Troubleshooting
AWZB and PW Auto Self-priming Pump
Fault
Cause
Remedy
The electric pump
cannot be halted
when water is not
used
1. The water level is lower than
the pump suction
2. The pressure of the water
outlet pipeline is lower than the
switch stop pressure and
cannot ensure the switch is
completely cut off
3. The water pump is used to
pump circulating water
4. There is no valve at the water
outlet pipeline of the electric
pump and the water is directly
pumped into the water tank
1. Reduce the installation height of the
pump
2. Ask the profession personnel to properly
turn down the switch pressure value, first
cut off the power, remove the pressure
switch cover and use the screwdriver to
slowly turn it in the “-“ direction to an
appropriate position
3. Manually control the power switch
4. Install a valve on the water outlet
pipeline or equip a float switch in the water
tank
The electric pump
does not start
when water is
used
The pressure of the water inlet
and outlet pipeline is higher
than the starting pressure of
the pressure switch
Ask the profession personnel to properly
adjust the switch pressure value, first cut
off the power, remove the pressure switch
cover and use the screwdriver or wrench to
slowly turn it in the “+“ direction to an
appropriate position
The electric pump
is started
frequently when
water is used
1. The pressure fluctuation
range of the pipeline networks
of the tap water is overlarge
2. The water discharge of the
faucet is obviously less than
the water inflow
3. There is slight leakage
phenomenon at the mechanical
seal, check valve or pipeline of
the electric pump
4. The start/stop pressure
range of the pressure switch is
not consistent with the actual
working conditions
5. The pressure tank leaks air
and the air pressure is
insufficient, so it has no buffer
function
1. When the pressure of the pipeline
networks of the tap water is not stable,
please adjust the start/stop pressure
range of the pressure switch to the
maximum limit according to the actual
condition during the water consumption
peak period
2. Adjust the valve on the water inlet
pipeline of the electric pump to make the
water inlet and outlet flow of the electric
pump basically balanced
3. Find out the leakage point and treat it
until it is completely sealed
4. Ask the professional personnel to or
under the guidance of the professional
personnel, adjust the start/stop pressure
range of the pressure switch to meet the
actual working conditions; or select a 19L
or bigger pressure tank
5. Refill the pressure tank with air as per
the pressure value on the tag of the
pressure tank
19
