Service Manual

39
F. Diagnostic Charts
Before consulting the diagnostic charts, check for correct installation, proper voltage per unit
nameplate,andadequatewatersupply.CheckCBusingthestepsin"IV.B.ControlBoard
Check."CheckthedipswitchsettingstoassurethatS4dipswitch3,4,7,8,9,10,and
S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, 6 are
cleaningadjustmentsandthesettingsareexible.Forfactorydefaultsettings,see"II.C.3.a)
DefaultDipSwitchSettings."
1. No Ice Production
No Ice Production - Possible Cause
1. Power Supply a) Off, blown fuse, or tripped breaker.
b) Not within specications.
2. Main Transformer
(208-230V/115V) (3 Phase Only)
a) Voltage tap switch not set to proper voltage.
b) Coil winding open or shorted.
3. Water Supply a) Water supply off or improper water pressure.
b) External water lters clogged.
4. Fuse (SRK Control Box) a) Blown.
5. High-Pressure Switch (SRK) a) Dirty condenser.
b) Condensing unit fan not operating.
c) Headmaster (C.P.R.) open.
d) Refrigerant overcharged.
e) Bad contacts.
f) Refrigerant lines or components plugged.
6. Discharge Line Thermostat
(SRK)
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 not operating.
7. Wire Harness
(From SRK to KMS)
a) Disconnected or loose connection.
8. Fuse (KMS Control Box) a) Blown.
9. Control Switch a) In"WASH"or"OFF"position.
b) Bad contacts.
10. Control Transformer
(115V/10.5V)
a) Coil winding open or shorted.
11. Interlock Switch (Cleaning Valve) a) In open (vertical) position.
b) Bad contacts.
12. Control Board
See "IV.B.ControlBoardCheck"
a) In alarm.
b) Yellow"BCOPEN"LEDon(binfull).
c) Defective.
13. Bin Control
See"IV.C.BinControlCheckand
Cleaning"
a) Tripped with bin lled with ice.
b) Actuator does not move freely.
c) Defective.