Corrective Action - Hatco Imperial Série Manuel D'installation Et D'utilisation

TROUBLESHOOTING GUIDE
WARNING
This unit must be serviced by qualified personnel only.
Service by unqualified personnel may lead to electric
shock or burn.
Symptom
Water reaches 180°F
(82°C) but does not last
through the entire dish
machine operation.
The booster heater does
not heat at all or only
delivers water at 120°-
150°F (49°-66°C).
The error indicator light is
illuminated.
Water at dish machine
is not at the proper
temperature.
Probable Cause
Low incoming water temperature.
Incoming water temperature drops.
Flow pressure is too high.
Booster heater may be undersized.
Incorrect voltage.
Unit may have been energized without water (dry
fired) causing the element(s) to burn out quickly.
Fuses may be blown or circuit breaker tripped.
Over-current fuses may be blown.
Temperature setting out of calibration or inoperable. Temperature setting should be maximum of 190°F (88°C).
Contactors do not pull in.
High limit switch may be tripped or defective.
Transformer not working properly.
Low water cutoff inoperable, contacts do not close. Remove probe wire and touch it to the tank. If contacts
Gauge(s) not working properly.
Thermostat set too low.
Booster heater has more than five (5) linear feet
(1524 mm) of water pipe to the dish machine,
causing the water to cool off inside the pipe.
ELECTRIC SHOCK HAZARD: Turn OFF power at fused
disconnect switch/circuit breaker and allow unit to
cool before performing any cleaning, adjustments, or
maintenance.
Incoming water temperature must be adequate for booster
size. Increase incoming water temperature.
Primary water supply is not adequate to provide correct
temperature in sufficient quantities. Increase supply of
primary hot water.
Higher pressure uses an excessive quantity of hot water.
Adjust flow pressure to 20 psi (138 kPa).
Booster heater must be properly sized for incoming water
temperature and rinse requirements of the dish machine.
Check voltage on heater serial plate and make sure supplied
voltage matches. A 240V booster heater operating on 208V
reduces wattage to 76% efficiency.
Replace the element(s).
Check for proper fuse sizing. Replace fuses. Check/reset
circuit breaker.
Check for shorted elements, bad fuse block or short in
wiring.
Test for voltage at coils. If coils are open or shorted, replace
contactors.
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.
Check secondary voltage, it should be the same as the
control circuit voltage. If not, replace the transformer.
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.
Check temperature of water with a thermometer to be certain
gauges are working correctly. If not, replace gauge(s).
Adjust or recalibrate, refer to "Thermostat Adjustment" in the
MAINTENANCE section. If thermostat will not recalibrate
properly, replace it.
If located farther
(1524 mm), pipes should be wrapped in insulation, and/or a
recirculating system installed.
22
English
WARNING

Corrective Action

than five (5) linear
Form No. EBOOSTERM-0321
feet