Bradford White MAGNUM Series Installation And Operating Manual page 18

TROUBLESHOOTING GUIDE
Symptom
Water at dish machine is not at the
proper temperature.
Heating elements burn out.
Relief valve dribbles.
Relief valve opens.
High temperature limit trips.
Chattering contactor or low water
cutoff circuit board.
Probable Cause
Gauge(s) not working properly.
Thermostat set too low.
Booster heater has more than 5
linear feet (1524 mm) of water pipe
to the dishwasher, causing the water
to cool off inside the pipe.
Tank inadvertently drained leaving
elements in a dry condition.
Lime buildup in tank
elements to split and burn out.
No pressure reducing valve installed
or incorrect valve installed causing
pressure build-up inside booster
tank.
Bypass in pressure reducing valve
may be blocked.
Check valve or anti-siphon valve
installed in the feed line.
Unit is overheating.
Contactor may be sticking in closed
position not allowing unit to cycle off.
Temperature limit set too low.
Thermostat set too high.
Incoming water temperature too high
causing nuisance tripping of high
temperature limit switch.
Loose connections
connection has insulation under
crimp.
Low voltage.
Probe may be fouled.
Contactor(s) may be bad.
16
Check temperature of water with a thermometer
to be certain gauges are working correctly. If not,
replace gauge(s).
Adjust or recalibrate. If thermostat will not
recalibrate properly, replace it.
If located farther than 5 linear feet (1524 mm),
pipes should be wrapped in insulation, and/or a
recirculating system installed.
Make sure tank is full of water at all times.
Contact Authorized Service Agent or Bradford
White for assistance.
causing Clean or delime tanks periodically. A water
softener or blended phosphate treatment system
may be required.
A pressure reducing valve with high pressure
bypass must be installed in the incoming water
line to allow water to expand back into the feed
line.
Clean bypass or replace with new valve
with built in bypass.
Remove check valve or anti-siphon valve to allow
for water expansion or install a back pressure
relief valve on the incoming water line.
Thermostat may be set too high or is sticking.
Recalibrate or replace the thermostat.
Contact Authorized Service Agent or Bradford
White for assistance.
If booster water heater is not overheating,
Contact Authorized Service Agent or Bradford
White for assistance.
Adjust or recalibrate to proper temperature.
Incoming water temperature should not be higher
than 160°F (71°C).
or wire Contact Authorized Service Agent or Bradford
White for assistance.
Contact Authorized Service Agent or Bradford
White for assistance.
Contact Authorized Service Agent or Bradford
White for assistance.
Contact Authorized Service Agent or Bradford
White for assistance.
Corrective Action
Form No. EBOOSTERBWM-1009