Fault Finding The Product; Technical Data - Grundfos SLC Series Installation And Operating Instructions Manual

11. Fault finding the product

WARNING
Arc flash and electric shock hazard
Death or serious personal injury
- Wear appropriate personal protective equipment
(PE) and tools while working on this equipment.
DANGER
Electric shock
Death or serious personal injury
- Before starting any work on the product, pumps,
pits, etc., make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
Fault
1. The pump does not run.
2. The pump is starting/
stopping too frequently.

12. Technical data

Voltage tolerance
Mains frequency
Ambient temperature
Enclosure class
Outputs for alarm devices
Approvals
42
Cause
a) No power supply.
Without battery back-up:
None of the indicator lights are on.
With battery back-up (accessory):
The indicator lights are on.
b) The Automatic/Manual/Off toggle switch is in the
Off position.
c) The control circuit fuses are blown.
d) The overload relay has cut out the pump (the red
indicator light for pump fault is permanently on).
e) The overtemperature sensor in the motor windings
has cut out the pump. The red indicator light for
pump fault is flashing.
f) The control circuit for the overload relay has been
broken or fails (the green indicator light indicating
pump operation is permanently on).
g) The motor/supply cable is defective.
h) The float switch(es) is (are) defective.
a) The float switch(es) is (are) defective.
-15 % / +10 % of rated voltage (3 x 208/230 VAC, 3 x 460 VAC), 3 x 575 VAC)
+10 % / -1 % of rated voltage (1 x 230 VAC)
60 Hz
During operation: -22 °F to +122 °F (-30 °C to +50 °C) (must not be exposed to direct sunlight)
During transport and storage: -22 °F to +140 °F (-30 °C to +60 °C)
NEMA4X
Maximum 120 VAC / maximum 8 A / minimum 10 mA / AC 1
NO/NC contact
Listed per UL 508A
CAUTION
Toxic material
Minor or moderate personal injury
- Before starting any work on pumps used to pump
liquid which could be constituted as being
hazardous to health, clean and vent pumps, pits,
etc. thoroughly according to local regulations.
See also the Installation and Operating Instructions
for the pump in question.
Remedy
Switch on the power supply.
Push the Automatic/Manual/Off toggle switch to
Manual or Automatic.
Check and eliminate the cause.
Replace the control circuit fuses.
Check the pump/pit.
Allow the pump to cool. After the pump cools, it
will restart automatically unless the SLC or DLC
toggle switch has been set to Manual. If so, the
Automatic/Manual/Off toggle switch must be
pushed into position Off for a short period.
If the pump cut off was caused by choked level
switches, these must be cleaned or replaced.
Check the control circuit.
Check motor and cable.
Check cables and float switches.
Check cables and float switches frequently.