Specifications

Symptom Probable Cause Corrective Action
Water reaches 180°F (82°C) but
does not last through the entire
dish machine operation.
Low incoming water temperature. Incoming water temperature must be
adequate for booster size. Increase incoming
water temperature.
Incoming water temperature drops. Primary water supply is not adequate to
provide correct temperature in sufficient
quantities. Increase supply of primary hot
water.
Flow pressure is too high. Higher pressure uses an excessive quantity of
hot water. Adjust flow pressure to 20 psi (138
kPa).
Booster heater may be undersized. Booster heater must be properly sized for
incoming water temperature and rinse
requirements of the dish machine.
Incorrect voltage. Check voltage on heater serial plate and make
sure supplied voltage matches. A 240V
booster heater operating on 208V reduces
wattage to 76% efficiency.
The booster heater does not
heat at all or only delivers water
at 120°- 150°F (49°-66°C).
Unit may have been energized without
water (dry fired) causing the element(s) to
burn out quickly.
Replace the element(s).
Fuses may be blown or circuit breaker
tripped.
Check for proper fuse sizing. Replace fuses.
Check/reset circuit breaker.
Over-current fuses may be blown. Check for shorted elements, bad fuse block or
short in wiring.
Temperature setting out of calibration or
inoperable.
Temperature setting should be maximum of
190°F (88°C).
Contactors do not pull in. Test for voltage at coils. If coils are open or
shorted, replace contactors.
High limit switch may be tripped or
defective.
Reset switch, refer to “High Temperature Limit
Safety Switch” in the MAINTENANCE section.
If switch continues to trip or cannot be reset
contact an Authorized Service Agent.
Transformer not working properly. Check secondary voltage, it should be the
same as the control circuit voltage. If not,
replace the transformer.
Low water cutoff inoperable, contacts do
not close.
Remove probe wire and touch it to the tank. If
contacts close, probe is fouled and must be
cleaned or replaced.
Relay on circuit board maybe defective.
Jumper terminals 6 and 7. If unit energizes,
circuit board is defective and should be
replaced.
TROUBLESHOOTING GUIDE
Form No. EBOOSTERM-0712
28
This unit must be serviced by qualified personnel only.
Service by unqualified personnel may lead to electric
shock or burn.
WARNING
ELECTRIC SHOCK HAZARD: Turn OFF power at fused
disconnect switch/circuit breaker and allow unit to cool
before performing any cleaning, adjustments, or
maintenance.
WARNING