Service Manual

31
G. Diagnostic Tables
Before consulting the diagnostic charts, check for correct installation, proper voltage per
appliance nameplate, and adequate water supply. Check control board using the steps in
"II.C. Control Board Check."
1. No Ice Production
No Ice Production - Possible Cause
Startup
1. Power Supply-FS a) Unplugged, off, blown fuse, or tripped breaker.
b) Not within specications.
c) Loose connection.
d) Bad contacts.
Power Supply-SRC a) Off, tripped breaker
b) Not within specications.
c) Loose connection.
d) Bad contacts.
2. Water Supply a) Water supply off or improper water pressure.
b) External water lters clogged.
3. Power Switch a) "OFF" position.
b) Bad contacts.
4. Control Transformer
(115VAC/24VAC)
a) Coil winding open or shorted.
5. 1A Fuse (Control Box) a) Blown.
6. Control Board
See "II.C. Control Board Check"
a) In alarm.
b) Defective
7. Control Switch a) In "DRAIN" position.
b) Bad contacts.
8. BC (infrared sensor) a) No power, lens dirty, or defective.
b) Control board dip switch 7 off.
Fill Cycle
1. Control Board a) No power to inlet water valve.
b) No power to oat switch or not reading oat switch condition.
2. Inlet Water Valve a) Screen or orice clogged.
b) Coil winding opened.
3. Float Switch a) Float does not move freely.
b) Defective.
4. Drain Valve a) Valve seat clogged and water leaking.
5. Hoses a) Disconnected.
Ice Purge Cycle
1. Control Board a) No power to gear motor.
b) No power to compressor control relay.
2. Gear Motor a) Blown fuse.
b) Internal protector open.
c) Defective.