Probe Resistance Chart; Ato (Automatic Top-Off) Service Procedures; Ato (Automatic Top-Off Troubleshooting) - Frymaster FilterQuick FQG30 Service Manual

1.13

Probe Resistance Chart

For use with FilterQuick™ Series fryers manufactured with Minco Thermistor probes only.
F OHMS C F
60 1059 16 130
65 1070 18 135
70 1080 21 140
75 1091 24 145
80 1101 27 150
85 1112 29 155
90 1122 32 160
95 1133 35 165
100 1143 38 170
105 1154 41 175
110 1164 43 180
115 1174 46 185
120 1185 49 190
125 1195 52 195

1.14 ATO (Automatic Top-off) Service Procedures

The automatic top-off system is activated when the oil level falls below a sensor in the front of the frypot. The
signal is sent to the ATO board to engage the return actuator to the frypot and turn on the ATO pump. The
pump draws oil from the JIB (Jug In Box) through the rear return manifold into the rear of the frypot. Once the
oil level has satisfied the sensor, the pump turns off and the actuator closes.
The ATO board is located inside the box, behind the JIB (see Figure 1). The
power for the ATO board is supplied from the transformer box. The power
passes through the transformer inside the ATO box to the board.
1.14.1 ATO (Automatic Top-Off) Troubleshooting
Problem
Fryer tops off cold. Incorrect setpoint.
No power to ATO board
One vat tops off but
other vats fail to top off.
Probe Resistance Chart
OHMS C F
1204 54 200
1216 57 205
1226 60 210
1237 63 215
1247 66 220
1258 68 225
1268 71 230
1278 74 235
1289 77 240
1299 79 245
1309 82 250
1320 85 255
1330 88 260
1340 91 265
Probable Causes
A. J5 connection unplugged
B. Fuse blown.
C. Transformer malfunction
A. Loose wire connection.
B. Actuator issue.
OHMS C F OHMS
1350 93 270 1493
1361 96 275 1503
1371 99 280 1514
1381 102 285 1524
1391 104 290 1534
1402 107 295 1544
1412 110 300 1554
1422 113 305 1564
1432 116 310 1574
1442 118 315 1584
1453 121 320 1594
1463 124 325 1604
1473 127 330 1614
1483 129 335 1624
Ensure setpoint is correct.
A. Check to ensure J5 on front of ATO board
is fully locked into connector.
B. Ensure fuse located on right side of ATO
box is not blown.
C. Check that proper voltage is present at
transformer. See table in section 1.13.2.
A. Ensure all wiring harnesses are securely
connected to ATO board and solenoids.
B. Check return actuator to ensure actuator
is functional.
1-26
C F OHMS
132 340 1634
135 345 1644
138 350 1654
141 355 1664
143 360 1674
146 365 1684
149 370 1694
152 375 1704
154 380 1714
157 385 1724
160 390 1734
163 395 1744
166 400 1754
168 405 1764
Figure 1
Corrective Action
C
171
174
177
179
182
185
188
191
193
196
199
202
204
207