Technical Service Manual
MKG Series Gas Griddles
L22-296 Rev 0 (4/08)
Page 15
Photo 33
Photo 34
•
Turn the control to the maximum temperature
setting, Using a voltmeter, check for 115 VAC
across the blue wire(A), and white wire(B)
terminals. Also check for 115 VAC across the
orange wire(D) and white wire(B) terminals.
Voltage is necessary on both input lines, See
Photo 33. (Note: The white wires(B) is the
common Neutral wire.
•
If there is no voltage present at the blue wire(A)
terminal check the output of the corresponding
rocker switch on the upper panel.
•
If there is no voltage present at the orange
wire(D) terminal, check output voltage of MV1
at the ignition module (The other end of orange
wire), See Photo 32.
•
If 115-volt input is measured at both the blue
and orange wires, check for 115 volt output on
the gray or violet wire(C) with the control set to
the maximum temperature setting. This is the
output to the gas solenoid for the main burners.
•
If there is no output voltage on wire terminal(C)
then check probe resistance, Refer to Section
4.9.4.
•
If all the above conditions are satisfactory and
no main burner response, refer to Section
4.10.3 to replace the control.
4.9.4
Temperature Probe Check:
Resistance of the Temperature Probe changes as
the temperature changes. As temperature rises, the
probe’s resistance decreases.
•
If the probe is suspect, remove wire
connections(E) from the Solid State
temperature control, See Photo 33.
•
Using a multi-meter, check the probe resistance
against the cooking surface temperature. Use
the Resistance Chart in Section 4.9.5 to
compare the two values.
Note
: Measure
surface temperatures according to section 3.1.
•
If the probe measures open circuit (OL),
shorted (0 Ohms), or if the resistance is +/-30
Ohms from the chart value, replace the probe,
refer to Section 4.10.4.
4.9.5
Resistance Chart: Solid State
Thermistor Probe
Degrees
Celsius
(°C)
Degrees
Fahrenheit
(°F)
Resistance
In
Ohms (
Ω
Ω
Ω
Ω
)
0
32
1000.000
20
68
1077.928
40
104
1155.392
60
140
1232.392
80
176
1308.928
100
212
1385.000
120
248
1460.608
140
284
1535.751
160
320
1610.430
180
356
1684.645
200
392
1758.396
220
428
1831.683
240
464
1904.505
NOTE:
For best results check while the unit is hot,
between 320-374°F, (160-190°C).
4.10 TEMPERATURE CONTROL
REPLACEMENT
4.10.1 Snap Action Models
The thermostat sensing bulb is pressed into a
slot on the underside of the cooking surface.
The sensing bulb should be removed from this
slot first:
•
Remove the burner manifold bracket, and
burner manifold for the corresponding control
to be replaced. Refer to Section 4.6.1.
•
Remove the Pilot cover plates and burner seal
plates to access thermostat sensor, Refer to
Section 4.7.
NOTE: Do not remove bulb clamp.
•
Loosen the sensing bulb clamp(A) from griddle
plate by removing the two (2) mounting
screws(B). This bulb clamp is spring loaded
and the sensing bulb can be removed by
pushing downward on the bottom edge(C) of
the clamp, See Photo 34.
