AmeriWater SCALA2 Handbuch für Betrieb und Wartung - Seite 11
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FAULT FINDING
5
FAULT FINDING
CAUTION:
This section provides general details for diagnosing possible faults that may occur
during normal operation. Some of the remedial actions can only be carried out by qualified
personnel. Do not attempt to carry out any action if it involves inspecting / replacing an
electrical / mechanical component without first contacting AmeriWater for advice. Please be
aware that the unit / system may still be under pressure and contain water at scalding
temperature under certain fault conditions. When investigating any alarm, take appropriate
precautions to prevent possible injury. NEVER attempt to dismantle the unit under these
conditions. Always contact AmeriWater for advice.
5.1 Fault Finding Chart for Grundfos® SCALA2 Pump
Fault
The pump is not
running.
The pump is
running.
The pump
performance is
insufficient.
9
Power supply failure.
-
-
The power supply is out of
Yes
prescribed voltage range.
The shaft seal has seized up or the
pump is blocked by impurities
No
Dry running.
Yes
The maximum runtime has been
No
exceeded.
The internal non-return valve is
No
defective or blocked in completely or
partly open position.
1. Leakage from the pipe system, or
the non-return valve is not properly
closed due to impurities.
-
2. Small continuous consumption.
The temperature of the pump and
-
water is below 37 °F.
1. The pump inlet pressure is too
low.
2. The pump is undersized.
3. The inlet pipe, the inlet strainer or
-
-
the pump is partly blocked by
impurities.
4. There is a leakage in the inlet
pipe.
Cause
Switch on the power supply.
Check the cables and cable connections
for defects and loose connections and
check for blown fuses in the electrical
installation.
Check the power supply and the pump
nameplate. Reestablish the power supply
within the prescribed voltage range.
The end cover incorporates a plug which
can be removed by means of a suitable
tool. This makes it possible to deblock the
pump shaft if it has seized up as a result
of inactivity.
Check the water source, and prime the
pump.
Check the installation for leakage and
reset the alarm.
Clean, repair or replace the non-return
valve.
1. Check and repair the pipe system, or
clean, repair or replace the non-return
valve.
2. Check the taps and reconsider the
usage pattern (ice machines, water
evaporators for air-conditioning, etc.).
Consider protecting the pump and the
installation against frost.
1. Check the inlet conditions of the pump.
2. Replace the pump with a bigger pump.
3. Clean the inlet pipe or the pump.
4. Repair the inlet pipe.
5. Prime the inlet pipe and the pump.
Check the inlet conditions of the pump.
6. Increase the pressure setting (arrow
up).
SCALA2 BOOSTER PUMP
Remedy
98-2039 Rev A