TurboChef Technologies Residential Single and Double Wall Oven - Manual (Page 70)

6.6 TROUBLESHOOTING
Troubleshooting the RTD (Single Wall Oven),
1. Disconnect power from the oven.
2. Disconnect J15 from the control board.
3. Test the RTD on pins J15-20 and J15-21 for
109 ohms at 75°F (24°C).
4. If 109 ohms (or appropriate value) are present,
replace the control board and retest. If not,
replace the RTD and retest.
Transformer, Clock,12 VAC (Gen 1)
1. Test for 12 VAC at the terminals at the two thin
white
wires.
- If 12 VAC is present, the transformer is
functioning properly.
- If no voltage is present, continue to step 2.
2. Test for 120 VAC at the terminals of the thick
white and blue wire.
- If 120 VAC is present, the transformer is
faulty and needs to be replaced.
- If no voltage is present, investigate the 15
amp fuse/fuse block.
Transformer, Clock,12 VAC (Gen 2)
1. Test for 12 VAC at terminalsRBJ18-1 and
RBJ18-2 on the relay board.
- If 12 VAC is present, the transformer is
functioning properly.
- If no voltage is present, continue to step 2.
2. Test for 120 VAC at the terminals at the thick
white and blue wire.
RTD
Th e procedures below outline troubleshooting
procedures for the RTD in the Gen 1, Gen 2, and
Single Wall Oven.
Troubleshooting the RTD (Gen 1),
1. Turn oven power off and pull the oven 11” (280
mm) out of the cabinet.
2. Remove the top front cover.
3. Remove P9 from the control board and test the
lower RTD on pins P9-5 and P9-6 for 109
ohms at 75°F (24°C).
4. Remove P10 from the board and test the upper
sensor on pins P10-19 and P10-20 for 109
ohms at 75°F (24°C).
5. If 109 ohms (or appropriate value) are present,
replace the control board and retest. If not,
replace the appropriate RTD and retest.
Troubleshooting the RTD (Gen 2),
1. Turn oven power off and pull the oven 11” (280
mm) out of the cabinet.
2. Remove the top front cover.
3. Remove J16 from the control board and test the
lower RTD on pins J16-8 and J16-9 for 109
ohms at 75°F (24°C).
4. Remove J15 from the control board and test the
upper RTD on pins J15-20 and J15-21 for 109
ohms at 75°F (24°C).
5. If 109 ohms (or appropriate value) are present,
replace the control board and retest. If not,
replace the appropriate RTD and retest.
°F 0° +20° +40° +60° +80° +100° +120° +140° +160° +180° +200°
0° 90.03 Ω 97.39 Ω 101.74 Ω 106.07 Ω 110.38 Ω 114.68 Ω 118.97 Ω 123.24 Ω 127.50 Ω 131.74 Ω 135.97 Ω
+200° 135.94 Ω 140.18 Ω 144.38 Ω 148.57 Ω 152.74 Ω 159.90 Ω 161.04 Ω 165.17 Ω 169.29 Ω 173.39 Ω 177.47 Ω
+400° 177.47 Ω 181.54 Ω 185.60 Ω 189.64 Ω 193.67 Ω 197.69 Ω 201.69 Ω 205.67 Ω 209.64 Ω 213.60 Ω 217.54 Ω
+600° 217.54 Ω 221.47 Ω 225.38 Ω 229.28 Ω 233.17 Ω 237.04 Ω 240.90 Ω 244.74 Ω 248.57 Ω 252.38 Ω 256.18 Ω
°C 0° +10° +20° +30° +40° +50° +60° +70° +80° +90° +100°
0° 100.00 Ω 103.90 Ω 107.79 Ω 111.67 Ω 115.54 Ω 119.40 Ω 123.24 Ω 127.07 Ω 130.89 Ω 134.70 Ω 138.50 Ω
+100° 138.50 Ω 142.29 Ω 146.06 Ω 149.82 Ω 153.58 Ω 157.31 Ω 161.04 Ω 164.76 Ω 168.46 Ω 172.16 Ω 175.84 Ω
+200° 175.84 Ω 175.91 Ω 183.17 Ω 186.82 Ω 190.45 Ω 194.07 Ω 197.69 Ω 201.29 Ω 204.88 Ω 208.45 Ω 212.02 Ω
+300° 212.02 Ω 215.57 Ω 219.12 Ω 222.65 Ω 226.17 Ω 229.67 Ω 233.17 Ω 236.65 Ω 240.13 Ω 243.59 Ω 247.04 Ω
Figure 6.3: Temperature-Ohm Chart (Celsius)
Figure 6.2: Temperature-Ohm Chart (Fahrenheit)