Manitowoc QF0400 Technician's Handbook page 8

Component Check Procedures
QF0400/QC0700/QF0800/QF2200/QF2300 153
Main Fuse . . . . . . . . . . . . . . . . . . . . . . 153
ICE/OFF/CLEAN Toggle Switch . . . . . 154
Water Float Valve . . . . . . . . . . . . . . . . 155
Water Level Check . . . . . . . . . . . . . . . 156
Bin Level Probe Diagnostics . . . . . . . . 157
Water Level Probes . . . . . . . . . . . . . . 161
Motor Speed Sensor . . . . . . . . . . . . . 165
Temperature Sensor . . . . . . . . . . . . . . 167
QF2200 Only . . . . . . . . . . . . . . . . . . . . . . . 169
Low Pressure Cut-Out Control . . . . . . 169
QF2300 Only . . . . . . . . . . . . . . . . . . . . . . . 170
Equalization Valve . . . . . . . . . . . . . . . 170
Electronic Bin Thermostat . . . . . . . . . 171
S Model Nugget/Flake . . . . . . . . . . . . . . . 176
Main Fuse . . . . . . . . . . . . . . . . . . . . . . 176
ICE/OFF/CLEAN Toggle Switch . . . . . 177
Float Switch . . . . . . . . . . . . . . . . . . . . 178
Ice Damper and Hall Effect Switches . 179
SN012/SN020 Only . . . . . . . . . . . . . . . . . . 182
Selector Switch . . . . . . . . . . . . . . . . . . 182
Dispense Switch . . . . . . . . . . . . . . . . . 183
Touchless Sensor . . . . . . . . . . . . . . . . 184
All Models . . . . . . . . . . . . . . . . . . . . . . . . . 185
High Pressure Cutout Control . . . . . . . 185
Compressor Electrical Diagnostics . . . 187
Diagnosing Start Components . . . . . . 189
Self Contained Air Cooled Models . . . . . 191
Fan Cycle Control . . . . . . . . . . . . . . . . 191
Self Contained Water-cooled Models . . 192
Water Regulating Valve . . . . . . . . . . . 192
Headmaster Control Valve . . . . . . . . . . . 193
Refrigerant Recovery/Evacuation . . . . . 195
Normal Self-Contained Procedures . . 195
Remote Air-Cooled Models . . . . . . . . 199
System Contamination Clean-Up . . . . . . 202
Determining Severity Of Contamination 202
Cleanup Procedure . . . . . . . . . . . . . . 204
Replacing Pressure Controls Without Re-
moving Refrigerant Charge . . . . . . . . 207
8 Part Number 80-1230-9 10/10