Hubbell Electric Heater Company J User Manual
Page 28
28
GENERAL TROUBLESHOOTING
Symptom Probable
Cause
Corrective
Action
Water reaches setpoint
temperature but does
not last through the
entire dishwasher
cycle.
Low incoming water
temperature.
Incoming water temperature must be
adequate for the booster size. Increase the
incoming water temperature.
Incoming water
temperature is dropping.
Primary water supply is not adequate to
continually provide correct temperature in
sufficient quantities. Increase the supply of
primary warm water.
Water pressure is too
high.
Higher water pressure uses an excessive
supply of hot water. Verify a pressure
reducing valve is installed and adjust the
water pressure to 20 psi.
Booster heater may be
undersized.
The booster heater must be properly sized
for the incoming water and rinse
requirements of the dishwasher. If required,
replace with a properly sized unit.
Incorrect voltage.
Voltage available at the booster heater must
be correct for unit. Verify voltage on all
phases matches nameplate on the booster
heater.
If two magnetic
contactors are utilized,
one is not energizing.
Verify that both magnetic contactors are
operating. If not, see the ‘Magnetic
Contactor Troubleshooting’ section.
One or more elements
are not energizing.
Verify that each element is drawing the
correct amperage. Replace elements as
required.
Water at the
dishwasher is not the
proper temperature.
Gauge(s) not reading
correctly.
Check the temperature of the water with a
thermometer to verify the gauges are
working properly. Replace gauges, if
required.
Temperature setpoint
too low.
Adjust the temperature setpoint.
Booster heater piping to
the dishwasher is not
insulated.
If there is more than 5 linear feet of piping
between the booster heater and the
dishwasher the piping should be wrapped
in insulation or a recirculating system
should be installed.
Bypass valve is open or
allowing water to pass
when closed.
Verify that the bypass valve between the
hot and warm water lines is closed. If
condition continues, replace the bypass
valve.