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I. 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.D. Control Board Check."
1. No Ice Production
No Ice Production - Possible Cause
1. Power Supply
2. Main Transformer
(3 phase SRK)
(208-230VAC/115VAC)
3. Water Supply
4. Fuse (SRK Control Box)
5. High-Pressure Switch (SRK)
6. Discharge Line Thermostat
(SRK)
7. Wire Harness
(From SRK to KMS)
8. Fuse (KMS Control Box)
9. Bin Control
See "II.E. Bin Control Check"
10. Control Switch
11. Control Transformer
(115VAC/10.5VAC)
12. Control Board
See "II.D. Control Board Check"
a) Off, blown fuse, or tripped breaker.
b) Not within specifications.
a) Voltage tap switch not set to proper voltage.
b) No neutral. White wire (W) to ground 0VAC. (white wire (W) to
ground 60VAC).
a) Water supply off or improper water pressure.
b) External water filters clogged.
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) Tripped with bin filled with ice.
b) Ambient temperature too cool.
c) Bulb out of position.
d) Set too warm.
e) Defective.
f) K4 connector does not have jumper in place.
a) In "SERVICE" or "OFF" 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.
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