English (GB)
17
8. Fault finding the product
High-torque start
If the shaft is blocked and you cannot start the pump, the display
indicates the alarm "E 1 - "- -"", with a delay of 20 minutes.
The pump attempts to restart until the pump is powered off.
During the start attempts, the pump vibrates due to the
high-torque load.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before starting any
work on the product. Make sure that the power
supply cannot be accidentally switched on.
CAUTION
Pressurised system
Minor or moderate personal injury
- Before dismantling the pump, drain the system or
close the isolating valves on either side of the
pump. The pumped liquid may be scalding hot
and under high pressure.
Fault Operating panel Cause Remedy
1. The pump does not
run.
Light off. a) A fuse in the installation is blown. Replace the fuse.
b) The current-operated or
voltage-operated circuit breaker has
tripped.
Cut in the circuit breaker.
c) The pump is defective. Replace the pump.
Changes between "- -"
and "E 1".
a) The rotor is blocked.
Remove the impurities.
Changes between "- -"
and "E 2".
a) Insufficient supply voltage. Make sure that the supply voltage falls
within the specified range.
Changes between "- -"
and "E 3".
a) Electrical fault.
Replace the pump.
2. Noise in the system. No warning is indicated
on the display.
a) Air in the system. Vent the system.
See section 5.4 Venting the heating
system.
b) The flow rate is too high. Reduce the suction head.
3. Noise in the pump. No warning is indicated
on the display.
a) Air in the pump. Let the pump run. The pump vents itself
over time.
See section 5.3 Venting the pump.
b) The inlet pressure is too low. Increase the inlet pressure, or make
sure that the air volume in the expansion
tank is sufficient, if installed.
4. Insufficient heat. No warning is indicated
on the display.
a) The pump performance is too low.
Increase the suction head.
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