly
between terminal 53 or 54 (analog voltage input)
and terminal 50 (+10V supply), or between
terminal 18 or 19 (digital input PNP only) and
terminal 50.
If a KTY sensor is used, check for correct con-
nection between terminal 54 and 55.
If using a thermal switch or thermistor, check
the programming of parameter 1-93 Thermistor
Resource matches sensor wiring.
If using a KTY sensor, check the programming of
parameters 1-95, 1-96, and 1-97 match sensor
wiring.
WARNING/ALARM 12, Torque limit
The torque is higher than the value in parameter
4-16 Torque Limit Motor Mode (in motor opera-
tion) or the torque is higher than the value in
parameter 4-17 Torque Limit Generator Mode (in
regenerative operation). parameter 14-25 Trip
Delay at Torque Limit can be used to change
this from a warning only condition to a warning
followed by an alarm.
WARNING/ALARM 13, Overcurrent
The inverter peak current limit (approx. 200%
of the rated current) is exceeded. The warning
lasts about 1.5 sec., then the controller trips and
issues an alarm. If extended mechanical brake
control is selected, trip can be reset externally.
Troubleshooting:
This fault may be caused by shock loading or
fast acceleration with high inertia loads.
Turn off the controller. Check if the motor shaft
can be turned.
Make sure that the motor size matches the
controller.
Incorrect motor data in parameters 1-20 through
1-25.
ALARM 14, Earth (ground) fault
There is a discharge from the output phases to
earth, either in the cable between the frequency
converter and the motor or in the motor itself.
Troubleshooting:
Turn off the controller and remove the earth
fault.
Measure the resistance to earth of the motor
leads and the motor with a meter to check for
earth faults in the motor.
ALARM 15, Hardware mismatch
A fitted option is not operational with the pres-
ent control board hardware or software. Contact
your supplier.
ALARM 16, Short circuit
There is short-circuiting in the motor or on the
motor terminals. Turn off the controller and re-
move the short-circuit.
WARNING/ALARM 17, Control word time-out
There is no communication to the controller. The
warning will only be active when parameter 8-04
Control Word Timeout Function is NOT set to
OFF. If parameter 8-04 Control Word Timeout
Function is set to Stop and Trip, a warning ap-
pears and the controller ramps down until it trips,
while giving an alarm.
Troubleshooting:
Check connections on the serial communication
cable.
Increase parameter 8-03 Control Word Timeout
Time.
Check the operation of the communication
equipment.
Verify a proper installation based on EMC re-
quirements.
WARNING 22, Hoist mechanical brake
The report value will show what kind it is.
0 = The torque reference was not reached be-
fore time-out.
1 = There was no brake feedback before the
time-out.
WARNING 23, Internal fan fault
The fan warning function is an extra protec-
tive function that checks if the fan is running/
mounted.
The fan warning can be disabled in parameter
14-53 Fan Monitor ([0] Disabled).
Troubleshooting:
Check fan resistance.
Check soft charge fuses.
Table 8-1. Warnings and Alarms (continued)