Bell & Gossett 176R0649C Technologic 502 Series Pump Controller - Manual (Page 53)

53
WARNING 1, 10 volts low
The control card voltage is below 10V from
terminal 50.
Remove some of the load from terminal 50, as
the 10V supply is overloaded. Max. 15 mA or
minimum 590 ohms.
This condition can be caused by a short in a
connected potentiometer or improper wiring of
the potentiometer.
Troubleshooting: Remove the wiring from
terminal 50. If the warning clears, the problem is
with the customer wiring. If the warning does not
clear, replace the control card.
WARNING/ALARM 2, Live zero error
This warning or alarm will only appear if pro-
grammed by the user in parameter 6-01 Live
Zero Timeout Function. The signal on one of the
analog inputs is less than 50% of the minimum
value programmed for that input. This condition
can be caused by broken wiring or faulty device
sending the signal.
Troubleshooting:
Check the connections on all the analog input
terminals. Control card terminals 53 and 54 for
signals, terminal 55 common. Make sure that
the controller programming and switch settings
match the analog signal type.
WARNING/ALARM 3, No motor
No motor has been connected to the output of
the controller. This warning or alarm will only
appear if programmed by the user in parameter
1-80 Function at Stop.
Troubleshooting: Check the connection be-
tween the controller and the motor.
WARNING/ALARM 4, Mains phase loss
A phase is missing on the supply side, or the
mains voltage imbalance is too high. This mes-
sage also appears for a fault in the input rectifier
on the controller. Options are programmed at
parameter 14-12 Function at Mains Imbalance.
Troubleshooting: Check the supply voltage and
supply currents to the controller.
WARNING 5, DC link voltage high
The intermediate circuit voltage (DC) is higher
than the high voltage warning limit. The limit is
dependent on the controller voltage rating. The
controller is still active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is lower
than the low voltage warning limit. The limit is
dependent on the controller voltage rating. The
controller is still active.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the
limit, the controller trips after a time.
Troubleshooting:
Connect a brake resistor
Extend the ramp time
Change the ramp type
Activate functions in parameter 2-10 Brake
Function
Increase parameter 14-26 Trip Delay at Inverter
Fault
WARNING/ALARM 8, DC undervoltage
If the intermediate circuit voltage (DC) drops be-
low the undervoltage limit, the controller checks
if a 24V backup supply is connected. If no 24V
backup supply is connected, the controller trips
after a fixed time delay. The time delay varies
with unit size.
Troubleshooting:
Make sure that the supply voltage matches the
controller voltage.
WARNING/ALARM 9, Inverter overloaded
The controller is about to cut out because of an
overload (too high current for too long).
The counter for electronic, thermal inverter
protection gives a warning at 98% and trips at
100%, while giving an alarm. The controller can-
not be reset until the counter is below 90%. The
fault is that the controller is overloaded by more
than 100% for too long.
Troubleshooting:
Compare the output current shown on the LCP
with the controller rated current.
Compare the output current shown on the LCP
with measured motor current.
Display the Thermal Drive Load on the LCP
and monitor the value. When running above the
controller continuous current rating, the coun-
ter should increase. When running below the
controller continuous current rating, the counter
should decrease.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection
(ETR), the motor is too hot. Select whether the
controller should give a warning or an alarm
when the counter reaches 100% in parameter
1-90 Motor Thermal Protection. The fault is that
the motor is overloaded by more than 100% for
too long.
Troubleshooting:
Check if motor is overheating.
If the motor is mechanically overloaded.
Table 8-1. Warnings and Alarms