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SYMPTOM
Kettle stops heating
before it reaches the
desired temperature.
Kettle heats slowly.
Pressure relief valve pops.
Pressure relief valve
leaks a small amount of
steam when the kettle is
operating.
Kettle is hard to tilt.
WHO
(X indicates work that should only be performed by a qualified service representative)
User
a. Thermostat dial setting.
Authorized
b. Thermostat calibration. X
Service Rep Only
c. Thermostat operation. The thermostat should click when the dial
is rotated above and below the setting for the temperature of the
kettle. X
User
a. For air in the jacket. See"Jacket Vacuum" in the "Maintenance"
section of this manual.
Authorized
b. Heater elements with ohmmeter for ground short or open element. If
Service Rep Only
an element is defective, call service. X
c. Voltage of main power source. X
User
a. For air in the jacket. See"Jacket Vacuum"in the "Maintenance"
section of this manual.
b. Whether kettle was being heated empty when valve popped.
Authorized
c. Pressure switch setting. X
Service Rep Only
d. Thermostat operation. Thermostat should click when the dial is
rotated above and below the setting for the temperature of the
kettle. X
e. Pressure relief valve. If the valve pops at pressures below 48 PSI,
replace it. X
f. Contactor, to determine whether it is de-energized. X
User
a. For contamination that prevents seating of valve. With full pressure
in the jacket, pull the lever all the way briefly to blow the valve clean,
then let the lever snap back to seat the valve.
Authorized
b. Safety valve for defects. Replace any defective valve with an identical
Service Rep Only
valve. X
Authorized
a. Tilting gear and worm for contamination and for proper alignment
Service Rep Only
and lubrication. X
Troubleshooting
WHAT TO CHECK
OM-40ES-KLT
19
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