Main Burner Malfunction - Dean SM20 Installation & Operation Manual

6.3 Main Burner Malfunction

A. Main burner will not come "ON": no gas detected at main burner.
1. Check that the gas valve is open.
2. Check that the pilot is ignited and is operating properly.
3. Check the high-limit switch for continuity.
4. The combination gas valve may be defective: replace if necessary.
B. Main burner flames are small and appear lazy: shortening does not come up to temperature
quickly.
1. Check gas pressure at the pressure tap of the gas valve. Use dial type or standard water-
type U-gauge manometer. With burner in operation, the pressure should match the
pressures listed in the table on page 3-9 – 3-10.
2. If not, remove the pressure regulator adjustment cover. Use screwdriver to turn the
adjusting screw for proper pressure. Replace cover, re-check pressure and re-install
pressure tap plug.
C. Signs of excessive temperature: shortening scorches and quickly becomes discolored.
1. Check operating thermostat. May be out of adjustment or calibration. Recalibrate if
necessary.
2. Check gas pressure as outlined above.
3. Shortening used is of inferior quality and/or shortening has been used too long. Replace
shortening.
4. Ensure frypot is clean when refilling with new shortening.
D. Fryer will not reach the temperature setting and/or runs erratically.
1. Incorrect location of sensor probe or defective temperature sensor.
2. Loose wiring/wire connection
E. Fryer shortening temperature cannot be controlled: fryer runs at high-limit temperature.
1. Defective operating thermostat or temperature probe.
2. Call Service Technician.
DEAN MILLIVOLT GAS FRYERS (CE)
CHAPTER 6: TROUBLESHOOTING
6-2