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H. Diagnostic Tables
Before consulting the diagnostic tables, check for correct installation, proper voltage per
nameplate, and adequate water pressure (10 to 113 PSIG). Check control board using the
steps in "II.C. Control Board Check."
1. No Ice Production
No Ice Production - Possible Cause
1. Power Supply
2. Fuse (SRK Control Box)
3. High-Pressure Switch (SRK)
4. Discharge Line Thermostat
(SRK)
5. Wire Harness
(From SRK to KMS)
6. Fuse (KMS Control Box)
7. Control Switch
8. Control Transformer
(115VAC/10.5VAC)
9. Control Board
See "II.C. Control Board Check"
10. Bin Control
See "II.D. Bin Control Check"
11. Water Supply
12. Inlet Water Valve
13. Float Switch
See "II.E. Float Switch Check
and Cleaning"
a) Off, blown fuse, or tripped breaker.
b) Not within specifications.
a) Blown.
a) Dirty condenser.
b) Condensing unit fan(s) not operating.
c) Headmaster (C.P.R.) open.
d) Refrigerant overcharged.
e) Bad contacts.
f) Refrigerant lines or components plugged.
a) Ambient temperature too warm.
b) Compressor or compressor components faulty.
c) Defective.
d) Hot gas valves open.
e) Dirty condenser.
f) Condensing unit fan(s) not operating.
a) Disconnected or loose connection.
a) Blown.
a) In "OFF" or "WASH" position.
b) Bad contacts.
a) Coil winding open or shorted.
a) In alarm.
b) Yellow "BC OPEN" LED on (jumper loose or missing).
c) Defective.
a) Tripped with bin filled with ice.
b) Actuator does not move freely.
c) Defective.
a) Water supply off or improper water pressure.
b) External water filters clogged.
a) Screen or orifice clogged.
b) Coil winding open.
c) Water valve open in freeze cycle.
a) Float does not move freely.
b) Defective.
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