Blodgett 40ES-KLT Series - Manual (Page 21)

OM-40ES-KLT 19
Troubleshooting
SYMPTOM WHO WHAT TO CHECK
(X indicates work that should only be performed by a qualified service representative)
Kettle stops heating
before it reaches the
desired temperature. User a. Thermostat dial setting.
Authorized
Service Rep Only
b. Thermostat calibration. X
c. Thermostat operation. The thermostat should click when the dial
is rotated above and below the setting for the temperature of the
kettle. X
Kettle heats slowly. User a. For air in the jacket. See“Jacket Vacuum” in the “Maintenance”
section of this manual.
Authorized
Service Rep Only
b. Heater elements with ohmmeter for ground short or open element. If
an element is defective, call service. X
c. Voltage of main power source. X
Pressure relief valve pops. 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
Service Rep Only
c. Pressure switch setting. X
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
Pressure relief valve
leaks a small amount of
steam when the kettle is
operating. 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
Service Rep Only
b. Safety valve for defects. Replace any defective valve with an identical
valve. X
Kettle is hard to tilt. Authorized
Service Rep Only
a. Tilting gear and worm for contamination and for proper alignment
and lubrication. X