Keating Of Chicago 0107 service manual Service Diagnosis, Trouble shooting

in the tube on the right side of the overflow deck. The upper sensor controls the water level and the lower sensor controls the low water safety shut-off system. Once the water On/Off switch is turned on, the blue light will come on and start to fill until the water level reaches the upper sensor. The burners will not come on until the water level reaches the lower sensor, preventing the Pasta System from being damaged if there is little or no water in it. Both sensors must be cleaned with the sensor brush (like the one provided) on an hourly basis or whenever starch foams up to maintain the proper water level. Sensors must be cleaned more often in areas with hard water, in installations with softened water (due to the salt in the water) or when oil or salt is placed in the water for cooking.

The brush must be checked on a regular basis and replaced whenever it starts to wear. Replacement brushes can be ordered under part number 009297.

CAUTION

Do not store the sensor brush in the sensor tube as it could contact the sensors, which could allow the water level to drop below the heat tubes and damage the Pasta System.

CAUTION

Using a worn brush could damage the sensors. ∞NOTE: Water level problems caused by the sensors not being cleaned adequately will not be covered under warranty.

WARNING

WHEN THE WATER LEVEL FALLS BELOW THE LOWER SENSOR THE BURNERS WILL SHUT OFF. IF THEY STAY ON, TURN THE MAIN POWER ON/OFF SWITCH TO THE “OFF” POSITION AND CLEAN THE SENSORS THOROUGHLY. IF THE PROBLEM STILL OCCURS, HAVE THE WATER AUTO-FILL SYSTEM CHECKED BY A QUALIFIED SERVICE TECHNICIAN.

Figure 4-3

Sensor Tube Location

11

V SERVICE DIAGNOSIS

λ The burners when on will produce clear blue flames directed at the inside walls of the heat transfer tubes. The radiant’s fins, located towards the rear of each transfer tube, will glow bright red, helping to ensure optimum heat distribution into the Pasta System vessel. All radiants should be pushed to the rear and then pulled gently forward (until their retaining clips engage the rear of the tubes) for optimum heat distribution.

λ On constant pilot models, the pilot light will be between 3/8" to 1/2" high and will use about 180 BTU’s of gas per hour.

λ The runner pilot tube is used to ignite the burners. Flames from the tube should be clear blue and between 3/8" to 1/2" high spread across the entire tube. The burners will ignite almost instantly after the thermostat calls for heat.

A. Water Fill and Safety Shut-Off Circuit Board and Sensor Check

When properly maintained, the Automatic Water Fill and Low Water Safety Shut-off Systems maintain the water at the proper level and prevent the burners from coming on if the water level is too low.

∞NOTE: Hard water, excessive starch and salt in water may cause water to not fill. Oil in water may cause water to not stop filling.

B. Trouble shooting

The following trouble shooting charts are only to be used as a guide to qualified service personnel. See pages 12-15. Keating recommends that you use a qualified service company.